Oxytetracyclin was the final thing I was on (and I had been on a lot of things, not all at once of course) before I was tranferred to a dermatologist and put on roaccutane. It's brilliant, I was on it for 8 months because my spots were quite bad, but now I'm cleared up completely and I haven't taken it for around 3 months and counting and they haven't come back.
Those severe side-effects they put on the leaflet are really only to protect themselves should anything happen to anyone and they blame the tablets, the company can just say they warned you. The only side effect I experienced, as well as most other people I spoke to who took the drug, was the dryness. Also, they say roaccutane can cause depression, but if anything, I was happier because I could see my face clearing up.