Wait!!!! Eagle, this is a rare time I disagree with you.
FiorinalFiorinal
Fiorinal with codeine is '
butalbitalButalbital compound
Butalbital-acetaminophen', a barbiturate! You DO have to worry about seizures with this drug; in fact,barbiturates are one of the three things that have fatal withdrawal (the others being benzos and alcohol). All three work at the same receptor-- the GABA receptor-- but at different subunits.
I don't know exactly what your dose has been, but regular use of fiorinal, partiicularly heavy use, must be tapered off to avoid seizures and DT's. Incidentally, opiate withdrawal alone doesn't cause seizures. Like they say, it doesn't kill you-- but you wish you were dead!