"it is kind of insane how well and how quickly clindamycin worked on my acne. i  typically have very clear skin, but while on another medication, had an acne breakout as a side effect. it was pretty bad.   in a couple days of using this, it cleared. i don&#039;t need it or use it daily. however, i have gotten prescriptions filled  anytime i feel like my skin is being oversensitive or a small l pimple shows up and i am showing signs of a break out and this medication works every time."