MODERATE — Monitor Closely
🟡 USE CAUTION — Warfarin and Azithromycin may interact. Talk to your doctor before combining.
Evidence level: MODERATE
Z-Pack can increase warfarin effect by disrupting gut bacteria. Monitor INR during antibiotic course.
Gut flora disruption reducing vitamin K production → increased warfarin effect.
The interaction between Warfarin and Azithromycin is manageable with awareness. Talk to your doctor or pharmacist, especially if you notice any new or unusual symptoms after combining them.
Space Warfarin at least 2 hours from Azithromycin. Follow antibiotic-specific food instructions carefully. Complete the full antibiotic course even if symptoms improve.
Risk may increase with: older age, liver or kidney impairment, taking multiple medications, and higher doses of either substance.
Monitor for any new or unusual symptoms when starting this combination. Report changes to your healthcare provider.
Mention this combination at your next appointment. Ask: "Should I adjust timing or doses of Warfarin and Azithromycin?" Your doctor may want to monitor specific lab values.
This medication combination requires careful medical oversight. Your doctor or anticoagulation clinic can adjust doses or select alternatives with fewer bleeding risks. Frequent INR monitoring is essential.
Z-Pack can increase warfarin effect by disrupting gut bacteria. Monitor INR during antibiotic course.
Space Warfarin at least 2 hours from Azithromycin. Follow antibiotic-specific food instructions carefully. Complete the full antibiotic course even if symptoms improve.
Monitor for any new or unusual symptoms when starting this combination. Report changes to your healthcare provider.
This medication combination requires careful medical oversight. Your doctor or anticoagulation clinic can adjust doses or select alternatives with fewer bleeding risks. Frequent INR monitoring is essential.
Mention this combination at your next appointment. Ask: "Should I adjust timing or doses of Warfarin and Azithromycin?" Your doctor may want to monitor specific lab values.
Or browse the full interaction database (121,000+ pairs).