Tretinoin is a drug that is prescribed for treating acne. This medicine is prescribed for peeling off the affected skin areas and also for unclogging the pores. Tretinoin is a natural metabolite of retinol and belongs to a class of Retinoids. Tretinoin is available in many other forms apart from capsules, like gel and cream form. This medication is used to minimize the signs and severity of the disease, Acne.