SAFE — No Known Interaction
🟢 SAFE — Warfarin and Guarana can be taken together safely.
Evidence level: MODERATE
Warfarin and Guarana are generally safe to use together. No adverse interactions have been reported.
No clinically significant interaction between Warfarin and Guarana has been documented in medical literature.
No dietary interaction between Warfarin and Guarana. You can consume both without concern.
Be consistent with Guarana intake. If on warfarin, vitamin K-rich foods (leafy greens, broccoli, Brussels sprouts) affect clotting — don't avoid them, but eat consistent amounts week to week. Cranberry juice, grapefruit, and alcohol can amplify anticoagulant effects. Warfarin at the same time daily.
Higher risk for: elderly patients, those with liver disease, history of GI bleeding, concurrent use of multiple blood thinners, recent surgery, vitamin K intake changes, alcohol use, or low body weight.
Monitor for signs of altered bleeding when combining Warfarin with Guarana. Watch for: unusual or easy bruising, blood in urine or stool, prolonged bleeding from minor cuts, frequent nosebleeds, bleeding gums, or heavy menstrual periods. Have your INR or clotting times checked more frequently when starting or stopping this combination. When to seek emergency help: Severe bleeding that does not stop, blood in vomit, sudden severe headache, vision changes, confusion, or weakness on one side of the body (possible internal bleeding or stroke).
No urgent discussion needed. Keep your provider informed of your full supplement list.
Safe combination. No dietary restrictions needed. Maintaining a consistent diet helps ensure predictable supplement and medication performance.
Warfarin and Guarana are generally safe to use together. No adverse interactions have been reported.
Be consistent with Guarana intake. If on warfarin, vitamin K-rich foods (leafy greens, broccoli, Brussels sprouts) affect clotting — don't avoid them, but eat consistent amounts week to week. Cranberry juice, grapefruit, and alcohol can amplify anticoagulant effects. Warfarin at the same time daily.
Monitor for signs of altered bleeding when combining Warfarin with Guarana. Watch for: unusual or easy bruising, blood in urine or stool, prolonged bleeding from minor cuts, frequent nosebleeds, bleeding gums, or heavy menstrual periods. Have your INR or clotting times checked more frequently when starting or stopping this combination. When to seek emergency help: Severe bleeding that does not stop, blood in vomit, sudden severe headache, vision changes, confusion, or weakness on one side of the body (possible internal bleeding or stroke).
Safe combination. No dietary restrictions needed. Maintaining a consistent diet helps ensure predictable supplement and medication performance.
No urgent discussion needed. Keep your provider informed of your full supplement list.
Or browse the full interaction database (121,000+ pairs).