Insect Repellent-Sunscreen Drug Products for Over-the-Counter Human Use; Request for Information and Comments, 7941-7945 [E7-2890]
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Federal Register / Vol. 72, No. 35 / Thursday, February 22, 2007 / Proposed Rules
The Proposed Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA proposes to amend 14 CFR part
39 as follows:
Issued in Renton, Washington, on
February 13, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E7–2975 Filed 2–21–07; 8:45 am]
PART 39—AIRWORTHINESS
DIRECTIVES
BILLING CODE 4910–13–P
1. The authority citation for part 39
continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
§ 39.13
Food and Drug Administration
[Amended]
2. The Federal Aviation
Administration (FAA) amends § 39.13
by adding the following new
airworthiness directive (AD):
21 CFR Part 352
[Docket No. 2006N–0479]
McDonnell Douglas: Docket No. FAA–2007–
27302; Directorate Identifier 2006–NM–
273–AD.
Comments Due Date
(a) The FAA must receive comments on
this AD action by April 9, 2007.
Insect Repellent-Sunscreen Drug
Products for Over-the-Counter Human
Use; Request for Information and
Comments
Food and Drug Administration,
HHS.
Request for data and
information.
ACTION:
Applicability
(c) This AD applies to McDonnell Douglas
Model DC–10–30 and DC–10–30F (KC–10A
and KDC–10) airplanes, certificated in any
category; as identified McDonnell Douglas
DC–10 Service Bulletin 24–128, dated
January 19, 1984.
Unsafe Condition
(d) This AD results from fuel system
reviews conducted by the manufacturer. We
are issuing this AD to prevent the potential
of ignition sources inside fuel tanks, which,
in combination with flammable fuel vapors,
could result in fuel tank explosions and
consequent loss of the airplane.
Compliance
(e) You are responsible for having the
actions required by this AD performed within
the compliance times specified, unless the
actions have already been done.
Modification
(f) Within 60 months after the effective
date of this AD, install Teflon sleeving
around the fuel pump wire harness inside the
conduit in the aft supplemental fuel tank, in
accordance with the Accomplishment
Instructions of McDonnell Douglas DC–10
Service Bulletin 24–128, dated January 19,
1984.
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RIN 0910–AF43
AGENCY:
Affected ADs
(b) None.
Alternative Methods of Compliance
(AMOCs)
(g)(1) The Manager, Los Angeles Aircraft
Certification Office, FAA, has the authority to
approve AMOCs for this AD, if requested in
accordance with the procedures found in 14
CFR 39.19.
(2) Before using any AMOC approved in
accordance with § 39.19 on any airplane to
which the AMOC applies, notify the
appropriate principal inspector in the FAA
Flight Standards Certificate Holding District
Office.
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DEPARTMENT OF HEALTH AND
HUMAN SERVICES
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SUMMARY: The Food and Drug
Administration (FDA) is seeking
information to formulate a regulatory
position on insect repellent products
that contain over-the-counter (OTC)
sunscreen ingredients. FDA is
considering amending its monograph for
OTC sunscreen drug products (the
regulation that establishes conditions
under which these drug products are
generally recognized as safe and
effective and not misbranded) to add
conditions for marketing insect
repellent-sunscreen drug products. The
insect repellent ingredients in these
products are regulated by the
Environmental Protection Agency
(EPA). Elsewhere in this issue of the
Federal Register is a companion
document in which EPA is also
requesting information and comments
on these products. The decision on what
regulations, if any, to propose will be
based, in part, on information and
comments submitted in response to this
request for data and information.
DATES: Submit written or electronic
comments by May 23, 2007.
ADDRESSES: You may submit comments,
identified by Docket No. 2006N–0479 or
RIN 0910–AF43, by any of the following
methods:
Electronic Submissions
Submit electronic comments in the
following ways:
• Federal eRulemaking Portal: https://
www.regulations.gov. Follow the
instructions for submitting comments.
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• Agency Web site: https://
www.fda.gov/dockets/ecomments.
Follow the instructions for submitting
comments on the agency Web site.
Written Submissions
Submit written submissions in the
following ways:
• FAX: 301–827–6870.
• Mail/Hand delivery/Courier [For
paper, disk, or CD–ROM submissions]:
Division of Dockets Management (HFA–
305), Food and Drug Administration,
5630 Fishers Lane, rm. 1061, Rockville,
MD 20852.
To ensure more timely processing of
comments, FDA is no longer accepting
comments submitted to the agency by email. FDA encourages you to continue
to submit electronic comments by using
the Federal eRulemaking Portal or the
agency Web site, as described in the
Electronic Submissions portion of this
paragraph.
Instructions: All submissions received
must include the agency name and
Docket No. and Regulatory Information
Number (RIN) for this rulemaking. All
comments received will be posted
without change to https://www.fda.gov/
ohrms/dockets/default.htm, including
any personal information provided. For
additional information on submitting
comments, see the ‘‘Comments’’ heading
of the SUPPLEMENTARY INFORMATION
section of this document.
Docket: For access to the docket to
read background documents or
comments received, go to https://
www.fda.gov/ohrms/dockets/
default.htm and insert the docket
number, found in brackets in the
heading of this document, into the
‘‘Search’’ box and follow the prompts
and/or go to the Division of Dockets
Management, 5630 Fishers Lane, rm.
1061, Rockville, MD 20852.
FOR FURTHER INFORMATION CONTACT:
Matthew R. Holman, Center for Drug
Evaluation and Research, Food and
Drug Administration, 10903 New
Hampshire Ave., Bldg. 22, MS 5411,
Silver Spring, MD 20993, 301–796–
2090.
SUPPLEMENTARY INFORMATION:
I. Background
A. Description of Insect RepellentSunscreen Drug Products
FDA and EPA are seeking information
to formulate a regulatory position for
combination insect repellent-sunscreen
drug products for use on human skin.
Because sunscreen drug products are
regulated by FDA and the insect
repellent components of these products
are separately regulated by EPA, both
agencies are seeking comments to
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determine how these combination
products should be regulated.
Currently, approximately 20
combination insect repellent-sunscreen
drug products are available for
consumers. These products consist of
one of three insect repellents (N,Ndiethyl-meta-toluamide (DEET), oil of
citronella, or IR3535) and a sunscreen
component (one or more sunscreen
ingredients). Combination insect
repellent-sunscreen drug products are
available in lotion, cream, and spray-on
formulations and are currently marketed
for use by the entire family. Due to
concerns about the potential conflict in
the directions for use and other labeling
requirements for the insect repellent
and the sunscreen components of the
product, EPA postponed a regulatory
decision on combination DEET/
sunscreen products in its Reregistration
Eligibility Decision (RED) for DEET
(December 1998) until additional
information could be obtained. This
document solicits opinion and comment
from the public to assist both agencies
in regulating these products.
B. Regulatory Status of the Insect
Repellent Ingredients
EPA regulates insect repellents under
the Federal Insecticide, Fungicide, and
Rodenticide Act (FIFRA). Three insect
repellent active ingredients are
currently used in combination with
sunscreens: DEET, oil of citronella, and
IR3535. EPA recently registered two
other insect repellents, p-menthane-3,8diol and picaridin. However, neither is
currently available in combination with
a sunscreen. Both DEET and oil of
citronella have undergone reregistration,
which entailed an evaluation and
analysis of the complete database for
each ingredient by EPA. IR3535, pmenthane-3,8-diol, and picaridin are
registered chemicals evaluated by the
registration process, which involves a
similar analysis by EPA. They have not
yet undergone the reregistration
analysis.
