ADVERSE REACTIONS SECTION.

6 ADVERSE REACTIONS. The most frequently reported (>= 1%) adverse reactions were dry skin, skin discomfort, pruritus, desquamation, and sunburn. 6.1) To report SUSPECTED ADVERSE REACTIONS, contact Galderma Laboratories, L.P. at 1-866-735-4137 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience. Because clinical trials are conducted under widely varying conditions, adverse reactions rates observed in the clinical trials of drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. In the multi-center, controlled clinical trial, signs and symptoms of local cutaneous irritation were monitored in 258 acne patients who used DIFFERIN Gel, 0.3% once daily for 12 weeks. Of the patients who experienced cutaneous irritation (erythema, scaling, dryness, and/or burning/stinging), the majority of cases were mild to moderate in severity, occurred early in treatment and decreased thereafter. The incidence of local cutaneous irritation with DIFFERIN Gel, 0.3% from the controlled clinical study is provided in the following table:Table 1: Physician assessed local cutaneous irritation with DIFFERIN GelIncidence of Local Cutaneous Irritation with DIFFERIN Gel, 0.3%from Controlled Clinical Trials(N 253)Maximum Severity Scores Higher Than Baseline MildModerateSevereErythema66 (26.1%)33 (13.0%)1 (0.4%)Scaling110 (43.5%)47 (18.6%)3 (1.2%)Dryness113 (44.7%)43 (17.0%)2 (0.8%)Burning/Stinging72 (28.5%)36 (14.2%)9 (3.6%) Total number of subjects with local cutaneous data for at least one post-Baseline evaluationTable 2: Patient reported local cutaneous reactions with DIFFERIN GelDIFFERIN (adapalene) Gel, 0.3%Vehicle GelN 258N 134Related Adverse Reactions Dry Skin Skin Discomfort Desquamation57 (22.1%)36 (14%)15 (5.8%)4 (1.6%)6 (4.5%)2 (1.5%)0 (0%)0 (0%) Selected adverse reactions defined by investigator as Possibly, Probably or Definitely Related Related adverse reactions from the controlled clinical trial that occurred in greater than 1% of patients who used DIFFERIN Gel, 0.3% once daily included: dry skin (14.0%), skin discomfort (5.8%), pruritus (1.9%), desquamation (1.6%), and sunburn (1.2%). The following selected adverse reactions occurred in less than 1% of patients: acne flare, contact dermatitis, eyelid edema, conjunctivitis, erythema, pruritus, skin discoloration, rash, and eczema.In one-year, open-label safety study of 551 patients with acne who received DIFFERIN Gel, 0.3%, the pattern of adverse reactions was similar to the 12-week controlled study.. 6.2 Post-Marketing Experience. The following adverse reactions have been identified during post approval use of adapalene: skin irritation, application site pain, face edema, eyelid edema, lip swelling, and angioedema. Because these reactions are reported voluntarily from population of uncertain size, it is not always possible to reliably estimate the frequency or establish causal relationship to drug exposure.

CARCINOGENESIS & MUTAGENESIS & IMPAIRMENT OF FERTILITY SECTION.

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility. Carcinogenicity studies with adapalene have been conducted in mice at topical doses of 0.4, 1.3, and 4.0 mg/kg/day, and in rats at oral doses of 0.15, 0.5, and 1.5 mg/kg/day. These doses are up to times (mice) and times (rats) in terms of mg/m2/day the potential exposure at the maximum recommended human dose (MRHD), assumed to be 2.5 grams DIFFERIN Gel, 0.3%. In the oral study, increased incidence of benign and malignant pheochromocytomas in the adrenal medullas of male rats was observed.No photocarcinogenicity studies were conducted. Animal studies have shown an increased risk of skin neoplasms with the use of pharmacologically similar drugs (e.g., retinoids) when exposed to UV irradiation in the laboratory or to sunlight. Although the significance of these studies to human use is not clear, patients should be advised to avoid or minimize exposure to either sunlight or artificial UV irradiation sources.Adapalene did not exhibit mutagenic or genotoxic effects in vitro (Ames test, Chinese hamster ovary cell assay, mouse lymphoma TK assay) and in vivo (mouse micronucleus test).Reproductive function and fertility studies were conducted in rats administered oral doses of adapalene in amounts up to 20 mg/kg/day (up to 26 times the MRHD based on mg/m2 comparisons). No effects of adapalene were found on the reproductive performance or fertility of the F0 males or females. There were also no detectable effects on the growth, development and subsequent reproductive function of the F1 offspring.

CLINICAL PHARMACOLOGY SECTION.

12 CLINICAL PHARMACOLOGY. 12.1 Mechanism of Action. Adapalene binds to specific retinoic acid nuclear receptors but does not bind to cytosolic receptor protein. Biochemical and pharmacological profile studies have demonstrated that adapalene is modulator of cellular differentiation, keratinization, and inflammatory processes. However, the significance of these findings with regard to the mechanism of action of adapalene for the treatment of acne is unknown.. 12.2 Pharmacodynamics. Clinical pharmacodynamic studies have not been conducted for Differin Gel, 0.3%.. 12.3 Pharmacokinetics. Systemic exposure of adapalene following topical application of DIFFERIN Gel was evaluated in clinical study. Sixteen acne patients were treated once daily for 10 days with grams of DIFFERIN Gel, 0.3% applied to the face, chest and back, corresponding to approximately mg/cm2. Fifteen patients had quantifiable (LOQ 0.1 ng/mL) adapalene levels resulting in mean Cmax of 0.553 +- 0.466 ng/mL on Day 10 of treatment. The mean AUC0-24hr was 8.37 +- 8.46 ng.h/mL as determined in 15 of the 16 patients on Day 10. The terminal apparent half-life, determined in 15 of 16 patients, ranged from to 51 hours, with mean of 17.2 +- 10.2 hours. Adapalene was rapidly cleared from plasma and was not detected 72 hours after the last application for all but one subject. Exposure of potential circulating metabolites of adapalene was not measured. Excretion of adapalene appears to be primarily by the biliary route.In another clinical study in patients with moderate to moderately severe acne, DIFFERIN (adapalene) Gel, 0.3% or Adapalene Gel, 0.1% was applied to the face and optionally to the trunk, once daily for 12 weeks. Seventy-eight (78) patients had plasma adapalene levels evaluated at Weeks 2, 8, and 12. Of the 209 plasma samples analyzed, adapalene concentrations were below the limit of detection (LOD 0.15 ng/mL) of the method in all samples but three. For the three samples, traces of adapalene below the limit of quantification (LOQ 0.25 ng/mL) of the method were found. One of these samples was taken at Week 12 from male patient treated with DIFFERIN Gel, 0.3% who treated the face and the trunk for eight weeks (thereafter, only the face was treated). The second and third samples were from the Week and 12 visits of female patient treated with Adapalene Gel, 0.1% who treated only the face for 12 weeks. In this study, the average daily usage of product was g/day.

