Related Experiment Videos
Kava extracts: safety and risks including rare hepatotoxicity.
1Medical Department II, City Hospital Hanau, Teaching Hospital of the Johann Wolfgang Goethe University, Frankfurt/Main, Germany.
Summary
Kava, used for anxiety, rarely causes liver damage. A review found only one probable case of kava-induced liver injury among 19 suspected patients in Germany.
Area of Science:
- Pharmacology
- Hepatology
- Ethnobotany
Background:
- Kava (Piper methysticum) is a South Pacific shrub used for its psychoactive beverage.
- Kava extracts are globally recognized herbal anxiolytics.
- Previous studies indicate kava is generally safe, with rare reports of hepatotoxicity.
Purpose of the Study:
- To critically analyze suspected cases of kava-induced liver injury in Germany.
- To assess the causal relationship between kava consumption and hepatotoxic side effects.
- To provide recommendations for regulatory authorities and healthcare providers.
Main Methods:
- Review of 19 suspected cases of kava-related liver toxicity reported in Germany.
- Causality assessment based on clinical data and re-exposure tests.
- Analysis conducted by the British regulatory authority (MCA) and the study authors.
Main Results:
- Only one out of 19 patients showed a probable causal link between kava treatment and liver disease.
- Another patient had a possible association, while 5 cases were unlikely or excluded.
- Data for 12 patients were insufficient for definitive causality assessment.
Conclusions:
- Kava extracts exhibit a low incidence of severe hepatotoxicity.
- Further data collection is recommended for 12 patients with insufficient information.
- Physicians and patients should remain vigilant for potential liver side effects and conduct thorough diagnostics.