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Medical Definition of Butalbital
1. 5-allyl-5-isobutylbarbituric acid;a barbiturate of intermediate duration of action; a sedative and hypnotic. Synonym: allylbarbital. (05 Mar 2000)
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1. 5-allyl-5-isobutylbarbituric acid;a barbiturate of intermediate duration of action; a sedative and hypnotic. Synonym: allylbarbital. (05 Mar 2000)