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Coumadin Interaction
| Question | Answer |
|---|---|
| Barbiturates | Induce CYP3A4, CYP1A2, CYP2C9 |
| Carbamazepine | Induce CYP3A4, CYP1A2, CYP2C9 |
| Cigarette Smoke | Induce CYP1A2 |
| Phenytoin | Indcue CYP3A4, CYP1A2, CYP2C9 |
| Rifampin | Induce CYP3A4, CYP1A2, CYP2C9 |
| Griseofulvin | Induce CYP3A4 |
| Nafcillin/Dicloxacillin | Induce CYP3A4 |
| Azathioprine | Inducer (unknown) |
| Cimetidine | Inhibit CYP1A2 |
| Ciprofloxacin | Inhibit CYP1A2 |
| Erythromycin | Inhibit CYP1A2, CYP3A4 |
| Fluvoxamine | Inhibit CYP1A2, CYP3A4 |
| Clarithromycin | Inhibit CYP3A4 |
| Fluoxetine (SSRIs) | Inhibit CYP3A4 |
| Grapefruit juice | Inhibit CYP3A4 |
| Itraconazole | Inhibit CYP3A4 |
| Nefazodone | Inhibit CYP3A4 |
| Omeprazole | Inhibit CYP3A4 |
| Quinidine | Inhibit CYP3A4 |
| Ritonavir | Inhibit CYP3A4 |
| Statins | Inhibit CYP3A4 |
| Tetracycline | Inhibit CYP3A4 |
| Tygacil | Inhibit CYP3A4 |
| Zafirlukasst | Inhibt CYP3A4, CYP2C9 |
| Amiodarone | Inhibit CYP2C9 |
| Disulfuram | Inhibit CYP2C9 |
| Metronidazole | Inhibit CYP2C9 |
| TMP/SMZ | Inhibit CYP2C9 |
| Cranberry juice | Inhibit CYP2C9 |
| Dong Quai | Increase INR |
| Papain | Increase INR |
| Ginkgo and ginseng | Increased bleeding |
| Garlic and giner | Increased bleeding |
| Coenzyme Q-10 | Decrease INR |
| St. John's Wort | Decrease INR |
| Green Tea | Decrease INR |
| Enzyme Inducers | Decreased INR |
| Enzyme Inhibitors | Increased INR |