Is fiorinal (aspirin butalbital and caffeine) w codeine dangerous, or just addictive?

Both: It is high risk medicine and to be used only under specific circumstances.

Fiorinal (aspirin butalbital and caffeine): Fiorinal (aspirin butalbital and caffeine) actually contains 3 drugs that can be addictive codeine a narcotic, butalbital a barbiturate and caffeine all of which may become addictive it also contains aspirin which has its own dangers Care should be taken when used frequently