I had/have a really annoying and bad case of acne. (not cystic, just "pebbly" all over my face) When I was younger I tried doxycycline, tetracycline, and some others I can't remember, and nothing worked at all, until I was old enough for Accutane. I had also tried pretty much every wash/scrub/lotion in the book with no luck.
Accutane has pretty much saved my life and has made my face amazing. Without it my face would probably be a scarred up and painful face. You have to commit to taking the pills, but its not that hard and it is soo worth the time taking it once it starts working. It was the only thing that had/has worked for me, washing my face has never been enough. Most people never have there acne come back after their first trial, although I have had to come back on it a few times.
If you do have a tough case, look into different pills with your doctor and get checked out by a dermatologist who may find a prescription creme that will work first instead of pills. I personally wouldn't recommend wasting money on proactive or skin id because you can get better, cheaper stuff elsewhere, it some aspects it is a marketing gimmick.
Hope you have some success... acne sucks but theres almost always a way out of it if you work hard to find the right fix.