CLINICAL STUDIES SECTION.

14 CLINICAL STUDIES. The safety and efficacy of once daily use of DIFFERIN Gel, 0.3% for treatment of acne vulgaris were assessed in one 12 week, multi-center, controlled, clinical study, conducted in total of 653 patients 12 to 52 years of age with acne vulgaris of mild to moderate severity. All female patients of child-bearing potential enrolled in the study were required to have negative urine pregnancy test at the beginning of the study and were required to practice highly effective method of contraception during the study. Female patients who were pregnant, nursing or planning to become pregnant were excluded from the study.Patients enrolled in the study were Caucasian (72%), Hispanic (12%), African-American (10%), Asian (3%), and other (2%). An equal number of males (49.5%) and females (50.5%) enrolled. Success was defined as Clear or Almost Clear in the Investigators Global Assessment (IGA). The success rate, mean reduction, and percent reduction in acne lesion counts from Baseline after 12 weeks of treatment are presented in the following table:Table 3: Clinical study primary efficacy results at Week 12DIFFERIN(adapalene)Gel, 0.3% AdapaleneGel, 0.1% VehicleGelN 258N 261N 134IGA Success Rate53 (21%)41 (16%)12 (9%)Inflammatory Lesions Mean Baseline Count Mean Absolute (%) Reduction27.714.4 (51.6%)28.113.9 (49.7%)27.211.2 (40.7%)Non-Inflammatory Lesions Mean Baseline Count Mean Absolute (%) Reduction39.416.3 (39.7%)41.015.2 (35.2%)40.010.3 (27.2%)Total Lesions Mean Baseline Count Mean Absolute (%) Reduction67.130.6 (45.3%)69.129.0 (41.8%)67.221.4 (33.7%).

CONTRAINDICATIONS SECTION.

4 CONTRAINDICATIONS. DIFFERIN Gel, 0.3% should not be administered to individuals who are hypersensitive to adapalene or any of the components in the gel vehicle.. DIFFERIN Gel, 0.3% should not be administered to individuals who are hypersensitive to adapalene or any of the components in the gel vehicle. (4).

DESCRIPTION SECTION.

11 DESCRIPTION. DIFFERIN (adapalene) Gel, 0.3% contains adapalene 0.3% (3 mg/g) in topical aqueous gel for use in the treatment of acne vulgaris, consisting of carbomer 940, edetate disodium, methylparaben, poloxamer 124, propylene glycol, purified water, and sodium hydroxide. May contain hydrochloric acid for pH adjustment.The chemical name of adapalene is 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid. It is white to off-white powder, which is soluble in tetrahydrofuran, very slightly soluble in ethanol, and practically insoluble in water. The molecular formula is C28H28O3 and molecular weight is 412.53. Adapalene is represented by the following structural formula.. adapalence chem struct.

DOSAGE & ADMINISTRATION SECTION.

2 DOSAGE AND ADMINISTRATION. Apply thin film of DIFFERIN Gel, 0.3% to the entire face and any other affected areas of the skin once daily in the evening, after washing gently with non-medicated soap. Avoid application to the areas of skin around eyes, lips, and mucous membranes. mild transitory sensation of warmth or slight stinging may occur shortly after the application of DIFFERIN Gel, 0.3%. Patients should be instructed to minimize sun exposure. Patients may be instructed to use moisturizers for relief of dry skin or irritation.If therapeutic results are not noticed after 12 weeks of treatment, therapy should be re-evaluated.For topical use only. Not for ophthalmic, oral or intravaginal use.. Apply thin film of DIFFERIN Gel, 0.3% to the entire face and any other affected areas of the skin once daily in the evening, after washing gently with non-medicated soap. (2) For topical use only. Not for ophthalmic, oral or intravaginal use. (2).

DOSAGE FORMS & STRENGTHS SECTION.

3 DOSAGE FORMS AND STRENGTHS. Each gram of DIFFERIN Gel, 0.3% contains mg adapalene in an off-white aqueous gel.. Each gram of DIFFERIN Gel, 0.3% contains mg adapalene in an off-white aqueous gel. (3).

DRUG INTERACTIONS SECTION.

7 DRUG INTERACTIONS. 7.1 Concomitant Topical MedicationsAs DIFFERIN Gel, 0.3% has the potential to induce local irritation in some patients, concomitant use of other potentially irritating topical products (medicated or abrasive soaps and cleansers, soaps and cosmetics that have strong drying effect, and products with high concentrations of alcohol, astringents, spices, or lime) should be approached with caution. Particular caution should be exercised in using preparations containing sulfur, resorcinol, or salicylic acid in combination with DIFFERIN Gel, 0.3%. If these preparations have been used, it is advisable not to start therapy with DIFFERIN Gel, 0.3%, until the effects of such preparations have subsided.No formal drug-drug interaction studies were conducted with DIFFERIN Gel, 0.3%.. As DIFFERIN Gel has the potential to induce local irritation in some patients, concomitant use of other potentially irritating topical products (medicated or abrasive soaps and cleansers, soaps and cosmetics that have strong drying effect, and products with high concentrations of alcohol, astringents, spices, or lime) should be approached with caution. Use with caution, especially when using preparations containing sulfur, resorcinol, or salicylic acid in combination with DIFFERIN Gel. (7).

GERIATRIC USE SECTION.

8.5 Geriatric Use. Clinical studies of DIFFERIN Gel, 0.3% did not include subjects 65 years of age and older to determine whether they respond differently than younger subjects. Safety and effectiveness in geriatric patients age 65 and above have not been established.

HOW SUPPLIED SECTION.

