I am 38, and have dealt with acne as an adult. I have done the dermatologist route, with no success. The ONLY thing that EVER worked for me, is Proactiv.
It's gentle on my skin, but the most effective thing I've used. It DOES clear up my skin.
You do use it as a daily regimen, it's only 3 steps, so takes a total of a few minutes, and it actually soothes the skin. Other things I've used were soooo irritating. Not Proactiv. My skin actually feels calmer after I've used it. And within a very short time, my skin feels much smoother, softer, and looks much clearer.
And there is a product that usually comes with the 3 piece kit that is called a facial mask, that is a fantastic spot treatment for acne flare ups. If you put a spot of this stuff on an acne spot at night, by morning, it will come to a head, then after one more day of the spot treatment, it's gone. Seriously.
I'd definitely recommend you trying Proactiv, if you haven't already. It's truly the best skin care line I've ever used. It actually works.
And NO, I don't work for Proactiv. I just use it and love it.