My Dr. prescribed Imuran for Interstitial Pulmonary Fibrosis. Within 30 minutes of taking the first dose, I began having migraines. First I had 1 migraine a day, then it increased to 2 and then to 3 and 4 a day. I would wake up in the middle of the night with migraines. Even an emergency room trip and a shot of Demerol did not stop the migraines. I became violently ill vomiting bile before the Dr. discontinued use. It took weeks before the migraines stopped all the while, the Dr.s kept saying 'migraines aren't listed as a possible side effect'