16 HOW SUPPLIED/ STORAGE AND HANDLING. DIFFERIN Gel, 0.3% is supplied in the following size.15 tube NDC 0299-5918-1545 tube NDC 0299-5918-4545 pump NDC 0299-5918-25Storage: Store at controlled room temperature 68 to 77F (20 to 25C) with excursions permitted between 59 to 86F (15 to 30C). Protect from freezing. Keep out of reach of children.

INDICATIONS & USAGE SECTION.

1 INDICATIONS AND USAGE. DIFFERIN Gel, 0.3% is indicated for the topical treatment of acne vulgaris in patients 12 years of age and older.. DIFFERIN Gel, 0.3%, is retinoid, indicated for the topical treatment of acne vulgaris in patients 12 years of age and older. (1).

INFORMATION FOR PATIENTS SECTION.

17 PATIENT COUNSELING INFORMATION. See FDA-approved patient labeling (Patient Information). Information for PatientsPatients using DIFFERIN Gel, 0.3%, should receive the following information and instructions:This medication is to be used only as directed by the physician.Do not use more than the recommended amount and do not apply more than once daily as this will not produce faster results, but may increase irritation.Apply thin film of DIFFERIN Gel, 0.3% to the entire face and any other affected areas of the skin once daily in the evening, after washing gently with non-medicated soap.Avoid contact with the eyes, lips, angles of the nose, and mucous membranes.Moisturizers may be used if necessary; however, products containing alpha hydroxy or glycolic acids should be avoided.Exposure of the eye to this medication may result in reactions such as swelling, conjunctivitis, and eye irritation.This medication should not be applied to cuts, abrasions, eczematous, or sunburned skin.Wax depilation should not be performed on treated skin due to the potential for skin erosions.Minimize exposure to sunlight including sunlamps. Recommend the use of sunscreen products and protective apparel (e.g., hat) when exposure cannot be avoided.During the early weeks of therapy, an apparent exacerbation of acne may occur. This may be due to the action of the medication on previously unseen lesions and should not be considered reason to discontinue therapy.Contact the doctor if skin rash, pruritus, hives, chest pain, edema, and shortness of breath occurs, as these may be signs of allergy or hypersensitivity.It is for external use only.Marketed by:GALDERMA LABORATORIES, L.P.Fort Worth, Texas 76177 USAManufactured by:G Production Inc.Baie dUrfe, QC, H9X 3S4 CanadaMade in CanadaGALDERMA is registered trademark.P52321-0Or (only one manufacturer will be listed as appropriate)Manufactured by:DPT Laboratories, Ltd.San Antonio, Texas 78215 USAGALDERMA is registered trademark.. This medication is to be used only as directed by the physician.. Do not use more than the recommended amount and do not apply more than once daily as this will not produce faster results, but may increase irritation.. Apply thin film of DIFFERIN Gel, 0.3% to the entire face and any other affected areas of the skin once daily in the evening, after washing gently with non-medicated soap.. Avoid contact with the eyes, lips, angles of the nose, and mucous membranes.. Moisturizers may be used if necessary; however, products containing alpha hydroxy or glycolic acids should be avoided.. Exposure of the eye to this medication may result in reactions such as swelling, conjunctivitis, and eye irritation.. This medication should not be applied to cuts, abrasions, eczematous, or sunburned skin.. Wax depilation should not be performed on treated skin due to the potential for skin erosions.. Minimize exposure to sunlight including sunlamps. Recommend the use of sunscreen products and protective apparel (e.g., hat) when exposure cannot be avoided.. During the early weeks of therapy, an apparent exacerbation of acne may occur. This may be due to the action of the medication on previously unseen lesions and should not be considered reason to discontinue therapy.. Contact the doctor if skin rash, pruritus, hives, chest pain, edema, and shortness of breath occurs, as these may be signs of allergy or hypersensitivity.. It is for external use only.. Patient InformationDIFFERIN(R) [Dif-er-in](adapalene)Gel 0.3%Important: For use on the skin only (topical). Do not use DIFFERIN Gel, 0.3% in or on your mouth, eyes, or vagina.Read this Patient Information that comes with DIFFERIN Gel, 0.3% before you start using it and each time you get refill. There may be new information. This leaflet does not take the place of talking with your doctor about your treatment or your medical condition. If you have any questions about DIFFERIN Gel, 0.3%, talk with your doctor or pharmacist.What is DIFFERIN Gel, 0.3%DIFFERIN Gel, 0.3% is prescription medicine for skin use only (topical) used to treat acne vulgaris in people 12 years of age and older. Acne vulgaris is condition in which the skin has blackheads, whiteheads and pimples. It is not known if DIFFERIN Gel, 0.3% is safe and effective in children younger than 12 years of age or in people 65 years of age and older.Who should not use DIFFERIN Gel, 0.3%Do not use DIFFERIN Gel, 0.3% if you:are allergic to adapalene or any of the ingredients in DIFFERIN Gel, 0.3%. See the end of this Patient Information for complete list of ingredients in DIFFERIN Gel.What should tell my doctor before using DIFFERIN Gel, 0.3%Before you use DIFFERIN Gel, 0.3%, tell your doctor if you:have other skin problems, including cuts or sunburnhave any other medical conditionsare pregnant or planning to become pregnant. It is not known if DIFFERIN Gel, 0.3% can harm your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant.are breastfeeding or plan to breastfeed. It is not known if DIFFERIN Gel, 0.3% passes into your breast milk and if it can harm your baby. Talk to your doctor about the best way to feed your baby if you use DIFFERIN Gel, 0.3%.Tell your doctor about all the medicines you take, including prescription and nonprescription medicines, vitamins and herbal supplements.Especially tell your doctor if you use any other medicine for acne. Using DIFFERIN Gel, 0.3% with topical medicines that contain sulfur, resorcinol or salicylic acid may cause skin irritation.Know the medicines you take. Keep list of them to show your doctor and pharmacist when you get new medicine.How should use DIFFERIN Gel, 0.3%Use DIFFERIN Gel, 0.3% exactly as your doctor tells you to use it. DIFFERIN Gel, 0.3% is for skin use only. Do not use DIFFERIN Gel, 0.3% in or on your mouth, eyes, or vagina.Apply DIFFERIN Gel, 0.3% time day. Do not use more DIFFERIN Gel, 0.3% than you need to cover the treatment area. Using too much DIFFERIN Gel, 0.3% or using it more than time day may increase your chance of skin irritation.Applying DIFFERIN Gel, 0.3%:Wash the area where DIFFERIN Gel, 0.3% will be applied with soap that does not contain medicine and pat dry.DIFFERIN Gel, 0.3% comes in tube and pump. If you have been prescribed the:- Tube: Squeeze small amount onto your fingertips and spread thin layer over the entire face and any other affected areas.