irritable bowel syndrome
"A gastroenterologist prescribed this for me when I was having very severe abdominal pain from Sphincter of Oddi Dysfunction and IBS. Well, it did everything but relieve the pain. It blurred my vision, made me nauseous, gave me a pounding headache, made me feel very hot, dried my mouth, made me drowzy, and slowed down my heart rate. The pain continued to worsen, and I ended up in the ER. I had several more attacks afterwards, and the Levsin didn't work then, either. I was then referred to another gastroenterologist, who prescribed me Bentyl and Doxepin. While I have had less side effects with them, they haven't touched my pain, either."