35+ 1 Week Benzoyl Peroxide Before And After Background. The most common side effect is skin irritation. Topical tretinoin and benzoyl peroxide are commonly used to treat acne, but many alternate the two medications for the first two weeks.

Side effects of benzoyl peroxide treatments.

Before using this medication, tell your doctor or pharmacist if you are allergic to. Benzoyl peroxide is an effective acne treatment but doesn't come without drawbacks. Before using this medication, tell your doctor or pharmacist if you are allergic to. Benzoyl peroxide (bp) is an organic compound and antibacterial ingredient used in acne medications.