Does accutane cause ibd or colitis? or does it affect your gi tract?

The PI usually best: source for information; i.e. the Prescribing Information; the minimal information which the FDA believes should be available to any physician in order to intelligently decide whether to recommend a prescription molecule(s) to another human based on all known chemistry, research & clinical trial information. It can usually be found on the name brand website; later on at http://www.rxlist.com.