Here's How Long It Takes For Acne Products to Work — and When to Kick Them to the Curb

So your skin is on the up and up? Breathe a sigh of relief, but don't stop using the product. "Even if a patient sees a clearance within a very short period of time, it is important to continue to use your acne medications for the full month, or until your follow-up appointment with your dermatologist," Dr. Fusco said. Bottom line: keep the course.