Miconazole
"I take a medictaion for my migraines, and one of the side effects is yeast infections. And once in a great blue moon I will get the dreaded yeast infection. Luckily I caught it in the beginning and headed right to the store and  buy the OTC  3 day vaginal cream. Well, I so happened to have caught Monistat 1 on sale.  SO before making the purchase, I checked with my pharmacist, and they verified that IT IS SAFE to take Monistat1 while on my migraine medication. So I grabbed it. NEVER AGAIN! I am worse off now than what I was 4 days ago.  Now I need to go to the doctors to get a prescriptions to get rid of the yeast infection that an OTC should have taken care of, instead Monistat made worse."