Table 4 Types of drugs concurrently prescribed with warfarin known to have interaction and their potential effect on INR values (n = 91)
From: Drug-related problems and potential contributing factors in the management of deep vein thrombosis
Drugs | Effect on INR | Severity |
|---|---|---|
Norfloxacin, Metronidazole, Clarithromycin | Increase | Major |
Rifampin | Decrease | Major |
Isoniazid, Omeprazole, Tramadol, Ceftriaxone, Cimetidine, Allopurinol, Azithromycin | Increase | Moderate |
Nevirapine, Neurobion, Mercaptopurine | Decrease | Moderate |
Efavirenz, Hydrocortisone, Prednisolone | Increase/Decrease | Moderate |
Methotrexate, Vincristine, Furosemide, Simvastatin | Increase | Minor |
Hydrochlorothiazide | Decrease | Minor |