ADVERSE REACTIONS The skin of certain sensitive individuals may become excessively red, edematous, blistered, or crusted. If these effects occur, the medication should either be discontinued until the integrity of the skin is restored, or the medication dosing frequency should be adjusted temporarily to a level the patient can tolerate. However, efficacy has not been established for lower dosing frequencies. True contact allergy to topical tretinoin is rarely encountered. Temporary hyper- or hypopigmentation has been reported with repeated application of tretinoin cream. Some individuals have been reported to have heightened susceptibility to sunlight while under treatment with tretinoin cream. Adverse effects of tretinoin cream have been reversible upon discontinuation of therapy (see DOSAGE AND ADMINISTRATION section).