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1. DEET
In December 1998, EPA completed its
RED for DEET (Ref. 1), which includes
the active ingredient N,N-diethyl-metatoluamide and its isomers. DEET
products, which are applied directly to
skin and/or clothing, are available in
numerous formulations (e.g., aerosol
and non-aerosol sprays, creams, lotions,
sticks, foams, and towelettes) and
concentrations (products range from
about 4 percent to 100 percent active
ingredient). DEET is an insect and mite
repellent labeled for use in households/
domestic dwellings, on the human body
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and clothing, on cats, dogs, and horses,
and in pet living/sleeping quarters.
Based on pesticide usage information
mainly for 1990 (Ref. 1), an average
annual estimate of the domestic usage of
DEET is 4 million pounds (active
ingredient). About 30 percent of the U.S.
population uses DEET annually as an
insect repellent (this figure includes
about 27 percent of adult males, 31
percent of adult females, and 34 percent
of children). Approximately 21 percent
of U.S. households use DEET annually.
About 19 percent of households use
DEET on household members, and
about 4 percent of households that have
cats and/or dogs use DEET on those
pets.
EPA indicated in its DEET RED (Ref.
1):
The Agency is concerned about consumer
use of products that combine sunscreen and
DEET, since directions to reapply sunscreens
generously and frequently may promote
greater use of DEET than needed for
pesticidal efficacy and thus pose unnecessary
exposure to DEET. DEET labels currently
recommend that products be used sparingly
and not be reapplied too often. Sunscreen
products, however, recommend frequent
reapplication. No benefits attach to use of
DEET more frequently than necessary to
achieve its purpose.
EPA did not make a regulatory
decision regarding these DEETsunscreen products at that time because
it believed that it had not yet obtained
adequate information.
2. Oil of Citronella
In February 1997, EPA completed its
RED for Oil of Citronella (Ref. 2). This
decision includes a comprehensive
reassessment of the required target data
and the use patterns of currently
registered oil of citronella products. Oil
of citronella is a biochemical pesticide.
It is registered as an animal repellent
and as an insect repellent/feeding
depressant. Oil of citronella is the
volatile oil obtained from the steam
distillation of freshly cut or partially
dried grasses (Cymbopogon nardus
(Rendal) and Cymbopogon winterianus
(Jowitt)). Two varieties of citronella oil
exist commercially: ‘‘Ceylon type’’
(derived from C. nardus) and ‘‘Java
type’’ (derived from C. winterianus).
Based on pesticide survey usage
information for 1991 and 1992 (Ref. 2),
annual oil of citronella domestic usage
ranged approximately from 33,000 to
48,000 pounds active ingredient for four
sites: Domestic dwellings; ornamentals;
human face, skin, and clothing; and
manufacturing. The largest markets, in
terms of total pounds active ingredient,
for oil of citronella as an insect repellent
are: Human face, skin, and clothing (56
to 74 percent); domestic dwelling
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[outdoor] (22 to 41 percent); and
ornamentals (1.5 to 2.0 percent). The
balance is used for manufacturing.
In the RED (Ref. 2), EPA required all
oil of citronella products with label
claims for repelling mosquitoes, fleas,
and ticks to have a minimum protection
time of 1 hour. The directions for use
must also contain the following
statement pertaining to maintenance of
repellent activity: ‘‘For maximum
repellent effectiveness of this product,
repeat applications at 1 hour intervals.’’
The RED allows the labeling to claim a
protection time longer than 1 hour so
long as it can be supported by product
performance data showing an acceptable
level of repellent activity. Because the
principal uses of oil of citronella are
dermal, special precautionary labeling
related to dermal sensitization and
irritation is required for all products
with use directions for dermal
application. EPA (Ref. 2) requires oil of
citronella-sunscreen products for
dermal application to bear the following
precautionary statements regarding
dermal sensitivity: ‘‘For external use
only. Avoid contact with eyes.
Discontinue if irritation or rash appears.
Use on children under 6 months of age
only with the advice of a physician.’’
These precautionary statements are
consistent with the warnings and
directions (regarding use on children
under 6 months of age) that appear in
FDA’s stayed monograph for OTC
sunscreen drug products (part 352 (21
CFR part 352)).
3. IR3535
The third currently registered insect
repellent used in combination with a
sunscreen is IR3535 (CAS number
52304–36–6). In 1997, EPA classified
IR3535 as a biochemical for the
following reasons (Ref. 3): (1) It is
functionally identical to naturally
occurring beta-alanine, (2) both
ingredients repel insects, (3) their basic
molecular structure is identical, (4) the
end groups are not likely to contribute
to toxicity, and (5) IR3535 acts to
control the target pest via a nontoxic
mode of action. IR3535 is a technical
grade synthetic biochemical pesticide
that is produced by an integrated
process. It is a liquid containing 98
percent 3-[N-Butyl-N-acetyl]aminopropionic acid, ethyl ester as the
active ingredient and 2 percent inert
ingredients.
4. p-menthane-3,8-diol and KBR 3023
There are two insect repellent active
ingredients that are not currently used
in a combination insect repellentsunscreen drug product. However, for
the purposes of completeness, all
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currently registered insect repellents are
discussed within this document.
The first ingredient is p-menthane3,8-diol, a biochemical pesticide that is
chemically synthesized, although the
natural oil can be extracted from lemon
eucalyptus leaves and twigs (Ref. 4). It
can be used in spray and lotion
products to repel insects such as
mosquitoes.
The other insect repellent is KBR
3023, which contains the active
ingredient picaridin. This chemical is
currently formulated only for
application to human skin. In December
2000, EPA registered a 15 percent
pump-spray, 10 percent aerosol spray, 7
percent cream, 7 percent pump-spray, 5
percent cream, and 5 percent pumpspray (Ref. 5).
C. Regulatory Status of the Sunscreen
Ingredients
In the Federal Register of May 21,
1999 (64 FR 27666), FDA issued a final
monograph for OTC sunscreen drug
products in part 352, establishing
conditions under which these products
are generally recognized as safe and
effective and not misbranded. The
monograph includes 16 sunscreen
active ingredients in § 352.10; provides
for combinations of sunscreen active
ingredients in § 352.20; specifies
required labeling in §§ 352.50, 352.52,
and 352.60; and sets forth required
testing procedures in §§ 352.70 through
352.77. Once the monograph becomes
effective, any drug product (including
any combination insect repellentsunscreen drug product) that contains
unsuitable inactive ingredients or active
drug ingredients that do not comply
with the monograph will be considered
a new drug and require an approved
new drug application (NDA) before it
may be legally marketed in the United
States.
Initially, the final monograph was to
become effective on May 21, 2001, but
FDA subsequently extended that date to
December 31, 2002 (65 FR 36319, June
8, 2000). FDA then stayed the effective
date of the monograph until further
notice (66 FR 67485, December 31,
2001). FDA has delayed this effective
date as it prepares an amendment to
part 352 to address formulation,
labeling, and testing requirements for
ultraviolet A (UVA) radiation protection
and to revise some of the requirements
for ultraviolet B (UVB) radiation
protection in a more comprehensive
final monograph.
