Fioricet 40mg is a sedative drug used for the treatment of mild to moderate pain. It works by blocking nerve impulses, which reduces your body’s response to painful sensations.Fioricet 40mg is a sedative drug used for the treatment of mild to moderate pain. It works by blocking nerve impulses, which reduces your body’s response to painful sensations.Fioricet 40mg is a sedative drug used for the treatment of mild to moderate pain. It works by blocking nerve impulses, which reduces your body’s response to painful sensations.Fioricet 40mg is a sedative drug used for the treatment of mild to moderate pain. It works by blocking nerve impulses, which reduces your body’s response to painful sensations.