Are there any effective adult acne treatments over the counter?

I find clearpores works extremely well, but there are many others like acnezine, proactiv, zenmed.|||I have heard great things about Proactive Solution. My sister uses it and I have watched the infomercial many times. Kelly Clarkson, Jessica Simpson, P Diddy, Vanessa William, Lindsey Lohan and many other Hollywood stars use it too. You can order it online, but most stores like Walmart, Target, Walgreens and as seen on tv stroes carry it too. It%26#039;s about $20 bucks but they say it works good.