Historically, FDA has used its
enforcement discretion to allow the
marketing of insect repellent-sunscreen
drug products pending the issuance of
the final sunscreen monograph so long
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as the products contained sunscreen
ingredients included in the FDA
rulemaking and were registered with
EPA. These types of products were first
marketed before the OTC drug review
began in 1972, and FDA has not
explicitly addressed them at any time in
the rulemaking for OTC sunscreen drug
products. Because they have always
contained a pesticide, the combination
insect repellent-sunscreen products
have also historically been registered
with and regulated by EPA.
FDA is now interested in determining
whether it should further amend that
monograph to address these
combination products. Once the final
monograph for sunscreen drug products
becomes effective, any combination
product containing an unsuitable
inactive ingredient or an active drug
ingredient that is not included in the
final monograph will be considered a
new drug and need an NDA to be legally
marketed, even if the product is also
registered with EPA. Thus, one purpose
of this document is to gather
information to help FDA formulate its
regulatory position toward these
combination products.
D. Regulatory Jurisdiction Over Insect
Repellent-Sunscreen Drug Products
In the Federal Register of December
22, 1971 (36 FR 24234), the Department
of Health, Education, and Welfare
(DHEW) and EPA published a
Memorandum of Agreement (the
Agreement) regarding matters of mutual
responsibility under the Federal Food,
Drug, and Cosmetic Act (FFDCA) and
the FIFRA. The Agreement was
amended in the Federal Register of
September 6, 1973 (38 FR 24233). This
Agreement does not explicitly address
products that combine sunscreen and
insect repellent active ingredients. As
noted, one purpose of this document is
to solicit comments regarding the
complexities of joint jurisdiction of
these combination products.
II. Information Requested and Specific
Topics for Comment
Interested persons are asked to review
and comment upon all aspects of both
FDA’s and EPA’s documents. Interested
persons should submit all comments to
both agencies. Both agencies have
potential safety and effectiveness
concerns for some of these products
because of the different intervals of time
required or recommended between
applications of sunscreens versus insect
repellents. FDA is particularly
interested in receiving comments on the
following topics:
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A. Possible Manufacturing Conflicts
Because they contain ingredients
regulated by EPA and FDA, all insect
repellent-sunscreen drug products
currently need to comply with both
EPA’s testing and laboratory
requirements in 40 CFR part 158 and
FDA’s current good manufacturing
practice for finished pharmaceuticals
requirements in part 211 (21 CFR part
211). The products will also have to
meet the testing procedures for OTC
sunscreen drug products in part 352,
subpart D, when that monograph
becomes effective. The agencies are not
aware of any specific manufacturing
requirements that conflict and invite
specific comment and information on
this subject.
1. Are manufacturers of insect
repellent-sunscreen drug products or
others aware of any conflicts between
the EPA and FDA manufacturing
requirements for these products? If yes,
is there any way to resolve the
conflict(s)?
2. Approximately 20 insect repellentsunscreen drug products are currently
registered with EPA. If there is a future
FDA rulemaking for all combination
insect repellent-sunscreen drug
products, how should these currently
registered products be addressed in the
sunscreen monograph? What
requirements should be retained,
revised, or eliminated from the
sunscreen monograph?
3. Have manufacturers of currently
marketed insect repellent-sunscreen
drug products conducted any of the
testing described in part 352, subpart D,
for their combination product(s),
notwithstanding that the effective date
of part 352 has been stayed? If yes, what
problems, if any, have they
encountered?
B. Possible Formulation Conflicts
During completion of its DEET RED,
EPA solicited information from
registrants of insect repellent-sunscreen
drug products on the possibility of
formulation conflicts. At that time, EPA
received information that suggests a
potential formulation conflict is
encountered when sunscreen and insect
repellent are used separately (or
sequentially applied) (Ref. 6). It is
unclear whether this formulation issue
poses a similar or related problem when
these ingredients are combined into a
single product. The agencies invite
specific comment and information on
this subject.
C. Possible Labeling Conflicts
Insect repellent and sunscreen
products each have different labeling
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requirements that may conflict when
both are combined and packaged in one
product. The insect repellent
component is subject to the labeling
requirements in 40 CFR 156.10 entitled
‘‘labeling requirements and the active
ingredient specific requirements.’’ For
each registered insect repellent, these
requirements are listed in the
registration or reregistration documents.
The sunscreen component of the
product is subject to the labeling
requirements in § 201.66 (21 CFR
201.66) and part 352. However, FDA has
stayed these regulations for OTC
sunscreen drug products until we issue
a sunscreen final rule (69 FR 53801
(September 3, 2004) and 66 FR 67485).
The agencies are concerned that the
labeling format and some of the content
requirements vary between the EPA and
FDA requirements. For example, FDA
uses the word ‘‘warning’’ on labels,
while EPA uses the word ‘‘caution’’ and
only uses the word ‘‘warning’’ as an
indicator of toxicity level on pesticide
labels. Many of the required warning
section headings are also different. In
addition, the application directions for
the sunscreen and the insect repellent
components may be significantly
different. For example, the application
directions for sunscreens state to ‘‘apply
liberally (or generously) * * * as
needed’’ and provide for application to
more areas of the body than do the
application instructions for insect
repellents, which tend to restrict the
frequency of application and where and
how the product can be applied.
EPA requirements for DEET include
labeling that states: ‘‘Apply sparingly
around ears.’’ and ‘‘Do not apply to
children’s hands.’’ The directions for
some DEET products require a 6-hour
interval between applications and state:
‘‘Use just enough repellent to cover
exposed skin and/or clothing’’ and
‘‘avoid over-application of this
product.’’ Also, a currently marketed
insect repellent (DEET)-sunscreen drug
product states in its labeling ‘‘frequent
reapplication and saturation is
unnecessary for effectiveness.’’ While
frequent reapplication may not be
necessary for the effectiveness of the
DEET in this product, frequent
reapplication may be necessary for the
effectiveness of the sunscreen.
Hence, there are many differences
between the labeling required by FDA
for OTC drugs and EPA for pesticides.
The labeling formats, labeling content,
and the order in which information is
presented are quite different. FDA and
EPA are exploring whether they can
reconcile these differences, safeguard
the public health, and still adequately
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meet the requirements of FFDCA and
FIFRA.
1. Concerning an integrated label, can
the different instructions for the two
components (regarding frequency of
application and where the product can
be applied) be reconciled into a single
direction that does not lead to improper
application (i.e., incorrect location),
over-application of the insect repellent,
or under-application of the sunscreen?
Is there labeling that would reflect the
differences in reapplication intervals for
DEET when combined with sunscreen
ingredients? Oil of citronella when
combined with sunscreen ingredients?
IR3535 when combined with sunscreen
ingredients?
2. The FFDCA requires that all OTC
drug products list the established name
of each inactive ingredient on the
outside container of the retail package
(see section 502(e)(1)(A)(iii) of FFDCA
(21 U.S.C. 352(e)(1)(A)(iii)); also see
§ 201.66(c)(8)). EPA does not require a
complete declaration of ‘‘inactive or
inert’’ ingredients and normally does
not require insect repellent
manufacturers to list the identities of
inert ingredients on product labels.
