Biomaterial Database

Potentiation of warfarin by trimethoprim-sulfamethoxazole. 1980

J M Kaufman, and H E Fauver

Potentiation of warfarin by trimethoprim-sulfamethoxazole (TMP-SMX) has been reported occasionally but not in the urologic literature. Three cases are presented in which significant bleeding developed when TMP-SMX was added for the patient already on warfarin anticoagulants. The mechanism of this interaction is uncertain but probably involves competitive protein binding by the two drugs.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
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
D004844	Epistaxis	Bleeding from the nose.	Nose Bleed,Nosebleed,Nasal Bleeding,Nosebleeds,Bleeding, Nasal,Bleedings, Nasal,Nasal Bleedings,Nose Bleeds
D005260	Female		Females
D006417	Hematuria	Presence of blood in the urine.	Hematurias
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
D013420	Sulfamethoxazole	A bacteriostatic antibacterial agent that interferes with folic acid synthesis in susceptible bacteria. Its broad spectrum of activity has been limited by the development of resistance. (From Martindale, The Extra Pharmacopoeia, 30th ed, p208)	Sulfamethylisoxazole,Gantanol,Sulfisomezole,Sulphamethoxazole
D014295	Trimethoprim	A pyrimidine inhibitor of dihydrofolate reductase, it is an antibacterial related to PYRIMETHAMINE. It is potentiated by SULFONAMIDES and the TRIMETHOPRIM, SULFAMETHOXAZOLE DRUG COMBINATION is the form most often used. It is sometimes used alone as an antimalarial. TRIMETHOPRIM RESISTANCE has been reported.	Proloprim,Trimpex