Acetaminophen / aspirin / caffeine / salicylamide
"I have taken other "specialty" migraine medicines with little results. Excedrin Migraine is identical to regular Extra Strength Excedrin. The combination of Acetaminophen/ Aspirin/ Caffeine/ Salicylamide is totally successful in limiting the effects of my migraines. As it is essentially Excedrin with the added Salicylamide, it indicates that the Salicylamide somehow enhances the pain reduction for migraines. 

For any general headache, I use Excedrin. But as soon as I feel any indications of an oncoming migraine event, I take Acetaminophen/ Aspirin/ Caffeine/ Salicylamide tablets (PainAid, Pain Stopper) and it completely stops any migraine advancement at that point."