However, under FIFRA, if one inert
ingredient is disclosed in product
labeling, then all inert ingredients must
be disclosed. EPA is currently
discussing, with a wide spectrum of
stakeholders, how to make information
concerning inert ingredients more
widely available. The results of those
discussions will affect combination
insect repellent-sunscreen drug
products as well as other pesticide
products. Failure to list all of the
inactive ingredients in the product’s
labeling, including all such ingredients
in the insect repellent, would cause a
combination insect repellent-sunscreen
drug product to be misbranded under
the FFDCA (see section 502(e)(1)(A)(iii)
of FFDCA). Is there a way to label
combination sunscreen-insect repellent
drug products that satisfies FFDCA’s
requirements under section 502(e)(1)(A)
of FFDCA but does not violate FIFRA?
Are those ingredients that are ‘‘inert’’
under FIFRA also necessarily ‘‘inactive’’
under FFDCA?
D. Safety Issues
FDA is aware of only two studies
examining percutaneous absorption
when combining an insect repellent
with a sunscreen. One study involved
hairless mice (Ref. 6) and the other
study involved piglets (Ref. 7). Both
studies demonstrate increased
absorption of the insect repellent DEET
and different sunscreens when the
components were combined. Thus, FDA
would like more information concerning
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the safety of insect repellent-sunscreen
drug products:
1. Is there data available to show
whether increased absorption of the
sunscreen ingredients(s) does or does
not occur as a result of being combined
with an insect repellent ingredient? If
so, please provide. For example, is there
any evidence that absorption increases
as the particle size of titanium dioxide
and zinc oxide decreases (down to a few
nanometers) in insect repellentsunscreen products? If so, is there
evidence regarding the health or safety
effects associated with the increased
absorption?
2. Are there reports or other
information relating to skin irritation
resulting from use of a combination
insect repellent-sunscreen drug product
are manufacturers of these products or
others aware of? Provide a summary of
the types of events reported and, if
possible, estimate an incidence of
occurrence.
E. Effectiveness Issues
For some insect repellent-sunscreen
products, FDA has effectiveness
concerns because of the interval of time
required or recommended between
applications of the product. EPA
identifies reapplication times on insect
repellent labels so consumers can
maintain the maximum protection
against insect bites but avoid overexposure. This reapplication time
relates to the effectiveness of the insect
repellent portion of the product and not
to the sunscreen protection. The
directions for sunscreen products,
which encourage frequent reapplication
of the drug, relate to the effectiveness of
the sunscreen component of the product
and not to the insect repellent
component.
The differences in directions for use
for the insect repellent component and
the sunscreen component need to be
resolved to ensure safety and
effectiveness of both components and
the combination product as a whole. For
example, the directions for some
products containing DEET require a 6hour interval between applications and
state ‘‘use just enough repellent to cover
exposed skin and/or clothing’’ and
‘‘avoid over-application of this
product.’’ In contrast, the directions for
sunscreen drug products in
§ 352.52(d)(1) and (d)(2) state to ‘‘apply
liberally, generously, smoothly, or
evenly * * * before sun exposure and
as needed,’’ and ‘‘reapply as needed or
after towel drying, swimming, or (select
‘sweating’ or ‘perspiring’).’’ Section
352.60(d) of the sunscreen monograph
also states that ‘‘when the time intervals
or age limitations for administration of
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erjones on PRODPC74 with PROPOSALS
Federal Register / Vol. 72, No. 35 / Thursday, February 22, 2007 / Proposed Rules
the individual ingredients differ, the
directions for the combination product
may not contain any dosage that
exceeds those established for any
individual ingredient in the applicable
OTC drug monograph(s), and may not
provide for use by any age group lower
than the highest minimum age limit
established for any individual
ingredient.’’
Concerns about effectiveness also
stem from a study (Ref. 8) indicating
that separate application of sunscreen
followed by DEET resulted in a decrease
in sun protection factor (SPF) after
application of the insect repellent. Thus,
FDA is soliciting comment on the
following questions:
1. Is there additional evidence
suggesting that application of a
sunscreen product followed by
application of a separate insect repellent
product results in a decrease in the
sunscreen’s SPF? Is there evidence
suggesting that sequential application of
the products has no adverse effect on
the sunscreen?
2. Is there evidence suggesting that
combining a sunscreen and insect
repellent in a single formulation
adversely impacts the effectiveness of
the sunscreen? Is there evidence
suggesting that such a combination has
no adverse impact on the sunscreen
component?
3. Are there effective concentrations
of the insect repellent ingredients that
could be used to allow for liberal
application and frequent reapplication
of the insect repellent-sunscreen drug
products, as directed by the sunscreen
directions, without jeopardizing the
safety of the consumer? How does this
vary by insect repellent ingredient?
Would any of the insect repellent
ingredients be effective at such
concentrations?
4. Is there information available to
show whether there are any chemical or
physical incompatibilities between
insect repellent and sunscreen active
ingredients when used in combination
products or when used separately? Are
there any sunscreen ingredients that
should not be used with a specific
insect repellent ingredient?
5. If an insect repellent ingredient
(e.g., DEET) is labeled for 6-hour
intervals between applications, can the
effectiveness of the sunscreen be
assured if the product cannot be applied
more often than every 6 hours? Is there
a need for a minimal SPF to assure the
effectiveness of the combination
product considering the wide variation
in minimal erythemal dose (MED)
between individuals and the need for
reapplication due to physical stress
such as toweling or rubbing of the skin?
VerDate Aug<31>2005
13:26 Feb 21, 2007
Jkt 211001
7945
If the answer is yes, what minimal SPF
value should be required, and what is
the basis for that SPF value?
6. Is there information available to
demonstrate that there are product
performance benefits [other than the
convenience of using one product
instead of two] derived from the
concurrent application of the insect
repellent and the sunscreen (as opposed
to sequential application of these
products separately)? Please submit any
data that you reference.
7. Oil of Citronella products are
labeled to repeat applications at 1 hour
intervals for maximum repellent
effectiveness. Is it possible that insect
repellent-sunscreen drug products can
be formulated in such a way that the
insect repellent reapplication intervals
coincide more closely with the
sunscreen reapplication intervals? Can
this be done without jeopardizing the
safety or effectiveness of these products?
8. Montemarano, A. D. et al., ‘‘Insect
Repellents and the Efficacy of Sunscreens,’’
The Lancet, 349:1670–1671, 1997.
III. Request for Comments
Interested persons may submit to the
Division of Dockets Management (see
ADDRESSES) written or electronic
comments on this document. Three
copies of all written comments are to be
submitted. Individuals submitting
written comments or anyone submitting
electronic comments may submit one
copy. Comments are to be identified
with the docket number found in
brackets in the heading of this
document and may be accompanied by
a supporting memorandum or brief.
Received comments may be seen in the
Division of Dockets Management
between 9 a.m. and 4 p.m., Monday
through Friday.
Schedules of Controlled Substances:
Placement of Lisdexamfetamine into
Schedule II
IV. References
The following references are on
display in the Division of Dockets
Management (see ADDRESSES) and may
be seen by interested persons between 9
a.m. and 4 p.m., Monday through
Friday.
1. EPA Reregistration Eligibility Decision
for DEET, 1998.
2. EPA Reregistration Eligibility Decision
for Oil of Citronella, 1997.
3. EPA Biopesticide Registration Eligibility
Document for IR3535, 1999.
4. EPA Biopesticide Registration Eligibility
Document for p-menthane-3,8-diol, 2000.
5. EPA Decision Memorandum on KBR
3023, 2000.
