Topical and oral preparations of nicotinamide (the amide form of vitamin B3) have been suggested as alternative medical treatments.[134] It is thought to improve acne due to its anti-inflammatory properties, its ability to suppress sebum production, and by promoting wound healing.[134] Topical and oral preparations of zinc have similarly been proposed as effective treatments for acne; evidence to support their use for this purpose is limited.[135] The purported efficacy of zinc is attributed to its capacity to reduce inflammation and sebum production, and inhibit P. acnes.[135] Antihistamines may improve symptoms among those already taking isotretinoin due to their anti-inflammatory properties and their ability to suppress sebum production.[136]

Acne treatment that you apply to the skin: Most acne treatments are applied to the skin. Your dermatologist may call this topical treatment. There are many topical acne treatments. Some topicals help kill the bacteria. Others work on reducing the oil. The topical medicine may contain a retinoid, prescription-strength benzoyl peroxide, antibiotic, or even salicylic acid. Your dermatologist will determine what you need.