I have been prescribed Imitrex, I only have headaches, not migraine. I take Mestinon, Metoprolol, Baby Aspirin, Prednisone, Galantamine, Trospium, Gabapentin, Fish Oil, Vitamin C, Biotin, and MultiVitamin. I have Graves Disease and Myasthenia Gravis. Is Imitrex incompatible with my medications and why did this doctor prescribe Imitrex when I don t have Migraines?