6. Ross, E. A. et al., ‘‘Insect Repellent
Interactions: Sunscreens Enhance DEET
(N,N-Diethyl-M-Toluamide) Absorption,’’
Drug Metabolism and Disposition, 32:783–
785, 2004.
7. Gu, X. et al., ‘‘In Vitro Evaluation of
Concurrent Use of Commercially Available
Insect Repellent and Sunscreen
Preparations,’’ British Journal of
Dermatology, 152: 1263–1267, 2005.
PO 00000
Frm 00012
Fmt 4702
Sfmt 4702
This request for information and
comment is issued under sections 201,
501, 502, 503, 505, 510, and 701 of the
Federal Food, Drug, and Cosmetic Act
(21 U.S.C. 321, 351, 352, 353, 355, 360,
and 371) and under authority of the
Commissioner of Food and Drugs.
Dated: December 5, 2006.
Jeffrey Shuren,
Assistant Commissioner for Policy.
[FR Doc. E7–2890 Filed 2–21–07; 8:45 am]
BILLING CODE 4160–01–S
DEPARTMENT OF JUSTICE
Drug Enforcement Administration
[Docket No. DEA–301P]
21 CFR Part 1308
Drug Enforcement
Administration, U.S. Department of
Justice.
ACTION: Notice of proposed rulemaking.
AGENCY:
SUMMARY: This proposed rule is issued
by the Deputy Administrator of the Drug
Enforcement Administration (DEA) to
place the substance lisdexamfetamine,
including its salts, isomers, and salts of
isomers, into schedule II of the
Controlled Substances Act (CSA). This
proposed action is based on a
recommendation from the Assistant
Secretary for Health of the Department
of Health and Human Services (DHHS)
and on an evaluation of the relevant
data by DEA. This scheduling of
lisdexamfetamine in schedule II will not
be finalized until a New Drug
Application (NDA) for a
lisdexamfetamine product is approved
by the Food and Drug Administration
(FDA). If finalized, this action would
impose the regulatory controls and
criminal sanctions of schedule II on
those who handle lisdexamfetamine and
products containing lisdexamfetamine.
DATES: Written comments must be
postmarked, and electronic comments
must be sent, on or before March 26,
2007.
To ensure proper handling
of comments, please reference ‘‘Docket
No. DEA–301’’ on all written and
electronic correspondence. Written
comments sent via regular mail should
be sent to the Deputy Administrator,
Drug Enforcement Administration,
Washington, DC 20537, Attention: DEA
ADDRESSES:
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Agencies
[Federal Register Volume 72, Number 35 (Thursday, February 22, 2007)]
[Proposed Rules]
[Pages 7941-7945]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E7-2890]
=======================================================================
-----------------------------------------------------------------------
DEPARTMENT OF HEALTH AND HUMAN SERVICES
Food and Drug Administration
21 CFR Part 352
[Docket No. 2006N-0479]
RIN 0910-AF43
Insect Repellent-Sunscreen Drug Products for Over-the-Counter
Human Use; Request for Information and Comments
AGENCY: Food and Drug Administration, HHS.
ACTION: Request for data and information.
-----------------------------------------------------------------------
SUMMARY: The Food and Drug Administration (FDA) is seeking information
to formulate a regulatory position on insect repellent products that
contain over-the-counter (OTC) sunscreen ingredients. FDA is
considering amending its monograph for OTC sunscreen drug products (the
regulation that establishes conditions under which these drug products
are generally recognized as safe and effective and not misbranded) to
add conditions for marketing insect repellent-sunscreen drug products.
The insect repellent ingredients in these products are regulated by the
Environmental Protection Agency (EPA). Elsewhere in this issue of the
Federal Register is a companion document in which EPA is also
requesting information and comments on these products. The decision on
what regulations, if any, to propose will be based, in part, on
information and comments submitted in response to this request for data
and information.
DATES: Submit written or electronic comments by May 23, 2007.
ADDRESSES: You may submit comments, identified by Docket No. 2006N-0479
or RIN 0910-AF43, by any of the following methods:
Electronic Submissions
Submit electronic comments in the following ways:
Federal eRulemaking Portal: https://www.regulations.gov.
Follow the instructions for submitting comments.
Agency Web site: https://www.fda.gov/dockets/ecomments.
Follow the instructions for submitting comments on the agency Web site.
Written Submissions
Submit written submissions in the following ways:
FAX: 301-827-6870.
Mail/Hand delivery/Courier [For paper, disk, or CD-ROM
submissions]: Division of Dockets Management (HFA-305), Food and Drug
Administration, 5630 Fishers Lane, rm. 1061, Rockville, MD 20852.
To ensure more timely processing of comments, FDA is no longer
accepting comments submitted to the agency by e-mail. FDA encourages
you to continue to submit electronic comments by using the Federal
eRulemaking Portal or the agency Web site, as described in the
Electronic Submissions portion of this paragraph.
Instructions: All submissions received must include the agency name
and Docket No. and Regulatory Information Number (RIN) for this
rulemaking. All comments received will be posted without change to
https://www.fda.gov/ohrms/dockets/default.htm, including any personal
information provided. For additional information on submitting
comments, see the ``Comments'' heading of the SUPPLEMENTARY INFORMATION
section of this document.
Docket: For access to the docket to read background documents or
comments received, go to https://www.fda.gov/ohrms/dockets/default.htm
and insert the docket number, found in brackets in the heading of this
document, into the ``Search'' box and follow the prompts and/or go to
the Division of Dockets Management, 5630 Fishers Lane, rm. 1061,
Rockville, MD 20852.
FOR FURTHER INFORMATION CONTACT: Matthew R. Holman, Center for Drug
Evaluation and Research, Food and Drug Administration, 10903 New
Hampshire Ave., Bldg. 22, MS 5411, Silver Spring, MD 20993, 301-796-
2090.
SUPPLEMENTARY INFORMATION:
I. Background
A. Description of Insect Repellent-Sunscreen Drug Products
FDA and EPA are seeking information to formulate a regulatory
position for combination insect repellent-sunscreen drug products for
use on human skin. Because sunscreen drug products are regulated by FDA
and the insect repellent components of these products are separately
regulated by EPA, both agencies are seeking comments to
[[Page 7942]]
determine how these combination products should be regulated.
Currently, approximately 20 combination insect repellent-sunscreen
drug products are available for consumers. These products consist of
one of three insect repellents (N,N-diethyl-meta-toluamide (DEET), oil
of citronella, or IR3535) and a sunscreen component (one or more
sunscreen ingredients). Combination insect repellent-sunscreen drug
products are available in lotion, cream, and spray-on formulations and
are currently marketed for use by the entire family. Due to concerns
about the potential conflict in the directions for use and other
labeling requirements for the insect repellent and the sunscreen
components of the product, EPA postponed a regulatory decision on
combination DEET/sunscreen products in its Reregistration Eligibility
Decision (RED) for DEET (December 1998) until additional information
could be obtained. This document solicits opinion and comment from the
public to assist both agencies in regulating these products.
