Acetaminophen / Butalbital / Caffeine
Like most of the drugs of this type, Fioricet is an orally ingested drug with a relatively quick effect, it takes about 10 to 15 minutes for it to start working it's magic. It's much more potent than your regular migraine pills, so you're not supposed to be taking these things regularly, not day after day, let alone several pills over the course of the same day - read the instructions carefully as the pill has some addictive properties that you'd want to avoid.
So, how does Fioricet actually work? It's a potent mix of three ingredients that are often used in pain relief medication - Butalbital, Acetaminophen and Caffeine. Caffeine's the best known component of all of the listed ones, so let's start with it. It's an upper drug that you often have in the form of tea or coffee, even in coca-colas and chocolate, it's an ingredient that helps regulate the blood flow to your brain, something many scientists believe is one of the causes of a headache. Side effects of this ingredient in Fioricet include stomach problems, especially if you are hitting the coffee pot hard already - you shouldn't buy Fioricet if you are overdosing yourself with caffeine related products already.
Next on the menu are Butalbital and Acetaminophen - two components that are often used in pain relieving medicine. The first one will help you relax and will dampen you a bit, which is why it is not recommended to take Fioricet if you're operating heavy machinery or if you're driving. The second one is a drug that you can recognize as being main active ingredient in Tylenol - it is there to relief your pain in combination with other Fioricet components.