Anticoagulants: Phenobarbital lowers the plasma levels of dicumarol (name Beforehand employed: bishydroxycoumarin) and will cause a minimize in anticoagulant action as measured with the prothrombin time. Barbiturates can induce hepatic microsomal enzymes resulting in elevated metabolism and lessened anticoagulant response of oral anticoagulants (e.… Read More