Methylergonovine
"I had migraines from when I was about 17 y/o and now I am a Senior. I was started on Cafergot, 2 to start at the beginning of a headache and then one every 1/2 an hour but no more than 6 pills/headache.  Then the doctor added a pain pill and later on a Xanax. The combination worked very well but the headache neurologist suggested one medication per day to keep the headaches away. He started me on Bellermine. But it didn't do what he expected. There were some side effects I didn't like. Unfortunately  he passed away so I had to find another headache neurologist. In NYC we have  lots of doctors to choose from. I found one who listened to my story. At the end of my story he prescribed Methergine.  I haven't had a headache since the late 1990s."