- Pump: Depress the pump to dispense small amount of DIFFERIN Gel, 0.3% and spread thin layer over the entire face and any other affected area.What should avoid while using DIFFERIN Gel, 0.3%You should avoid spending time in sunlight or artificial sunlight, such as tanning beds or sunlamps. DIFFERIN Gel, 0.3% can make your skin sensitive to sun and the light from tanning beds and sunlamps. You should wear sunscreen and wear hat and clothes that cover the areas treated with DIFFERIN Gel, 0.3% if you have to be in sunlight.You should avoid weather extremes such as wind and cold as this may cause irritation to your skin.You should avoid applying DIFFERIN Gel, 0.3% to cuts, abrasions and sunburned skin.You should avoid skin products that may dry or irritate your skin such as harsh soaps, astringents, cosmetics that have strong skin drying effects and products containing high levels of alcohol.You should avoid the use of waxing as hair removal method on skin treated with DIFFERIN Gel, 0.3%.What are the possible side effects of DIFFERIN Gel, 0.3%DIFFERIN Gel, 0.3% may cause serious side effects including:- Local skin reactions. Local skin reactions are most likely to happen during the first weeks of treatment and usually lessen with continued use of DIFFERIN Gel, 0.3%. Signs and symptoms of local skin reaction include:RednessDrynessScalingStinging or burning- Allergic reactions. DIFFERIN Gel, 0.3% may cause an allergic reaction that may require medical treatment. Stop using DIFFERIN Gel, 0.3% and tell your doctor right away if you have any of these symptoms of an allergic reaction:skin rash, itching or hivestrouble breathing or chest painswelling of your face, eyes, lips, tongue or throatYou may use moisturizer for relief of dry skin or irritation, however you should avoid products that contain alpha hydroxy or glycolic acid.The most common side effects of DIFFERIN Gel, 0.3% are:skin painskin peelingsunburnTell your doctor if you have any side effect that bothers you or that does not go away.These are not all the possible side effects of DIFFERIN Gel, 0.3%. For more information, ask your doctor or pharmacist.Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.You may also report side effects to GALDERMA LABORATORIES, L.P. at 1-866-735-4137.How should store DIFFERIN Gel, 0.3%Store DIFFERIN Gel, 0.3% at room temperature between 68 to 77 (20 to 25 C).Do not freeze DIFFERIN Gel, 0.3%.Keep DIFFERIN Gel, 0.3% and all medicines out of the reach of children.General information about DIFFERIN Gel, 0.3%Medicines are sometimes prescribed for purposes other than those listed in Patient Information Leaflet. Do not use DIFFERIN Gel, 0.3% for condition for which it was not prescribed. Do not give DIFFERIN Gel, 0.3% to other people, even if they have the same symptoms you have. It may harm them.This Patient Information leaflet summarizes the most important information about DIFFERIN Gel, 0.3%. If you would like more information, talk with your doctor. You can also ask your doctor or pharmacist for information about DIFFERIN Gel, 0.3% that is written for health professionals.What are the ingredients in DIFFERIN Gel, 0.3%Active ingredient: adapaleneInactive ingredients: carbomer 940, edetate disodium, methylparaben, poloxamer 124, propylene glycol, purified water and sodium hydroxide. May contain hydrochloric acid for pH adjustment.This Patient Information has been approved by the U.S. Food and Drug Administration.Marketed by:GALDERMA LABORATORIES, L.P., Fort Worth, Texas 76177 USAManufactured by:G Production Inc., Baie dUrfe, QC, H9X 3S4 CanadaMade in Canada.GALDERMA is registered trademark.P52321-0Or (only one manufacturer will be listed as appropriate)Manufactured by:DPT Laboratories, Ltd.San Antonio, Texas 78215 USAGalderma is registered trademark.Issued: 12/2013. are allergic to adapalene or any of the ingredients in DIFFERIN Gel, 0.3%. See the end of this Patient Information for complete list of ingredients in DIFFERIN Gel.. have other skin problems, including cuts or sunburn. have any other medical conditions. are pregnant or planning to become pregnant. It is not known if DIFFERIN Gel, 0.3% can harm your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant.. are breastfeeding or plan to breastfeed. It is not known if DIFFERIN Gel, 0.3% passes into your breast milk and if it can harm your baby. Talk to your doctor about the best way to feed your baby if you use DIFFERIN Gel, 0.3%.. Use DIFFERIN Gel, 0.3% exactly as your doctor tells you to use it. DIFFERIN Gel, 0.3% is for skin use only. Do not use DIFFERIN Gel, 0.3% in or on your mouth, eyes, or vagina.. Apply DIFFERIN Gel, 0.3% time day. Do not use more DIFFERIN Gel, 0.3% than you need to cover the treatment area. Using too much DIFFERIN Gel, 0.3% or using it more than time day may increase your chance of skin irritation.. Wash the area where DIFFERIN Gel, 0.3% will be applied with soap that does not contain medicine and pat dry.. DIFFERIN Gel, 0.3% comes in tube and pump. If you have been prescribed the:. You should avoid spending time in sunlight or artificial sunlight, such as tanning beds or sunlamps. DIFFERIN Gel, 0.3% can make your skin sensitive to sun and the light from tanning beds and sunlamps. You should wear sunscreen and wear hat and clothes that cover the areas treated with DIFFERIN Gel, 0.3% if you have to be in sunlight.. You should avoid weather extremes such as wind and cold as this may cause irritation to your skin.. You should avoid applying DIFFERIN Gel, 0.3% to cuts, abrasions and sunburned skin.. You should avoid skin products that may dry or irritate your skin such as harsh soaps, astringents, cosmetics that have strong skin drying effects and products containing high levels of alcohol.. You should avoid the use of waxing as hair removal method on skin treated with DIFFERIN Gel, 0.3%.. Redness. Dryness. Scaling. Stinging or burning. skin rash, itching or hives. trouble breathing or chest pain. swelling of your face, eyes, lips, tongue or throat. skin pain. skin peeling. sunburn. Store DIFFERIN Gel, 0.3% at room temperature between 68 to 77 (20 to 25 C).. Do not freeze DIFFERIN Gel, 0.3%.

