Retin-A: Tretinoin is used to treat certain types of acne.0.1% Each gram of cream contains 0.1% tretinoin in a bland, hydrophilic base. Nonmedicinal ingredients: butylated hydroxytoluene, isopropyl myristate, polyoxyl (40) stearate, purified water, sorbic acid, stearic acid, stearyl alcohol, and...