Drugs that have been reported to diminish oral anticoagulant response, ie, decreased prothrom-bin time response, in man significantly include: adrenocortical steroids;alcohol*;antacids;antihistamines;barbiturates;carbamazepine;chloral hydrate*;chlordiazepoxide;cholestyramine;diet high in vitamin K;diuretics*;ethchlorvynol;glutethimide;griseofulvin;haloperidol;meprobamate;oral contraceptives;paraldehyde;primidone;ranitidine*;rifampin;unreliable prothrombin time determinations;vitamin C;warfarin sodium under-dosage.
<anticoagulant, effect, adrenocortical steroids>, <anticoagulant, effect, alcohol>, <anticoagulant, effect, antacids>, <anticoagulant, effect, antihistamines>, <anticoagulant, effect, barbiturates>, <anticoagulant, effect, carbamazepine>, <anticoagulant, effect, chloral hydrate>, <anticoagulant, effect, chlordiazepoxide>, <anticoagulant, effect, cholestyramine>, <anticoagulant, effect, vitamin K>, <anticoagulant, effect, diuretics>, <anticoagulant, effect, ethchlorvynol>, <anticoagulant, effect, glutethimide>, <anticoagulant, effect, griseofulvin>, <anticoagulant, effect, haloperidol>, <anticoagulant, effect, meprobamate>, <anticoagulant, effect, contraceptives>, <anticoagulant, effect, paraldehyde>, <anticoagulant, effect, primidone>, <anticoagulant, effect, ranitidine>, <anticoagulant, effect, rifampin>, <anticoagulant, effect, vitamin C>, <anticoagulant, effect, warfarin sodium>