PIP: The only intestinal complications of oral contraception, besides occasional diarrhea, are ischemic colitis, intestinal infarction, and acute ulcerative colitis. Ischemic colitis, the most common of the 3, is usually localized in the left colon, is due to intravascular coagulation, and resolves on stopping the pill. Intestinal infarction is rare but sometimes fatal, and usually occurs after thrombosis of the superior mesenteric artery. Acute ulcerative colitis is often severe but clears up on stopping the pill, although the etiologic role of the pill is in dispute. 1 case of severe Crohn's disease in a pill user was observed. This disorder is known to occur in pregnancy, but has not previously been associated with oral contraception.