Adapalene

INDICATIONS AND USAGE: Adapalene cream is indicated for the topical treatment of acne vulgaris.

DOSAGE AND ADMINISTRATION: Adapalene cream should be applied to affected areas of the skin, once daily at nighttime. A thin film of the cream should be applied to the skin areas where acne lesions appear, using enough to cover the entire affected area lightly. A mild transitory sensation of warmth or slight stinging may occur shortly after the application of adapalene cream.

ADVERSE REACTIONS: In controlled clinical trials, local cutaneous irritation was monitored in 285 acne patients who used adapalene cream once daily for 12 weeks. The frequency and severity of erythema, scaling, dryness, pruritus and burning were assessed during these studies. The incidence of local cutaneous irritation with adapalene cream from the controlled clinical studies is provided in the following table: Incidence of Local Cutaneous Irritation with Adapalene Cream from Controlled Clinical Studies (N=285) None Mild Moderate Severe Erythema 52% (148) 38% (108) 10% (28) <1% (1) Scaling 58% (166) 35% (100) 6% (18) <1% (1) Dryness 48% (136) 42% (121) 9% (26) <1% (2) Pruritus (persistent) 74% (211) 21% (61) 4% (12) <1% (1) Burning/Stinging (persistent) 71% (202) 24% (69) 4% (12) <1% (2) Other reported local cutaneous adverse events in patients who used adapalene cream once daily included: sunburn (2%), skin discomfort-burning and stinging (1%) and skin irritation (1%). Events occurring in less than 1% of patients treated with adapalene cream included: acne flare, dermatitis and contact dermatitis, eyelid edema, conjunctivitis, erythema, pruritus, skin discoloration, rash, and eczema.

Pharmacokinetics: Absorption of adapalene from adapalene cream through human skin is low. In a pharmacokinetic study with six acne patients treated once daily for 5 days with 2 grams of adapalene cream applied to 1000 cm 2 of acne involved skin, there were no quantifiable amounts (limit of quantification = 0.35 ng/mL) of adapalene in the plasma samples from any patient. Excretion appears to be primarily by the biliary route.