B. Regulatory Status of the Insect Repellent Ingredients
EPA regulates insect repellents under the Federal Insecticide,
Fungicide, and Rodenticide Act (FIFRA). Three insect repellent active
ingredients are currently used in combination with sunscreens: DEET,
oil of citronella, and IR3535. EPA recently registered two other insect
repellents, p-menthane-3,8-diol and picaridin. However, neither is
currently available in combination with a sunscreen. Both DEET and oil
of citronella have undergone reregistration, which entailed an
evaluation and analysis of the complete database for each ingredient by
EPA. IR3535, p-menthane-3,8-diol, and picaridin are registered
chemicals evaluated by the registration process, which involves a
similar analysis by EPA. They have not yet undergone the reregistration
analysis.
1. DEET
In December 1998, EPA completed its RED for DEET (Ref. 1), which
includes the active ingredient N,N-diethyl-meta-toluamide and its
isomers. DEET products, which are applied directly to skin and/or
clothing, are available in numerous formulations (e.g., aerosol and
non-aerosol sprays, creams, lotions, sticks, foams, and towelettes) and
concentrations (products range from about 4 percent to 100 percent
active ingredient). DEET is an insect and mite repellent labeled for
use in households/domestic dwellings, on the human body and clothing,
on cats, dogs, and horses, and in pet living/sleeping quarters.
Based on pesticide usage information mainly for 1990 (Ref. 1), an
average annual estimate of the domestic usage of DEET is 4 million
pounds (active ingredient). About 30 percent of the U.S. population
uses DEET annually as an insect repellent (this figure includes about
27 percent of adult males, 31 percent of adult females, and 34 percent
of children). Approximately 21 percent of U.S. households use DEET
annually. About 19 percent of households use DEET on household members,
and about 4 percent of households that have cats and/or dogs use DEET
on those pets.
EPA indicated in its DEET RED (Ref. 1):
The Agency is concerned about consumer use of products that
combine sunscreen and DEET, since directions to reapply sunscreens
generously and frequently may promote greater use of DEET than
needed for pesticidal efficacy and thus pose unnecessary exposure to
DEET. DEET labels currently recommend that products be used
sparingly and not be reapplied too often. Sunscreen products,
however, recommend frequent reapplication. No benefits attach to use
of DEET more frequently than necessary to achieve its purpose.
EPA did not make a regulatory decision regarding these DEET-
sunscreen products at that time because it believed that it had not yet
obtained adequate information.
2. Oil of Citronella
In February 1997, EPA completed its RED for Oil of Citronella (Ref.
2). This decision includes a comprehensive reassessment of the required
target data and the use patterns of currently registered oil of
citronella products. Oil of citronella is a biochemical pesticide. It
is registered as an animal repellent and as an insect repellent/feeding
depressant. Oil of citronella is the volatile oil obtained from the
steam distillation of freshly cut or partially dried grasses
(Cymbopogon nardus (Rendal) and Cymbopogon winterianus (Jowitt)). Two
varieties of citronella oil exist commercially: ``Ceylon type''
(derived from C. nardus) and ``Java type'' (derived from C.
winterianus).
Based on pesticide survey usage information for 1991 and 1992 (Ref.
2), annual oil of citronella domestic usage ranged approximately from
33,000 to 48,000 pounds active ingredient for four sites: Domestic
dwellings; ornamentals; human face, skin, and clothing; and
manufacturing. The largest markets, in terms of total pounds active
ingredient, for oil of citronella as an insect repellent are: Human
face, skin, and clothing (56 to 74 percent); domestic dwelling
[outdoor] (22 to 41 percent); and ornamentals (1.5 to 2.0 percent). The
balance is used for manufacturing.
In the RED (Ref. 2), EPA required all oil of citronella products
with label claims for repelling mosquitoes, fleas, and ticks to have a
minimum protection time of 1 hour. The directions for use must also
contain the following statement pertaining to maintenance of repellent
activity: ``For maximum repellent effectiveness of this product, repeat
applications at 1 hour intervals.'' The RED allows the labeling to
claim a protection time longer than 1 hour so long as it can be
supported by product performance data showing an acceptable level of
repellent activity. Because the principal uses of oil of citronella are
dermal, special precautionary labeling related to dermal sensitization
and irritation is required for all products with use directions for
dermal application. EPA (Ref. 2) requires oil of citronella-sunscreen
products for dermal application to bear the following precautionary
statements regarding dermal sensitivity: ``For external use only. Avoid
contact with eyes. Discontinue if irritation or rash appears. Use on
children under 6 months of age only with the advice of a physician.''
These precautionary statements are consistent with the warnings and
directions (regarding use on children under 6 months of age) that
appear in FDA's stayed monograph for OTC sunscreen drug products (part
352 (21 CFR part 352)).
3. IR3535
The third currently registered insect repellent used in combination
with a sunscreen is IR3535 (CAS number 52304-36-6). In 1997, EPA
classified IR3535 as a biochemical for the following reasons (Ref. 3):
(1) It is functionally identical to naturally occurring beta-alanine,
(2) both ingredients repel insects, (3) their basic molecular structure
is identical, (4) the end groups are not likely to contribute to
toxicity, and (5) IR3535 acts to control the target pest via a nontoxic
mode of action. IR3535 is a technical grade synthetic biochemical
pesticide that is produced by an integrated process. It is a liquid
containing 98 percent 3-[N-Butyl-N-acetyl]-aminopropionic acid, ethyl
ester as the active ingredient and 2 percent inert ingredients.
4. p-menthane-3,8-diol and KBR 3023
There are two insect repellent active ingredients that are not
currently used in a combination insect repellent-sunscreen drug
product. However, for the purposes of completeness, all
[[Page 7943]]
currently registered insect repellents are discussed within this
document.
The first ingredient is p-menthane-3,8-diol, a biochemical
pesticide that is chemically synthesized, although the natural oil can
be extracted from lemon eucalyptus leaves and twigs (Ref. 4). It can be
used in spray and lotion products to repel insects such as mosquitoes.
The other insect repellent is KBR 3023, which contains the active
ingredient picaridin. This chemical is currently formulated only for
application to human skin. In December 2000, EPA registered a 15
percent pump-spray, 10 percent aerosol spray, 7 percent cream, 7
percent pump-spray, 5 percent cream, and 5 percent pump-spray (Ref. 5).
C. Regulatory Status of the Sunscreen Ingredients
In the Federal Register of May 21, 1999 (64 FR 27666), FDA issued a
final monograph for OTC sunscreen drug products in part 352,
establishing conditions under which these products are generally
recognized as safe and effective and not misbranded. The monograph
includes 16 sunscreen active ingredients in Sec. 352.10; provides for
combinations of sunscreen active ingredients in Sec. 352.20; specifies
required labeling in Sec. Sec. 352.50, 352.52, and 352.60; and sets
forth required testing procedures in Sec. Sec. 352.70 through 352.77.
Once the monograph becomes effective, any drug product (including any
combination insect repellent-sunscreen drug product) that contains
unsuitable inactive ingredients or active drug ingredients that do not
comply with the monograph will be considered a new drug and require an
approved new drug application (NDA) before it may be legally marketed
in the United States.
Initially, the final monograph was to become effective on May 21,
2001, but FDA subsequently extended that date to December 31, 2002 (65
FR 36319, June 8, 2000). FDA then stayed the effective date of the
monograph until further notice (66 FR 67485, December 31, 2001). FDA
has delayed this effective date as it prepares an amendment to part 352
to address formulation, labeling, and testing requirements for
ultraviolet A (UVA) radiation protection and to revise some of the
requirements for ultraviolet B (UVB) radiation protection in a more
comprehensive final monograph.
