Table 3.164.
Drug use in patients on warfarin
| Drug group | Avoid since warfarin is enhanced | No significant interference | Alternatives that can be used |
| Antibacterials |
• Benzylpenicillin • Cephalosporins (2nd, 3rd generation) | • Ampicillin • Amoxicillin | • Azithromycin • Cephalosporins (others) • Penicillin V |
| • Clarithromycin • Clindamycin • Ciprofloxacin | • Amoxicillin plus clavulanic acid | ||
| • Co-trimoxazole (and other sulphonamides) • Doxycycline | |||
| • Erythromycin • Isoniazid • Metronidazole • Neomycin | |||
| • Ofloxacin • Quinolones | |||
| • Tetracyclines | |||
| Antifungals |
• Azoles (fluconazole, itraconazole, ketoconazole, miconazole) | • Amphotericin • Nystatin | |
| • Griseofulvin | |||
| Antivirals | • Ritonavir • Saquinavir | ||
| Analgesics |
• Aspirin • Indometacin • Ketorolac • Ketoprofen | • Ibuprofen • Paracetamol/acetaminophen | • Celecoxib • Codeine |
| • Naproxen • Piroxicam • Tramadol | • Dextropropoxyphene • Diclofenac | ||
| • Dihydrocodeine | |||
| Others | • SSRIs • TCAs | • Benzodiazepines | |