Tretinoin (Retin A); Anti-acne; Cream: 0.02% [40 gm], 0.025% [20, 45 gm], 0.05% [20, 45, 60 gm], 0.1% [20, 45 gm]
Gel: 0.01% [15, 45 mL], 0.025% [15, 20, 45 mL], 0.04% [20, 45 mL], 0.1% [20, 45 mL]
Liq: 0.05% [28 mL]; Wash and dry face, then apply to affected area qhs
Side effects include local redness and photosensitivity.