Historically, FDA has used its enforcement discretion to allow the
marketing of insect repellent-sunscreen drug products pending the
issuance of the final sunscreen monograph so long as the products
contained sunscreen ingredients included in the FDA rulemaking and were
registered with EPA. These types of products were first marketed before
the OTC drug review began in 1972, and FDA has not explicitly addressed
them at any time in the rulemaking for OTC sunscreen drug products.
Because they have always contained a pesticide, the combination insect
repellent-sunscreen products have also historically been registered
with and regulated by EPA.
FDA is now interested in determining whether it should further
amend that monograph to address these combination products. Once the
final monograph for sunscreen drug products becomes effective, any
combination product containing an unsuitable inactive ingredient or an
active drug ingredient that is not included in the final monograph will
be considered a new drug and need an NDA to be legally marketed, even
if the product is also registered with EPA. Thus, one purpose of this
document is to gather information to help FDA formulate its regulatory
position toward these combination products.
D. Regulatory Jurisdiction Over Insect Repellent-Sunscreen Drug
Products
In the Federal Register of December 22, 1971 (36 FR 24234), the
Department of Health, Education, and Welfare (DHEW) and EPA published a
Memorandum of Agreement (the Agreement) regarding matters of mutual
responsibility under the Federal Food, Drug, and Cosmetic Act (FFDCA)
and the FIFRA. The Agreement was amended in the Federal Register of
September 6, 1973 (38 FR 24233). This Agreement does not explicitly
address products that combine sunscreen and insect repellent active
ingredients. As noted, one purpose of this document is to solicit
comments regarding the complexities of joint jurisdiction of these
combination products.
II. Information Requested and Specific Topics for Comment
Interested persons are asked to review and comment upon all aspects
of both FDA's and EPA's documents. Interested persons should submit all
comments to both agencies. Both agencies have potential safety and
effectiveness concerns for some of these products because of the
different intervals of time required or recommended between
applications of sunscreens versus insect repellents. FDA is
particularly interested in receiving comments on the following topics:
A. Possible Manufacturing Conflicts
Because they contain ingredients regulated by EPA and FDA, all
insect repellent-sunscreen drug products currently need to comply with
both EPA's testing and laboratory requirements in 40 CFR part 158 and
FDA's current good manufacturing practice for finished pharmaceuticals
requirements in part 211 (21 CFR part 211). The products will also have
to meet the testing procedures for OTC sunscreen drug products in part
352, subpart D, when that monograph becomes effective. The agencies are
not aware of any specific manufacturing requirements that conflict and
invite specific comment and information on this subject.
1. Are manufacturers of insect repellent-sunscreen drug products or
others aware of any conflicts between the EPA and FDA manufacturing
requirements for these products? If yes, is there any way to resolve
the conflict(s)?
2. Approximately 20 insect repellent-sunscreen drug products are
currently registered with EPA. If there is a future FDA rulemaking for
all combination insect repellent-sunscreen drug products, how should
these currently registered products be addressed in the sunscreen
monograph? What requirements should be retained, revised, or eliminated
from the sunscreen monograph?
3. Have manufacturers of currently marketed insect repellent-
sunscreen drug products conducted any of the testing described in part
352, subpart D, for their combination product(s), notwithstanding that
the effective date of part 352 has been stayed? If yes, what problems,
if any, have they encountered?
B. Possible Formulation Conflicts
During completion of its DEET RED, EPA solicited information from
registrants of insect repellent-sunscreen drug products on the
possibility of formulation conflicts. At that time, EPA received
information that suggests a potential formulation conflict is
encountered when sunscreen and insect repellent are used separately (or
sequentially applied) (Ref. 6). It is unclear whether this formulation
issue poses a similar or related problem when these ingredients are
combined into a single product. The agencies invite specific comment
and information on this subject.
C. Possible Labeling Conflicts
Insect repellent and sunscreen products each have different
labeling
[[Page 7944]]
requirements that may conflict when both are combined and packaged in
one product. The insect repellent component is subject to the labeling
requirements in 40 CFR 156.10 entitled ``labeling requirements and the
active ingredient specific requirements.'' For each registered insect
repellent, these requirements are listed in the registration or
reregistration documents. The sunscreen component of the product is
subject to the labeling requirements in Sec. 201.66 (21 CFR 201.66)
and part 352. However, FDA has stayed these regulations for OTC
sunscreen drug products until we issue a sunscreen final rule (69 FR
53801 (September 3, 2004) and 66 FR 67485).
The agencies are concerned that the labeling format and some of the
content requirements vary between the EPA and FDA requirements. For
example, FDA uses the word ``warning'' on labels, while EPA uses the
word ``caution'' and only uses the word ``warning'' as an indicator of
toxicity level on pesticide labels. Many of the required warning
section headings are also different. In addition, the application
directions for the sunscreen and the insect repellent components may be
significantly different. For example, the application directions for
sunscreens state to ``apply liberally (or generously) * * * as needed''
and provide for application to more areas of the body than do the
application instructions for insect repellents, which tend to restrict
the frequency of application and where and how the product can be
applied.
EPA requirements for DEET include labeling that states: ``Apply
sparingly around ears.'' and ``Do not apply to children's hands.'' The
directions for some DEET products require a 6-hour interval between
applications and state: ``Use just enough repellent to cover exposed
skin and/or clothing'' and ``avoid over-application of this product.''
Also, a currently marketed insect repellent (DEET)-sunscreen drug
product states in its labeling ``frequent reapplication and saturation
is unnecessary for effectiveness.'' While frequent reapplication may
not be necessary for the effectiveness of the DEET in this product,
frequent reapplication may be necessary for the effectiveness of the
sunscreen.
Hence, there are many differences between the labeling required by
FDA for OTC drugs and EPA for pesticides. The labeling formats,
labeling content, and the order in which information is presented are
quite different. FDA and EPA are exploring whether they can reconcile
these differences, safeguard the public health, and still adequately
meet the requirements of FFDCA and FIFRA.
1. Concerning an integrated label, can the different instructions
for the two components (regarding frequency of application and where
the product can be applied) be reconciled into a single direction that
does not lead to improper application (i.e., incorrect location), over-
application of the insect repellent, or under-application of the
sunscreen? Is there labeling that would reflect the differences in
reapplication intervals for DEET when combined with sunscreen
ingredients? Oil of citronella when combined with sunscreen
ingredients? IR3535 when combined with sunscreen ingredients?
2. The FFDCA requires that all OTC drug products list the
established name of each inactive ingredient on the outside container
of the retail package (see section 502(e)(1)(A)(iii) of FFDCA (21
U.S.C. 352(e)(1)(A)(iii)); also see Sec. 201.66(c)(8)). EPA does not
require a complete declaration of ``inactive or inert'' ingredients and
normally does not require insect repellent manufacturers to list the
identities of inert ingredients on product labels. However, under
FIFRA, if one inert ingredient is disclosed in product labeling, then
all inert ingredients must be disclosed. EPA is currently discussing,
with a wide spectrum of stakeholders, how to make information
concerning inert ingredients more widely available. The results of
those discussions will affect combination insect repellent-sunscreen
drug products as well as other pesticide products. Failure to list all
of the inactive ingredients in the product's labeling, including all
such ingredients in the insect repellent, would cause a combination
insect repellent-sunscreen drug product to be misbranded under the
FFDCA (see section 502(e)(1)(A)(iii) of FFDCA). Is there a way to label
combination sunscreen-insect repellent drug products that satisfies
FFDCA's requirements under section 502(e)(1)(A) of FFDCA but does not
violate FIFRA? Are those ingredients that are ``inert'' under FIFRA
also necessarily ``inactive'' under FFDCA?