MECHANISM OF ACTION SECTION.

12.1 Mechanism of Action. Adapalene binds to specific retinoic acid nuclear receptors but does not bind to cytosolic receptor protein. Biochemical and pharmacological profile studies have demonstrated that adapalene is modulator of cellular differentiation, keratinization, and inflammatory processes. However, the significance of these findings with regard to the mechanism of action of adapalene for the treatment of acne is unknown.

NONCLINICAL TOXICOLOGY SECTION.

13 NONCLINICAL TOXICOLOGY. 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility. Carcinogenicity studies with adapalene have been conducted in mice at topical doses of 0.4, 1.3, and 4.0 mg/kg/day, and in rats at oral doses of 0.15, 0.5, and 1.5 mg/kg/day. These doses are up to times (mice) and times (rats) in terms of mg/m2/day the potential exposure at the maximum recommended human dose (MRHD), assumed to be 2.5 grams DIFFERIN Gel, 0.3%. In the oral study, increased incidence of benign and malignant pheochromocytomas in the adrenal medullas of male rats was observed.No photocarcinogenicity studies were conducted. Animal studies have shown an increased risk of skin neoplasms with the use of pharmacologically similar drugs (e.g., retinoids) when exposed to UV irradiation in the laboratory or to sunlight. Although the significance of these studies to human use is not clear, patients should be advised to avoid or minimize exposure to either sunlight or artificial UV irradiation sources.Adapalene did not exhibit mutagenic or genotoxic effects in vitro (Ames test, Chinese hamster ovary cell assay, mouse lymphoma TK assay) and in vivo (mouse micronucleus test).Reproductive function and fertility studies were conducted in rats administered oral doses of adapalene in amounts up to 20 mg/kg/day (up to 26 times the MRHD based on mg/m2 comparisons). No effects of adapalene were found on the reproductive performance or fertility of the F0 males or females. There were also no detectable effects on the growth, development and subsequent reproductive function of the F1 offspring.

NURSING MOTHERS SECTION.

8.3 Nursing Mothers. It is not known whether adapalene is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when DIFFERIN Gel, 0.3% is administered to nursing woman.

OVERDOSAGE SECTION.

10 OVERDOSAGE. DIFFERIN Gel, 0.3% is intended for topical use only. If the medication is applied excessively, no more rapid or better results will be obtained and marked redness, scaling, or skin discomfort may occur. Chronic ingestion of the drug may lead to the same side effects as those associated with excessive oral intake of vitamin A.

PACKAGE LABEL.PRINCIPAL DISPLAY PANEL.

PACKAGE LABEL 45 PUMP. Rx onlyNDC 0299-5918-25Differin(R) 0.3(adapalene) Gel, 0.3%PUMPFOR TOPICAL USE ONLYNET WT. 45 gGaldermaFor topical use only. Not for ophthalmic, oral, or intravaginal use.Usual dosage: apply thin film once day at nighttime to affected areas. See package insert for complete prescribing information.Each gram contains: adapalene 0.3% (3 mg) in an aqueous gel consisting of carbomer 940, edetate disodium, methylparaben, poloxamer 124, propylene glycol, purified water, and sodium hydroxide. May contain hydrochloric acid for pH adjustment.Storage: Store at controlled room temperature 68 to 77F (20 to 25C) with excursions permitted between 59 to 86F (15 to 30C). Protect from freezing.See carton closure for lot number and expiration date.Marketed by:GALDERMA LABORATORIES, L.P.Fort Worth, TX 76177 USAMade in CanadaAll trademarks are the property of their respective owners. www.differin.com P51959-4.

PEDIATRIC USE SECTION.

8.4 Pediatric Use. Safety and effectiveness have not been established in pediatric patients below the age of 12.

PHARMACODYNAMICS SECTION.

12.2 Pharmacodynamics. Clinical pharmacodynamic studies have not been conducted for Differin Gel, 0.3%.

PHARMACOKINETICS SECTION.

12.3 Pharmacokinetics. Systemic exposure of adapalene following topical application of DIFFERIN Gel was evaluated in clinical study. Sixteen acne patients were treated once daily for 10 days with grams of DIFFERIN Gel, 0.3% applied to the face, chest and back, corresponding to approximately mg/cm2. Fifteen patients had quantifiable (LOQ 0.1 ng/mL) adapalene levels resulting in mean Cmax of 0.553 +- 0.466 ng/mL on Day 10 of treatment. The mean AUC0-24hr was 8.37 +- 8.46 ng.h/mL as determined in 15 of the 16 patients on Day 10. The terminal apparent half-life, determined in 15 of 16 patients, ranged from to 51 hours, with mean of 17.2 +- 10.2 hours. Adapalene was rapidly cleared from plasma and was not detected 72 hours after the last application for all but one subject. Exposure of potential circulating metabolites of adapalene was not measured. Excretion of adapalene appears to be primarily by the biliary route.In another clinical study in patients with moderate to moderately severe acne, DIFFERIN (adapalene) Gel, 0.3% or Adapalene Gel, 0.1% was applied to the face and optionally to the trunk, once daily for 12 weeks. Seventy-eight (78) patients had plasma adapalene levels evaluated at Weeks 2, 8, and 12. Of the 209 plasma samples analyzed, adapalene concentrations were below the limit of detection (LOD 0.15 ng/mL) of the method in all samples but three. For the three samples, traces of adapalene below the limit of quantification (LOQ 0.25 ng/mL) of the method were found. One of these samples was taken at Week 12 from male patient treated with DIFFERIN Gel, 0.3% who treated the face and the trunk for eight weeks (thereafter, only the face was treated). The second and third samples were from the Week and 12 visits of female patient treated with Adapalene Gel, 0.1% who treated only the face for 12 weeks. In this study, the average daily usage of product was g/day.

PREGNANCY SECTION.

