Commonly used drugs and their effect on INR
| Drugs . | Effect on INR . |
|---|---|
| Amiodarone | Increases |
| Antibiotics: ciprofloxacin, metronidazole, fluconazole, voriconazole, isoniazid, clarithromycin, erythromycin | Increases |
| Rifampicin | Lowers |
| Sertraline, fluoxetine | Increases |
| Carbamazepine, phenobarbital | Lowers |
| Lovastatin, fluvastatin | Increases |
| Alternative remedies: St John’s wort, charbroiled food | Lowers |
| Drugs . | Effect on INR . |
|---|---|
| Amiodarone | Increases |
| Antibiotics: ciprofloxacin, metronidazole, fluconazole, voriconazole, isoniazid, clarithromycin, erythromycin | Increases |
| Rifampicin | Lowers |
| Sertraline, fluoxetine | Increases |
| Carbamazepine, phenobarbital | Lowers |
| Lovastatin, fluvastatin | Increases |
| Alternative remedies: St John’s wort, charbroiled food | Lowers |