"i&#039;m 21 years old and have been suffering from chronic abdominal pain and irritable bowel syndrome for almost two years now. i started the nortriptyline about a year ago after countless trips to the hospital to get a grip on my pain. since last summer, i&#039;ve noticed a huge difference since being on the nortriptyline. there is still some pain, but the medicine really calmed everything down. the only thing that i frown upon is the fact that it makes me very tired. even though i take it at bedtime. i take 75mg every night and i wake up feeling groggy every day. i&#039;m not sure if anyone else has had this experience and side effect. but i&#039;d rather be tired than in pain, good luck to everyone!"