8.1 Pregnancy. Teratogenic effects. Pregnancy Category C. Retinoids may cause fetal harm, when administered to pregnant women. Adapalene has been shown to be teratogenic in rats and rabbits when administered orally (see Animal Data below). There are no adequate and well-controlled studies in pregnant women. DIFFERIN Gel, 0.3% should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus. The safety and efficacy of DIFFERIN Gel, 0.3% in pregnancy has not been established.Human DataIn clinical trials involving DIFFERIN Gel, 0.3% in the treatment of acne vulgaris, women of child-bearing potential initiated treatment only after having had negative pregnancy test and used effective birth control measures during therapy. However, women treated with DIFFERIN Gel, 0.3% became pregnant. One patient elected to terminate the pregnancy, two patients delivered healthy babies by normal delivery, two patients delivered prematurely and the babies remained in intensive care until reaching healthy state and one patient was lost to follow-up.Animal DataNo teratogenic effects were seen in rats at oral doses of 0.15 to 5.0 mg/kg/day adapalene representing up to times the maximum recommended human dose (MRHD) based on mg/m2 comparisons. Adapalene has been shown to be teratogenic in rats and rabbits when administered orally at doses >= 25 mg/kg representing 32 and 65 times, respectively, the MRHD based on mg/m2 comparisons. Findings included cleft palate, microphthalmia, encephalocele and skeletal abnormalities in the rat and umbilical hernia, exophthalmos and kidney and skeletal abnormalities in the rabbit. Cutaneous teratology studies in rats and rabbits at doses of 0.6, 2.0, and 6.0 mg/kg/day exhibited no fetotoxicity and only minimal increases in supernumerary ribs in both species and delayed ossification in rabbits. Systemic exposure (AUC0-24h) to adapalene 0.3% gel at topical doses of 6.0 mg/kg/day in rats and rabbits represented 5.7 and 28.7 times, respectively, the exposure in acne patients treated with adapalene 0.3% gel applied to the face, chest and back (2 grams applied to 1000 cm2 of acne involved skin). No teratogenic effects were seen in rats at oral doses of 0.15 to 5.0 mg/kg/day adapalene representing up to times the maximum recommended human dose (MRHD) based on mg/m2 comparisons. Adapalene has been shown to be teratogenic in rats and rabbits when administered orally at doses >= 25 mg/kg representing 32 and 65 times, respectively, the MRHD based on mg/m2 comparisons. Findings included cleft palate, microphthalmia, encephalocele and skeletal abnormalities in the rat and umbilical hernia, exophthalmos and kidney and skeletal abnormalities in the rabbit. Cutaneous teratology studies in rats and rabbits at doses of 0.6, 2.0, and 6.0 mg/kg/day exhibited no fetotoxicity and only minimal increases in supernumerary ribs in both species and delayed ossification in rabbits. Systemic exposure (AUC0-24h) to adapalene 0.3% gel at topical doses of 6.0 mg/kg/day in rats and rabbits represented 5.7 and 28.7 times, respectively, the exposure in acne patients treated with adapalene 0.3% gel applied to the face, chest and back (2 grams applied to 1000 cm2 of acne involved skin).

SPL UNCLASSIFIED SECTION.

5.1 Ultraviolet Light and Environmental Exposure. Exposure to sunlight, including sunlamps, should be minimized during use of DIFFERIN Gel, 0.3%. Patients who normally experience high levels of sun exposure, and those with inherent sensitivity to sun, should be warned to exercise caution. Use of sunscreen products and protective clothing over treated areas is recommended when exposure cannot be avoided. Weather extremes, such as wind or cold, also may be irritating to patients under treatment with DIFFERIN Gel, 0.3%.

USE IN SPECIFIC POPULATIONS SECTION.

8 USE IN SPECIFIC POPULATIONS. 8.1 Pregnancy. Teratogenic effects. Pregnancy Category C. Retinoids may cause fetal harm, when administered to pregnant women. Adapalene has been shown to be teratogenic in rats and rabbits when administered orally (see Animal Data below). There are no adequate and well-controlled studies in pregnant women. DIFFERIN Gel, 0.3% should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus. The safety and efficacy of DIFFERIN Gel, 0.3% in pregnancy has not been established.Human DataIn clinical trials involving DIFFERIN Gel, 0.3% in the treatment of acne vulgaris, women of child-bearing potential initiated treatment only after having had negative pregnancy test and used effective birth control measures during therapy. However, women treated with DIFFERIN Gel, 0.3% became pregnant. One patient elected to terminate the pregnancy, two patients delivered healthy babies by normal delivery, two patients delivered prematurely and the babies remained in intensive care until reaching healthy state and one patient was lost to follow-up.Animal DataNo teratogenic effects were seen in rats at oral doses of 0.15 to 5.0 mg/kg/day adapalene representing up to times the maximum recommended human dose (MRHD) based on mg/m2 comparisons. Adapalene has been shown to be teratogenic in rats and rabbits when administered orally at doses >= 25 mg/kg representing 32 and 65 times, respectively, the MRHD based on mg/m2 comparisons. Findings included cleft palate, microphthalmia, encephalocele and skeletal abnormalities in the rat and umbilical hernia, exophthalmos and kidney and skeletal abnormalities in the rabbit. Cutaneous teratology studies in rats and rabbits at doses of 0.6, 2.0, and 6.0 mg/kg/day exhibited no fetotoxicity and only minimal increases in supernumerary ribs in both species and delayed ossification in rabbits. Systemic exposure (AUC0-24h) to adapalene 0.3% gel at topical doses of 6.0 mg/kg/day in rats and rabbits represented 5.7 and 28.7 times, respectively, the exposure in acne patients treated with adapalene 0.3% gel applied to the face, chest and back (2 grams applied to 1000 cm2 of acne involved skin). No teratogenic effects were seen in rats at oral doses of 0.15 to 5.0 mg/kg/day adapalene representing up to times the maximum recommended human dose (MRHD) based on mg/m2 comparisons. Adapalene has been shown to be teratogenic in rats and rabbits when administered orally at doses >= 25 mg/kg representing 32 and 65 times, respectively, the MRHD based on mg/m2 comparisons. Findings included cleft palate, microphthalmia, encephalocele and skeletal abnormalities in the rat and umbilical hernia, exophthalmos and kidney and skeletal abnormalities in the rabbit. Cutaneous teratology studies in rats and rabbits at doses of 0.6, 2.0, and 6.0 mg/kg/day exhibited no fetotoxicity and only minimal increases in supernumerary ribs in both species and delayed ossification in rabbits. Systemic exposure (AUC0-24h) to adapalene 0.3% gel at topical doses of 6.0 mg/kg/day in rats and rabbits represented 5.7 and 28.7 times, respectively, the exposure in acne patients treated with adapalene 0.3% gel applied to the face, chest and back (2 grams applied to 1000 cm2 of acne involved skin). 8.3 Nursing Mothers. It is not known whether adapalene is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when DIFFERIN Gel, 0.3% is administered to nursing woman.. 8.4 Pediatric Use. Safety and effectiveness have not been established in pediatric patients below the age of 12.. 8.5 Geriatric Use. Clinical studies of DIFFERIN Gel, 0.3% did not include subjects 65 years of age and older to determine whether they respond differently than younger subjects. Safety and effectiveness in geriatric patients age 65 and above have not been established.

