Anticoagulants: Phenobarbital lowers the plasma levels of dicumarol (title Formerly employed: bishydroxycoumarin) and will cause a lower in anticoagulant action as measured through the prothrombin time. Barbiturates can induce hepatic microsomal enzymes causing amplified metabolism and diminished anticoagulant reaction of oral anticoagulants (e. Prevent driving or harmful exercise unt... https://henrike211pcn5.tnpwiki.com/user