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[Beware: propafenon potentiates the effect of oral anticoagulants]. 1981

H A Körst, and J W Brandes, and K P Littmann

In a 68 years old female patient with premature ventricular contractions who was treated with phenprocoumon (Marcumar) because of pulmonary infarction, propafenon (Rytmonorm)--a new anti-arrhythmic drug--lead to an increased effect of coumarin. Inspite of pausing with coumarin for eight days the low Quick rates (less than 15%) did not increase until propafenon was stopped. Afterwards the coumarin treatment was continued with 1,5 to 3 mg a day. In case of a combined treatment with propafenon and coumarin Quick rates should be controlled frequently.

UI MeSH Term Description Entries
D011405 Propafenone An antiarrhythmia agent that is particularly effective in ventricular arrhythmias. It also has weak beta-blocking activity. Apo-Propafenone,Arythmol,Baxarytmon,Cuxafenon,Fenoprain,Jutanorm,Nistaken,Norfenon,Pintoform,Prolecofen,Propafenon AL,Propafenon Hexal,Propafenon Minden,Propafenone Hydrochloride,Propafenone Hydrochloride, (R)-Isomer,Propafenone Hydrochloride, (S)-Isomer,Propafenone, (+-)-Isomer,Propafenone, (R)-Isomer,Propafenone, (S)-Isomer,Propamerck,Rythmol,Rytmo-Puren,Rytmogenat,Rytmonorm,SA-79,Hydrochloride, Propafenone,SA 79,SA79
D011427 Propiophenones Propiophenone (ethyl phenyl ketone, structural formula C6H5COCH2CH3) and its derivatives. They are commonly used in perfumes and pharmaceuticals.
D001780 Blood Coagulation Tests Laboratory tests for evaluating the individual's clotting mechanism. Coagulation Tests, Blood,Tests, Blood Coagulation,Blood Coagulation Test,Coagulation Test, Blood,Test, Blood Coagulation
D003374 Coumarins Synthetic or naturally occurring substances related to coumarin, the delta-lactone of coumarinic acid. 1,2-Benzopyrone Derivatives,1,2-Benzopyrones,Coumarin Derivative,Coumarine,1,2-Benzo-Pyrones,Benzopyran-2-ones,Coumarin Derivatives,Coumarines,1,2 Benzo Pyrones,1,2 Benzopyrone Derivatives,1,2 Benzopyrones,Benzopyran 2 ones,Derivative, Coumarin,Derivatives, 1,2-Benzopyrone,Derivatives, Coumarin
D004357 Drug Synergism The action of a drug in promoting or enhancing the effectiveness of another drug. Drug Potentiation,Drug Augmentation,Augmentation, Drug,Augmentations, Drug,Drug Augmentations,Drug Potentiations,Drug Synergisms,Potentiation, Drug,Potentiations, Drug,Synergism, Drug,Synergisms, Drug
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly
D000889 Anti-Arrhythmia Agents Agents used for the treatment or prevention of cardiac arrhythmias. They may affect the polarization-repolarization phase of the action potential, its excitability or refractoriness, or impulse conduction or membrane responsiveness within cardiac fibers. Anti-arrhythmia agents are often classed into four main groups according to their mechanism of action: sodium channel blockade, beta-adrenergic blockade, repolarization prolongation, or calcium channel blockade. Anti-Arrhythmia Agent,Anti-Arrhythmia Drug,Anti-Arrhythmic,Antiarrhythmia Agent,Antiarrhythmia Drug,Antiarrhythmic Drug,Antifibrillatory Agent,Antifibrillatory Agents,Cardiac Depressant,Cardiac Depressants,Myocardial Depressant,Myocardial Depressants,Anti-Arrhythmia Drugs,Anti-Arrhythmics,Antiarrhythmia Agents,Antiarrhythmia Drugs,Antiarrhythmic Drugs,Agent, Anti-Arrhythmia,Agent, Antiarrhythmia,Agent, Antifibrillatory,Agents, Anti-Arrhythmia,Agents, Antiarrhythmia,Agents, Antifibrillatory,Anti Arrhythmia Agent,Anti Arrhythmia Agents,Anti Arrhythmia Drug,Anti Arrhythmia Drugs,Anti Arrhythmic,Anti Arrhythmics,Depressant, Cardiac,Depressant, Myocardial,Depressants, Cardiac,Depressants, Myocardial,Drug, Anti-Arrhythmia,Drug, Antiarrhythmia,Drug, Antiarrhythmic,Drugs, Anti-Arrhythmia,Drugs, Antiarrhythmia,Drugs, Antiarrhythmic
D000925 Anticoagulants Agents that prevent BLOOD CLOTTING. Anticoagulant Agent,Anticoagulant Drug,Anticoagulant,Anticoagulant Agents,Anticoagulant Drugs,Anticoagulation Agents,Indirect Thrombin Inhibitors,Agent, Anticoagulant,Agents, Anticoagulant,Agents, Anticoagulation,Drug, Anticoagulant,Drugs, Anticoagulant,Inhibitors, Indirect Thrombin,Thrombin Inhibitors, Indirect

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