"i&#039;ve been using duac gel for around two years now. i know it&#039;s supposed to be a 12 week treatment for acne however when i first used this i had acne and i used it for maybe two weeks and my acne was gone. once i stop using duac gel i get the odd spots so i just use it everyday to prevent my spots coming back and i take a two week break every three months. i live in the uk so i get this product prescribed to me and a prescription on the nationalhealthservice here is "