C: Ignite about 200 mg: the residue effervesces with acids, and meets the requirements of the tests for SodiumAnticoagulants: Phenobarbital lowers the plasma levels of dicumarol (name previously used: bishydroxycoumarin) and causes a decrease in anticoagulant activity as measured by the prothrombin time. Barbiturates can induce hepatic microsomal e