DIFFERIN® Gel, containing adapalene, is used for the topical treatment of acne vulgaris. Each gram of DIFFERIN® Gel contains adapalene 0.1% (1 mg) in a vehicle consisting of carbomer 940, edetate disodium, methylparaben, poloxamer 182, propylene glycol, purified water and sodium hydroxide. May contain hydrochloric acid to adjust pH.

The chemical name of adapalene is 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid. Adapalene is a white to off-white powder which is soluble in tetrahydrofuran, sparingly soluble in ethanol, and practically insoluble in water. The molecular formula is C₂₈H₂₈O₃ and molecular weight is 412.52. Adapalene is represented by the following structural formula:

SIDE EFFECTS: A brief sensation of warmth or stinging may occur immediately after applying the medication. Skin redness, dryness, itching, scaling, mild burning, or worsening of acne may occur during the first 2-4 weeks of using the medication. These effects usually decrease with continued use. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. Your doctor may want you to decrease how often you use adapalene, change the strength, or have you stop using it.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor immediately if any of these unlikely but serious side effects occur: very red/irritated skin, an intense burning sensation, eye redness and watering (conjunctivitis), eyelid swelling, skin discoloration.

A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction may include: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

PRECAUTIONS: Before using adapalene, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: eczema.

This medication may make you more sensitive to the sun. Avoid prolonged sun exposure, tanning booths, and sunlamps. Weather extremes such as wind or cold may also be irritating to the skin. Use a sunscreen daily and wear protective clothing when outdoors. Wait until your skin has completely recovered from a sunburn before using adapalene.

Avoid electrolysis, waxing and chemical depilatories for hair removal on the treated areas while using this product.

If you have recently used products containing sulfur, resorcinol or salicylic acid, use adapalene with caution. Wait until the effects of such products on the skin have decreased before using adapalene.

This medication should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor.

It is not known whether this drug passes into breast milk. Consult your doctor before breast-feeding.