"great product but the side effects are awful! 
i&#039;ve been using duac for a week now and literally all of my blackheads have disappeared it&#039;s amazing! my spots have also shrank in size a lot and have almost healed and my scars are fading too. the only trouble i have had with duac is that when i first put it on it dried my skin out a lot and made it extremely flaky and then when i continued to use it, applying it on most of the area of my face i woke up the next morning and both of my cheeks were burning, bright red and really itchy. i stopped using it for a couple of days until the redness had gone and then applied a smaller amount, but still the burning and itchy sensation has returned."