skip to main content

Acne vulgaris — USMLE Step 3 MCQ

Instant feedback + full explanation. One question, done properly.

ModerateAmbulatory Medicine / Primary CareAcne vulgarisUSMLE Step 3

A 17-year-old girl returns 8 weeks after starting topical benzoyl peroxide for mild inflammatory acne. Lesions have improved by 30%, but she still has comedones and papules on the forehead and cheeks. She is not pregnant and has no scarring. Which of the following would you recommend at the follow-up visit?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: A — Add a topical retinoid

Comedonal and mild inflammatory acne is treated with topical retinoid plus benzoyl peroxide; isotretinoin is reserved for severe or refractory disease.

Reference: American Academy of Dermatology acne guideline: https://www.aad.org/