Credit: Getty Images. The Food and Drug Administration (FDA) has approved Twyneo ® (tretinoin 0.1% and benzoyl peroxide 3%) cream for the topical treatment of acne vulgaris in patients 9 years of age and older. Twyneo is a fixed-dose combination of tretinoin 0.1%, a retinoid, and benzoyl peroxide 3%, a topical antibacterial. The formulation of Twyneo uses silica core shell structures to separately microencapsulate tretinoin crystals and benzoyl peroxide crystals enabling inclusion of the 2 active ingredients in the cream. “Twyneo combines, for the first time, 2 of the most...