BUTISOL SODIUM® (butabarbital sodium tablets, USP and butabarbital sodium oral solution, USP) is a non-selective central nervous system depressant which is used as a sedative or hypnotic. It is available for oral administration as Tablets containing 30 mg or 50 mg butabarbital sodium; and as Oral Solution containing 30 mg/5 mL, with alcohol (by volume) 7%. Other ingredients in the Tablets are: calcium stearate, corn starch, dibasic calcium phosphate, FD&C Blue No. 1 (30 mg only), FD&C Yellow No. 5 (30 mg and 50 mg — see PRECAUTIONS), FD&C Yellow No. 6 (50 mg only). Other ingredients in the Oral Solution are: D&C Green No. 5, edetate disodium, FD&C Yellow No. 5 (see PRECAUTIONS), flavors (natural and artificial), propylene glycol, purified water, saccharin sodium, sodium benzoate. Butabarbital sodium occurs as a white, bitter powder which is freely soluble in water and alcohol, but practically insoluble in benzene and ether.