I suffered with adult acne which gradually got worse over a three year period. I spent a fortune on various skin care products which, for a short time, would show an improvement but then appeared to make my skin worse. Id been to the doctors and was taking tablets and using a prescribed cream but that wasn't really touching it either. I then went to a different doctor who was actually a dermatologist as well and she prescribed the same tablets and cream, but also an additional tablet. I took these for around 5 months and noticed slight improvements, but was told it could take 6+ months to take full effect (can I add that I was not prescribed roaccutane). At around the 6 month mark I quit using all the face washes, lotions etc and started using cetaphil gentle cleanser and then loreal skin perfection micellar water to remove my makeup - I basically stopped stripping it and left it in a more natural state. This complimented my doctors treatment and my skin began to clear up rapidly.
I hope I haven't rambled but I just want to share what worked for me. I would definitely recommended seeking medical advice, ideally from a skin specialist, and also to try not to use too many products - find something gentle x