Dry your pimples but not your skin in a serum that is all actives and no residue to clog and cause breakouts.  Sebum production is inhibited as it protects you from breaking out.

This is to be used on the oily parts of your skin where you want to stop the sebum but not be dry and flaky..   Apply a few drops and massage into skin with a clean fingertip.   Use several times a day.