I was finally cleared up in middle age when prescribed Retin A and an erythromycin cream. For the occasional cystic pimple, I was given a clindamycin dabber. Those cystic pimples were the bane of my teenage years! Clindamycin is like a miracle drug! I treated a budding blemish several times a day and it would go away before blooming! Awesome! For back zits, I started using a back brush in the shower. My back cleared up and back pimples were rare thereafter. Find excellent details Mike Walden