I suffered from a severe break-out of cystic acne. The previous dermatologist had me on antibiotics that reduced the breakouts. This required on-going dosages of tetracycline, amoxycillin and erythromycin. If I went off, I broke out again. Dr. Chin examined me and provided me with enough samples of topical medications so I could go through the treatment cycle before purchasing the products. It took a few weeks but the medications worked. I now maintain a clear complexion through regular check-ups and updates to the regimen. Sometimes the office is very crowded since they take walk-ins. Be patient. It's worth waiting. Call before you go to make sure he's in the office that day.