D. Safety Issues
FDA is aware of only two studies examining percutaneous absorption
when combining an insect repellent with a sunscreen. One study involved
hairless mice (Ref. 6) and the other study involved piglets (Ref. 7).
Both studies demonstrate increased absorption of the insect repellent
DEET and different sunscreens when the components were combined. Thus,
FDA would like more information concerning the safety of insect
repellent-sunscreen drug products:
1. Is there data available to show whether increased absorption of
the sunscreen ingredients(s) does or does not occur as a result of
being combined with an insect repellent ingredient? If so, please
provide. For example, is there any evidence that absorption increases
as the particle size of titanium dioxide and zinc oxide decreases (down
to a few nanometers) in insect repellent-sunscreen products? If so, is
there evidence regarding the health or safety effects associated with
the increased absorption?
2. Are there reports or other information relating to skin
irritation resulting from use of a combination insect repellent-
sunscreen drug product are manufacturers of these products or others
aware of? Provide a summary of the types of events reported and, if
possible, estimate an incidence of occurrence.
E. Effectiveness Issues
For some insect repellent-sunscreen products, FDA has effectiveness
concerns because of the interval of time required or recommended
between applications of the product. EPA identifies reapplication times
on insect repellent labels so consumers can maintain the maximum
protection against insect bites but avoid over-exposure. This
reapplication time relates to the effectiveness of the insect repellent
portion of the product and not to the sunscreen protection. The
directions for sunscreen products, which encourage frequent
reapplication of the drug, relate to the effectiveness of the sunscreen
component of the product and not to the insect repellent component.
The differences in directions for use for the insect repellent
component and the sunscreen component need to be resolved to ensure
safety and effectiveness of both components and the combination product
as a whole. For example, the directions for some products containing
DEET require a 6-hour interval between applications and state ``use
just enough repellent to cover exposed skin and/or clothing'' and
``avoid over-application of this product.'' In contrast, the directions
for sunscreen drug products in Sec. 352.52(d)(1) and (d)(2) state to
``apply liberally, generously, smoothly, or evenly * * * before sun
exposure and as needed,'' and ``reapply as needed or after towel
drying, swimming, or (select `sweating' or `perspiring').'' Section
352.60(d) of the sunscreen monograph also states that ``when the time
intervals or age limitations for administration of
[[Page 7945]]
the individual ingredients differ, the directions for the combination
product may not contain any dosage that exceeds those established for
any individual ingredient in the applicable OTC drug monograph(s), and
may not provide for use by any age group lower than the highest minimum
age limit established for any individual ingredient.''
Concerns about effectiveness also stem from a study (Ref. 8)
indicating that separate application of sunscreen followed by DEET
resulted in a decrease in sun protection factor (SPF) after application
of the insect repellent. Thus, FDA is soliciting comment on the
following questions:
1. Is there additional evidence suggesting that application of a
sunscreen product followed by application of a separate insect
repellent product results in a decrease in the sunscreen's SPF? Is
there evidence suggesting that sequential application of the products
has no adverse effect on the sunscreen?
2. Is there evidence suggesting that combining a sunscreen and
insect repellent in a single formulation adversely impacts the
effectiveness of the sunscreen? Is there evidence suggesting that such
a combination has no adverse impact on the sunscreen component?
3. Are there effective concentrations of the insect repellent
ingredients that could be used to allow for liberal application and
frequent reapplication of the insect repellent-sunscreen drug products,
as directed by the sunscreen directions, without jeopardizing the
safety of the consumer? How does this vary by insect repellent
ingredient? Would any of the insect repellent ingredients be effective
at such concentrations?
4. Is there information available to show whether there are any
chemical or physical incompatibilities between insect repellent and
sunscreen active ingredients when used in combination products or when
used separately? Are there any sunscreen ingredients that should not be
used with a specific insect repellent ingredient?
5. If an insect repellent ingredient (e.g., DEET) is labeled for 6-
hour intervals between applications, can the effectiveness of the
sunscreen be assured if the product cannot be applied more often than
every 6 hours? Is there a need for a minimal SPF to assure the
effectiveness of the combination product considering the wide variation
in minimal erythemal dose (MED) between individuals and the need for
reapplication due to physical stress such as toweling or rubbing of the
skin? If the answer is yes, what minimal SPF value should be required,
and what is the basis for that SPF value?
6. Is there information available to demonstrate that there are
product performance benefits [other than the convenience of using one
product instead of two] derived from the concurrent application of the
insect repellent and the sunscreen (as opposed to sequential
application of these products separately)? Please submit any data that
you reference.
7. Oil of Citronella products are labeled to repeat applications at
1 hour intervals for maximum repellent effectiveness. Is it possible
that insect repellent-sunscreen drug products can be formulated in such
a way that the insect repellent reapplication intervals coincide more
closely with the sunscreen reapplication intervals? Can this be done
without jeopardizing the safety or effectiveness of these products?
III. Request for Comments
Interested persons may submit to the Division of Dockets Management
(see ADDRESSES) written or electronic comments on this document. Three
copies of all written comments are to be submitted. Individuals
submitting written comments or anyone submitting electronic comments
may submit one copy. Comments are to be identified with the docket
number found in brackets in the heading of this document and may be
accompanied by a supporting memorandum or brief. Received comments may
be seen in the Division of Dockets Management between 9 a.m. and 4
p.m., Monday through Friday.
IV. References
The following references are on display in the Division of Dockets
Management (see ADDRESSES) and may be seen by interested persons
between 9 a.m. and 4 p.m., Monday through Friday.
1. EPA Reregistration Eligibility Decision for DEET, 1998.
2. EPA Reregistration Eligibility Decision for Oil of
Citronella, 1997.
3. EPA Biopesticide Registration Eligibility Document for
IR3535, 1999.
4. EPA Biopesticide Registration Eligibility Document for p-
menthane-3,8-diol, 2000.
5. EPA Decision Memorandum on KBR 3023, 2000.
6. Ross, E. A. et al., ``Insect Repellent Interactions:
Sunscreens Enhance DEET (N,N-Diethyl-M-Toluamide) Absorption,'' Drug
Metabolism and Disposition, 32:783-785, 2004.
7. Gu, X. et al., ``In Vitro Evaluation of Concurrent Use of
Commercially Available Insect Repellent and Sunscreen
Preparations,'' British Journal of Dermatology, 152: 1263-1267,
2005.
8. Montemarano, A. D. et al., ``Insect Repellents and the
Efficacy of Sunscreens,'' The Lancet, 349:1670-1671, 1997.
This request for information and comment is issued under sections
201, 501, 502, 503, 505, 510, and 701 of the Federal Food, Drug, and
Cosmetic Act (21 U.S.C. 321, 351, 352, 353, 355, 360, and 371) and
under authority of the Commissioner of Food and Drugs.
Dated: December 5, 2006.
Jeffrey Shuren,
Assistant Commissioner for Policy.
[FR Doc. E7-2890 Filed 2-21-07; 8:45 am]
BILLING CODE 4160-01-S