Patch test before first use. Stop use and consult a doctor if severe irritation, swelling or allergic reaction occurs. Avoid use on eczematous, sunburnt or broken skin. Increased sun sensitivity may occur—use broad-spectrum sunscreen and limit sun exposure. If using other acne actives (retinoids, benzoyl peroxide, other acids), use cautiously to avoid excessive dryness/irritation. Keep out of reach of children.