WARNINGS AND PRECAUTIONS SECTION.

5 WARNINGS AND PRECAUTIONS. Ultraviolet Light and Environmental Exposure: Avoid exposure to sunlight and sunlamps. Wear sunscreen when sun exposure cannot be avoided. (5.1) Erythema, scaling, dryness, and stinging/burning were reported with use of DIFFERIN Gel. (5.2). 5.1 Ultraviolet Light and Environmental Exposure. Exposure to sunlight, including sunlamps, should be minimized during use of DIFFERIN Gel, 0.3%. Patients who normally experience high levels of sun exposure, and those with inherent sensitivity to sun, should be warned to exercise caution. Use of sunscreen products and protective clothing over treated areas is recommended when exposure cannot be avoided. Weather extremes, such as wind or cold, also may be irritating to patients under treatment with DIFFERIN Gel, 0.3%.. 5.2 Local Cutaneous Reactions. Certain cutaneous signs and symptoms of treatment such as erythema, scaling, dryness, and stinging/burning were reported with use of DIFFERIN Gel, 0.3%. These were most likely to occur during the first four weeks of treatment, were mostly mild to moderate in intensity, and usually lessened with continued use of the medication. Depending upon the severity of these side effects, patients should be instructed to either use moisturizer, reduce the frequency of application of DIFFERIN Gel, 0.3% or discontinue use.Avoid contact with the eyes, lips, angles of the nose, and mucous membranes. The product should not be applied to cuts, abrasions, eczematous or sunburned skin. As with other retinoids, use of waxing as depilatory method should be avoided on skin treated with adapalene.As DIFFERIN Gel has the potential to induce local irritation in some patients, concomitant use of other potentially irritating topical products (medicated or abrasive soaps and cleansers, soaps and cosmetics that have strong drying effect and products with high concentrations of alcohol, astringents, spices, or lime) should be approached with caution.. 5.3 Allergic/ Hypersensitivity Reactions. Reactions characterized by symptoms such as pruritus, face edema, eyelid edema, and lip swelling, requiring medical treatment have been reported during postmarketing use of adapalene. patient should stop using DIFFERIN Gel, 0.3% and consult doctor if experiencing allergic or anaphylactoid/anaphylactic reactions (e.g., skin rash, pruritus, hives, chest pain, edema, and shortness of breath) during treatment.

LABOR & DELIVERY SECTION.

8.2 Lactation. Risk SummaryThere are no data on the presence of topical adapalene gel or its metabolite in human milk, the effects on the breastfed infant, or the effects on milk production. In animal studies, adapalene is present in rat milk with oral administration of the drug. When drug is present in animal milk, it is likely that the drug will be present in human milk. It is possible that topical administration of large amounts of adapalene could result in sufficient systemic absorption to produce detectable quantities in human milk (see Clinical Considerations). The developmental and health benefits of breastfeeding should be considered along with the mothers clinical need for DIFFERIN Gel and any potential adverse effects on the breastfed child from DIFFERIN Gel, or from the underlying maternal condition. Clinical Considerations To minimize potential exposure to the breastfed infant via breastmilk, use DIFFERIN Gel on the smallest area of skin and for the shortest duration possible while breastfeeding. Avoid application of DIFFERIN Gel to areas with increased risk for potential ingestion by or ocular exposure to the breastfeeding child.

SPL PATIENT PACKAGE INSERT SECTION.

