5-allyl-5-isobutylbarbituric acid;a barbiturate of intermediate duration of action; a sedative and hypnotic. ... Synonym: allylbarbital. ... (05 Mar 2000) ... 
(bu-tal´bĭ-tәl) an intermediate-acting barbiturate used as a sedative along with an analgesic in treatment of tension headache or migraine.