It's either Fiorcet or Fiorinal. Basically either otc excedrine plus butabarbital (Fiorinal) or tylenol plus butabarbital.
It's an old medicine. For me it's a wonder drug. Works with no side effects unless I take a lot (>3) at one time. Take it when you THINK you're about to get a migraine. DO NOT wait. This works best if you can catch the headache before it really starts.
FYI - I think they just made it a triplicate form drug.