Patient Information. DIFFERIN(R) [Dif-er-in] (adapalene) GelImportant: For use on the skin only (topical). Do not use DIFFERIN Gel in or on your mouth, eyes, or vagina.Read this Patient Information that comes with DIFFERIN Gel before you start using it and each time you get refill. There may be new information. This leaflet does not take the place of talking with your doctor about your treatment or your medical condition. If you have any questions about DIFFERIN Gel talk with your doctor or pharmacist.What is DIFFERIN GelDIFFERIN Gel is prescription medicine for skin use only (topical) used to treat acne vulgaris in people 12 years of age and older. Acne vulgaris is condition in which the skin has blackheads, whiteheads and pimples. It is not known if DIFFERIN Gel is safe and effective in children younger than 12 years of age or in people 65 years of age and older.Who should not use DIFFERIN Gel Do not use DIFFERIN Gel if you:are allergic to adapalene or any of the ingredients in DIFFERIN Gel. See the end of this Patient Information for complete list of ingredients in DIFFERIN Gel.What should tell my doctor before using DIFFERIN GelBefore you use DIFFERIN Gel, tell your doctor if you:have other skin problems, including cuts or sunburnhave any other medical conditionsare pregnant or planning to become pregnant. It is not known if DIFFERIN Gel, can harm your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnantare breastfeeding or plan to breastfeed. It is not known if DIFFERIN Gel passes into your breast milk and if it can harm your baby. Talk to your doctor about the best way to feed your baby if you use DIFFERIN Gel.Tell your doctor about all the medicines you take, including prescription and nonprescription medicines, vitamins and herbal supplements.Especially tell your doctor if you use any other medicine for acne. Using DIFFERIN Gel with topical medicines that contain sulfur, resorcinol or salicylic acid may cause skin irritation.Know the medicines you take. Keep list of them to show your doctor and pharmacist when you get new medicine.How should use DIFFERIN GelUse DIFFERIN Gel exactly as your doctor tells you to use it. DIFFERIN Gel is for skin use only. Do not use DIFFERIN Gel in or on your mouth, eyes, or vagina.Apply DIFFERIN Gel time day. Do not use more DIFFERIN Gel than you need to cover the treatment area. Using too much DIFFERIN Gel or using it more than time day may increase your chance of skin irritation.Applying DIFFERIN Gel:Wash the area where DIFFERIN Gel will be applied with soap that does not contain medicine and pat dry.DIFFERIN Gel comes in tube and pump. If you have been prescribed the:Tube: Squeeze small amount onto your fingertips and spread thin layer over the entire face and any other affected areas. Pump: Depress the pump to dispense small amount of DIFFERIN Gel and spread thin layer over the entire face and any other affected area. What should avoid while using DIFFERIN GelYou should avoid spending time in sunlight or artificial sunlight, such as tanning beds or sunlamps. DIFFERIN Gel can make your skin sensitive to sun and the light from tanning beds and sunlamps. You should wear sunscreen and wear hat and clothes that cover the areas treated with DIFFERIN Gel if you have to be in sunlight.You should avoid weather extremes such as wind and cold as this may cause irritation to your skin.You should avoid applying DIFFERIN Gel to cuts, abrasions and sunburned skin.You should avoid skin products that may dry or irritate your skin such as harsh soaps, astringents, cosmetics that have strong skin drying effects and products containing high levels of alcohol.You should avoid the use of waxing as hair removal method on skin treated with DIFFERIN Gel.What are the possible side effects of DIFFERIN Gel DIFFERIN Gel may cause serious side effects including:Local skin reactions. Local skin reactions are most likely to happen during the first weeks of treatment and usually lessen with continued use of DIFFERIN Gel. Signs and symptoms of local skin reaction include:RednessDrynessScalingStinging or burning Allergic reactions. DIFFERIN Gel may cause an allergic reaction that may require medical treatment. Stop using DIFFERIN Gel and tell your doctor right away if you have any of these symptoms of an allergic reaction:skin rash, itching or hivestrouble breathing or chest painswelling of your face, eyes, lips, tongue or throat You may use moisturizer for relief of dry skin or irritation, however you should avoid products that contain alpha hydroxy or glycolic acid.The most common side effects of DIFFERIN Gel are:skin painskin peelingsunburnTell your doctor if you have any side effect that bothers you or that does not go away. These are not all the possible side effects of DIFFERIN Gel. For more information, ask your doctor or pharmacist. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. You may also report side effects to GALDERMA LABORATORIES, L.P. at 1-866-7354137. How should store DIFFERIN GelStore DIFFERIN Gel, 0.3% at room temperature between 68 to 77 (20 to 25 C).Do not freeze DIFFERIN Gel.Keep DIFFERIN Gel and all medicines out of the reach of children.General information about DIFFERIN Gel Medicines are sometimes prescribed for purposes other than those listed in Patient Information Leaflet. Do not use DIFFERIN Gel for condition for which it was not prescribed. Do not give DIFFERIN Gel to other people, even if they have the same symptoms you have. It may harm them.This Patient Information leaflet summarizes the most important information about DIFFERIN Gel. If you would like more information, talk with your doctor. You can also ask your doctor or pharmacist for information about DIFFERIN Gel that is written for health professionals.What are the ingredients in DIFFERIN GelActive ingredient: adapalene Inactive ingredients: carbomer 940, edetate disodium, methylparaben, poloxamer 124, propylene glycol, purified water and sodium hydroxide. May contain hydrochloric acid for pH adjustment.This Patient Information has been approved by the U.S. Food and Drug Administration.Marketed by: GALDERMA LABORATORIES, L.P., Dallas, Texas 75201 USA Manufactured by: Production Inc., Baie dUrfe, QC, H9X 3S4 Canada Made in Canada. All trademarks are the property of their respective owners.P52321-X Issued: 08/2022. are allergic to adapalene or any of the ingredients in DIFFERIN Gel. See the end of this Patient Information for complete list of ingredients in DIFFERIN Gel.. have other skin problems, including cuts or sunburn. have any other medical conditions. are pregnant or planning to become pregnant. It is not known if DIFFERIN Gel, can harm your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. are breastfeeding or plan to breastfeed. It is not known if DIFFERIN Gel passes into your breast milk and if it can harm your baby. Talk to your doctor about the best way to feed your baby if you use DIFFERIN Gel.. Use DIFFERIN Gel exactly as your doctor tells you to use it. DIFFERIN Gel is for skin use only. Do not use DIFFERIN Gel in or on your mouth, eyes, or vagina.. Apply DIFFERIN Gel time day. Do not use more DIFFERIN Gel than you need to cover the treatment area. Using too much DIFFERIN Gel or using it more than time day may increase your chance of skin irritation.. Wash the area where DIFFERIN Gel will be applied with soap that does not contain medicine and pat dry.. DIFFERIN Gel comes in tube and pump. If you have been prescribed the:Tube: Squeeze small amount onto your fingertips and spread thin layer over the entire face and any other affected areas. Pump: Depress the pump to dispense small amount of DIFFERIN Gel and spread thin layer over the entire face and any other affected area. Tube: Squeeze small amount onto your fingertips and spread thin layer over the entire face and any other affected areas. Pump: Depress the pump to dispense small amount of DIFFERIN Gel and spread thin layer over the entire face and any other affected area.. You should avoid spending time in sunlight or artificial sunlight, such as tanning beds or sunlamps. DIFFERIN Gel can make your skin sensitive to sun and the light from tanning beds and sunlamps. You should wear sunscreen and wear hat and clothes that cover the areas treated with DIFFERIN Gel if you have to be in sunlight.. You should avoid weather extremes such as wind and cold as this may cause irritation to your skin.. You should avoid applying DIFFERIN Gel to cuts, abrasions and sunburned skin.. You should avoid skin products that may dry or irritate your skin such as harsh soaps, astringents, cosmetics that have strong skin drying effects and products containing high levels of alcohol.. You should avoid the use of waxing as hair removal method on skin treated with DIFFERIN Gel.. Local skin reactions. Local skin reactions are most likely to happen during the first weeks of treatment and usually lessen with continued use of DIFFERIN Gel. Signs and symptoms of local skin reaction include:RednessDrynessScalingStinging or burning Redness. Dryness. Scaling. Stinging or burning. Allergic reactions. DIFFERIN Gel may cause an allergic reaction that may require medical treatment. Stop using DIFFERIN Gel and tell your doctor right away if you have any of these symptoms of an allergic reaction:skin rash, itching or hivestrouble breathing or chest painswelling of your face, eyes, lips, tongue or throat skin rash, itching or hives. trouble breathing or chest pain. swelling of your face, eyes, lips, tongue or throat. skin pain. skin peeling. sunburn. Store DIFFERIN Gel, 0.3% at room temperature between 68 to 77 (20 to 25 C).. Do not freeze DIFFERIN Gel.