Tretinoin Cream USP, 0.1% is used for the topical treatment of acne vulgaris. Tretinoin Cream contains tretinoin in 0.1% by weight, in a hydrophilic cream vehicle of butylated hydroxytoluene, isopropyl myristate, polyoxyl stearate type II, purified water, sorbic acid, stearic acid, stearyl alcohol and xanthan gum. Chemically, tretinoin is all-trans-retinoic acid and has the following structure: