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Severe· moderate-evidence
Avoid this combination unless your prescriber explicitly approves it with appropriate monitoring.
Kava may reduce the effectiveness of levodopa, worsening Parkinsonian symptoms. Case reports document worsening of symptoms.
Kava may have dopamine antagonist properties that counteract levodopa's dopaminergic effects.
Source: Clinical Studies · Reviewed April 2026
Kava + Levodopa: high risk. Avoid this combination unless your prescriber explicitly approves it with appropriate monitoring. Kava may reduce the effectiveness of levodopa, worsening Parkinsonian symptoms. Case reports document worsening of symptoms.
Kava may have dopamine antagonist properties that counteract levodopa's dopaminergic effects.
Do not stop either abruptly on your own. Talk to your prescriber or pharmacist promptly — bring this page to your appointment.
Educational information only — not medical advice. Always verify with a healthcare professional.