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Kava
Kava — lo que la monografía europea realmente respalda, para qué no es, la forma y cuánto tiempo está pensado usarse, efectos adversos y la 3 interacción medicamentosas documentada.
Esta es una página de referencia, no un diagnóstico ni una receta. Los productos herbales son farmacología real: tienen efectos, efectos adversos e interacciones. Diga a su médico y farmacéutico todo lo que toma, incluidos tés y suplementos, y nunca suspenda ni cambie un medicamento recetado por algo que lea aquí.
Qué es
Piper methysticum G.Forst. — root and rhizome
Agrupado aquí bajo Where the harm is. Posición regulatoria:Withdrawn, suspended or restricted as a medicine in much of Europe after reports of severe liver injury.
Lo que respalda la evidencia
La indicación registrada:It was marketed for anxiety. It is included here as a boundary, not a recommendation.
Kava beverages have a long cultural history in the Pacific islands. The European story is different: standardised kava extracts marketed for anxiety in the 1990s were withdrawn or suspended in several countries after reports of severe hepatotoxicity, including liver failure requiring transplantation. Regulatory positions have shifted back and forth in the decades since and availability differs by country, which is exactly why an internet order is a poor way to settle the question. The awkward part of the case is that the trials suggested a genuine anxiety-reducing effect — an effective product with a rare, catastrophic harm is a much harder judgement than an ineffective one, and that is the honest shape of the kava file rather than a simple story of quackery. Preparation matters too: traditional water-based preparations of the peeled rootstock differ from the acetone and ethanol extracts that reached European shelves.
D — Popular claim unsupported, or safety dominates The better trials are negative, or the substance appears in the literature mainly for the harm it has caused.
Para qué no es
Anxiety disorders, which have treatments with far better-characterised risk. Do not import it to self-treat.
Forma, potencia y cuánto tiempo
Traditional water-based root beverages; ethanol and acetone extracts in capsules, which are the preparations associated with the liver reports.
Duración.Not applicable — no European regulator is recommending a course.
Ninguna cifra en gramos aparece en esta página a propósito. La parte de la planta, el disolvente de extracción y la relación droga-extracto definen juntos una preparación, y un número tomado de una no describe otra. El razonamiento está en el hub; la cantidad que le aplica es la impresa en el envase que sostiene, y un farmacéutico la leerá con usted.
Efectos adversos
Liver injury, which is rare but has been severe and occasionally fatal. Regular heavy use causes a dry, scaly skin condition known as kava dermopathy. Drowsiness and impaired driving, markedly worsened by alcohol.
Quién debería evitarlo
Avoid entirely with any liver disease, in pregnancy and while breastfeeding, and before driving.
Interacciones con medicamentos
| Medicamento o sustancia | Qué se describe |
|---|---|
| Alcohol | The combination increases both sedation and the liver risk, and impaired driving with kava plus alcohol is documented. |
| Sleeping tablets, benzodiazepines and sedating antihistamines | Additive sedation with benzodiazepines, sleeping tablets and sedating antihistamines. |
| Anything else that stresses the liver | Anything else with a liver signal — including alcohol and several medicines — should not be stacked with it. |
La vista inversa — empezar por el medicamento en vez de la planta — está en la referencia de interacciones de medicamentos, alimentos y alcohol, y resumido para cada hierba de este sitio.
Fuentes:NIH National Center for Complementary and Integrative Health — herb fact sheets · LiverTox: Clinical and Research Information on Drug-Induced Liver Injury (NIDDK, National Institutes of Health)· comprobado2026-09-06
Preguntas frecuentes
¿Para qué se usa kava?
It was marketed for anxiety. It is included here as a boundary, not a recommendation. Kava beverages have a long cultural history in the Pacific islands. The European story is different: standardised kava extracts marketed for anxiety in the 1990s were withdrawn or suspended in several countries after reports of severe hepatotoxicity, including liver failure requiring transplantation. Regulatory positions have shifted back and forth in the decades since and availability differs by country, which is exactly why an internet order is a poor way to settle the question. The awkward part of the case is that the trials suggested a genuine anxiety-reducing effect — an effective product with a rare, catastrophic harm is a much harder judgement than an ineffective one, and that is the honest shape of the kava file rather than a simple story of quackery. Preparation matters too: traditional water-based preparations of the peeled rootstock differ from the acetone and ethanol extracts that reached European shelves.
¿Funciona kava?
Valorado aquí D: The better trials are negative, or the substance appears in the literature mainly for the harm it has caused. Anxiety disorders, which have treatments with far better-characterised risk. Do not import it to self-treat.
¿Cuánto kava debo tomar?
Esta referencia no imprime cifras en gramos, porque no se transfieren entre preparaciones de distinta fuerza de extracto. Lo que se puede decir con honestidad es la forma y la duración:Traditional water-based root beverages; ethanol and acetone extracts in capsules, which are the preparations associated with the liver reports. Not applicable — no European regulator is recommending a course.
¿Cuáles son los efectos adversos de kava?
Liver injury, which is rare but has been severe and occasionally fatal. Regular heavy use causes a dry, scaly skin condition known as kava dermopathy. Drowsiness and impaired driving, markedly worsened by alcohol.
¿Interactúa kava con medicamentos?
Sí — documentado paraAlcohol, Sedatives, Liver load. Cada una se describe en esta página, con un enlace a la referencia del lado medicamento donde exista.
Otros enwhere the harm is
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