Pernex AC 5%Pernex AC 5 % Gel is an antiseptic that is effectively used on the skin to treat acne (pimples, blackheads and whiteheads) on your face, back and chest. It works by stopping the growth of bacteria on your skin. Pernex AC 5 % Gel reduces painful lumps and clears the dirt and excess oil from your skin. Pernex AC 5 % Gel has to be used as per your doctors instructions. Pernex AC 5 % Gel is not recommended for use in children below 12 years of age.