Last time I checked Roche had stopped its production becuase of las suits. But other generics are widely available.
To the OP. My acne cleared up on 20mg/ED for 8-12 weeks. Lower dose for longer as BG said. Accutane may also make your acne worse to start with, then it will improve.
I got headaches, dry lips and eyes and was lethargic. Nasty f*cking compound.