The suicide rates are bunk. According to a recent study a few years ago, 1/100,000 accutane patients have killed tyhemselves, while 4/100,000 teenagers have committed suicide. No significant coorelation whatsoever. I took a full 6 month course and the acne, cystic I might add, disappeared within the first month of use.
Accutane is a mysterious drug, and killing the acne bacteria is not the primary means through which is works, as P. acne bacteria lives on everyone's face, you cannot permantly rid yourself of it, but it primarily dries out your sebaceous glands, normalizes skin exfoliation, and kills bacteria. There has been talk that it actually affects one's insulin sensitivity and certain hormones to do its job, which is why some say that many will continue to breakout within 1 year, but that was speculation of a few researchers.