It is very easy to extract pure butalbital from Fioricet, and leave out nasty paracetamol and caffeine. Crush up the pills to a fine powder and dissolve them in water, shake the solution for a while so all the caffeine and soluble binders dissolve in the water. Filter the solution and discard the water. Add the remainders to a fresh amount of water and add some lye(sodium hydroxide) and shake well. The butalbital will turn into the water soluble sodium salt and dissolves in the water, the paracetamol stays undissolved, together with the undissolved binders. Filter the solution and keep the solution, discard the filter with the paracetamol and other crap. Now slowly add hydrochloric acid to the solution untill precipitation stops. By adding hydrochloric acid to the sodium butalbital solution the sodium butalbital turns into the unsoluble free base and precipitates. After filtering the solution one is left with practically pure butalbital, free from harmful paracetamol and jittery caffeine, as well as binders!