I took it for a while when i was a little bit younger than you.
Worked MUCH better than the perscriptioin creams that would dry out my face leaving me looking like some sort of leper. It would work in what seemed like cycles. So from the time i took it my acne would gradually get better, and then i'd have a breakout that basically returned me to what i was like before... and then things would get slightly better than where they were before the breakout and then a week or so later i'd get a breakout that was about what i was like before the last breakout... so on so forth until my skin was just like everyone elses if not better. Worked fantastically.
I stopped a bit early. I still have pimples occasionally... basically i'm human.
The side effects?
The first day i took the medication i slept 23 hours straight. It really drained me. I didn't feel sick or anything, i was just very tired. Beyond that people told me i was more irritable and less happy when i was on the medication, although i never noticed any change and felt perfectly fine. Everyone close to me said i changed a lot while on the medication though, so i would recommend possibly matching it with an anti-depressant.
Would i do it again? Honestly, yes. It boosted my self-esteem quite a bit. It was worth it. Assuming you're not a pregnant woman, you'll probably be fine. My girlfriends mom was on that medication and didn't know she was preggers.... and the child is retarded... nice, but retarded.
Don't drink if you can avoid it. That medication is tough on your liver, and any competent physician is going to want to do blood tests once a month to monitor how you're doing. I drank on various occasions and had no other problems than a smelly dick.