Other migraine treatments

My wife has had horrible debilitating Menstrual Migraines for several years now and they seem to be getting worse. We've finally found a doctor that seems very interested in doing whatever it takes to find a remedy.
Unfortunately, my wife cannot tolerate any of the normal drugs prescribed. Triptains, NAISDs, Anti-depressants have all been tried with side effects as bad as the migraines.

Does anyone have any suggestions for other medical or alternative treatments? The only thing that seems to actually work is a trip to the Emergency room for a shot of Dilauded. Can't really do that all the tiime.

Thanks for your help
KL