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Nettle
Nettle — 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
Urtica dioica L. — leaf and herb (Urticae folium), and root (Urticae radix)
Nombres locales en la región que sirve este sitio:nõges (ET) · nokkonen (FI) · крапива (RU).
Agrupado aquí bajo Joints, urinary tract and hormones. Posición regulatoria:EU herbal monograph — traditional use (separate monographs for leaf and root).
Lo que respalda la evidencia
La indicación registrada:Leaf: to increase the amount of urine and so flush the urinary tract in minor complaints, and for minor joint pain. Root: lower urinary tract symptoms related to benign enlargement of the prostate.
Leaf and root are two different medicines from one plant, and mixing them up is the usual error. The leaf — the spring soup and tea plant across the whole Baltic and Nordic region — carries an aquaretic indication: increasing urine volume to flush the urinary tract, with a firm instruction to drink plenty of fluid while doing it. That flushing use is explicitly not a treatment for a urinary infection. Fever, pain in the flank, blood in the urine, or symptoms lasting more than a couple of days mean a clinician, because an untreated kidney infection is serious and a diuretic tea does nothing about the bacteria. The root has a completely separate indication for the urinary symptoms of an enlarged prostate, with the same rule attached: a doctor should have excluded other causes of those symptoms first. Nutritionally the cooked or dried leaf is a genuinely good spring green — cooking and drying destroy the sting.
C — Traditional use only Plausible from thirty or more years of use, which is what a traditional-use registration means. No clinical evidence was required and none has settled it.
Para qué no es
Urinary tract infections, kidney stones, or prostate symptoms that have never been assessed. Flushing regimes are actively wrong in heart failure and in kidney disease where fluid is restricted.
Forma, potencia y cuánto tiempo
Dried leaf as an infusion, fresh leaf as food, leaf extracts and tinctures, and separately root extracts in capsules for prostate symptoms.
Duración.Short courses for the leaf indications. Prostate symptoms are a long-term matter and belong with a doctor.
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
Mild stomach upset and allergic skin reactions. The stinging hairs on the fresh plant cause the familiar rash, which is mechanical rather than allergic.
Quién debería evitarlo
Do not use flushing regimes where fluid must be restricted — heart failure, kidney impairment. Not established in pregnancy for medicinal amounts.
Interacciones con medicamentos
| Medicamento o sustancia | Qué se describe |
|---|---|
| Anticoagulants and antiplatelets (warfarin, DOACs, aspirin, clopidogrel) | Nettle leaf is high in vitamin K, the nutrient warfarin works against. A sudden switch to daily nettle soup or nettle tea in spring can shift INR. Keep intake steady and tell whoever monitors it — this is one of the few genuinely seasonal interactions in northern Europe. |
| Blood-pressure medicines, diuretics and corticosteroids | Increasing urine output alongside diuretics or blood-pressure medicines is not automatically harmful, but it belongs on the list, especially with heart failure or kidney disease, where a flushing regime is exactly the wrong idea. |
| Diabetes medicines and insulin | Reports of blood-glucose lowering exist; monitor rather than assume if you are on glucose-lowering medicines. |
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:European Medicines Agency — Committee on Herbal Medicinal Products (HMPC), European Union herbal monographs · NIH National Center for Complementary and Integrative Health — herb fact sheets· comprobado2026-09-06
Preguntas frecuentes
¿Para qué se usa nettle?
Leaf: to increase the amount of urine and so flush the urinary tract in minor complaints, and for minor joint pain. Root: lower urinary tract symptoms related to benign enlargement of the prostate. Leaf and root are two different medicines from one plant, and mixing them up is the usual error. The leaf — the spring soup and tea plant across the whole Baltic and Nordic region — carries an aquaretic indication: increasing urine volume to flush the urinary tract, with a firm instruction to drink plenty of fluid while doing it. That flushing use is explicitly not a treatment for a urinary infection. Fever, pain in the flank, blood in the urine, or symptoms lasting more than a couple of days mean a clinician, because an untreated kidney infection is serious and a diuretic tea does nothing about the bacteria. The root has a completely separate indication for the urinary symptoms of an enlarged prostate, with the same rule attached: a doctor should have excluded other causes of those symptoms first. Nutritionally the cooked or dried leaf is a genuinely good spring green — cooking and drying destroy the sting.
¿Funciona nettle?
Valorado aquí C: Plausible from thirty or more years of use, which is what a traditional-use registration means. No clinical evidence was required and none has settled it. Urinary tract infections, kidney stones, or prostate symptoms that have never been assessed. Flushing regimes are actively wrong in heart failure and in kidney disease where fluid is restricted.
¿Cuánto nettle 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:Dried leaf as an infusion, fresh leaf as food, leaf extracts and tinctures, and separately root extracts in capsules for prostate symptoms. Short courses for the leaf indications. Prostate symptoms are a long-term matter and belong with a doctor.
¿Cuáles son los efectos adversos de nettle?
Mild stomach upset and allergic skin reactions. The stinging hairs on the fresh plant cause the familiar rash, which is mechanical rather than allergic.
¿Interactúa nettle con medicamentos?
Sí — documentado paraAnticoagulants, warfarin, Blood pressure, Diabetes medicines. Cada una se describe en esta página, con un enlace a la referencia del lado medicamento donde exista.
Otros enjoints, urinary tract and hormones
Saw palmetto
Relief of lower urinary tract symptoms related to benign prostatic hyperplasia, after a doctor has excluded serious conditions.
Cranberry
Reducing the chance of repeat urinary tract infections in some groups — not treating an infection that is already present.
Black cohosh
Relief of menopausal complaints such as hot flushes and profuse sweating.
Devil's claw
Relief of minor joint pain, and of mild digestive complaints such as bloating and loss of appetite.
Feverfew
Prophylaxis of migraine headaches, after serious conditions have been excluded by a doctor.
Guardar toda la lista en un sitio
TempoLife registra suplementos junto a comida, sueño y cómo se sintió de verdad — así la respuesta a «¿qué está tomando?» es una pantalla, no una conjetura.