The AOPA maintains a good medical section. If you go to:
http://www.aopa.org/members/database...h_faa_meds.cfm, and
check the waiver, you can enter a drug and see if it is OK with the
FAA. I looked at drugs used for Migraine treatment. There were 9
listed. Use was not allowed for 4. Of the other 5, 3 said to wait 24
hours after use. The other 2 showed no adverse effects.

I'd suggest you take a list like this and discuss it with your doctor.

Charlie