I also take the Fiornal #3 due to Chronic Migranes triggered by Atmospheric Conditions (and I live in the Deep South which sucks big time). I have been told by my Doctor that the Fiornal works so well because it also has Phenobarbital(sp?) in it in addition to the caffine and codine. I have no clue, I just know it's one of the only thing that works on my terrible migraines that I've suffered with since age 7.
I am taking Topamax 50mg in the am and 50mg at bedtime, 20mg of Paxil and 50mg in the am and 50mg at bedtime as a preventive. I only use the Firornal w/Codine as a rescue med. I have been on this regimine for almost 2 years now, and it has been a lifesaver. I have NOWHERE near the frequency/number of migraines, and when I DO get a headache, it's NOWHERE near as severe as they used to be. YAY!
Edited to add:
I also have chronic ongoing back problems at L4-S1 and am actually going to the Neurosurgeon on 3/13 to schedule the date for my Fusion. I am aslo on the Duragesic 12.5 patch, and Percocet 7.5 for BT, but I have never mixed the Perc and the Fiornal. I have been okayed to take the fiornal while on the Duragesic by my PM.
Hoping for Pain Free days for all ASAP.