TempoLife › Fonctions › Herb and spice reference: evidence, dose and interactions › nettle
Nettle
Nettle — ce que la monographie européenne soutient réellement, ce à quoi ce n’est pas destiné, la forme et la durée prévue, les effets indésirables, et le 3 interaction médicamenteuses documentée.
Ceci est une page de référence, pas un diagnostic ni une ordonnance. Les produits à base de plantes sont de la vraie pharmacologie : effets, effets indésirables et interactions. Dites à votre médecin et à votre pharmacien tout ce que vous prenez, thés et compléments compris, et n’arrêtez ni ne changez jamais un médicament prescrit à cause de ce que vous lisez ici.
Ce que c’est
Urtica dioica L. — leaf and herb (Urticae folium), and root (Urticae radix)
Noms locaux dans la région que ce site dessert :nõges (ET) · nokkonen (FI) · крапива (RU).
Groupé ici sous Joints, urinary tract and hormones. Position réglementaire :EU herbal monograph — traditional use (separate monographs for leaf and root).
Ce que les preuves soutiennent
L’indication enregistrée :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.
Ce à quoi ce n’est pas destiné
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.
Forme, force et durée
Dried leaf as an infusion, fresh leaf as food, leaf extracts and tinctures, and separately root extracts in capsules for prostate symptoms.
Durée.Short courses for the leaf indications. Prostate symptoms are a long-term matter and belong with a doctor.
Aucun chiffre en grammes n’apparaît sur cette page exprès. La partie de plante, le solvant d’extraction et le rapport drogue-extrait définissent ensemble une préparation, et un nombre pris à l’une ne décrit pas l’autre. Le raisonnement est exposé sur le hub ; la quantité qui s’applique à vous est celle imprimée sur le paquet que vous tenez, et un pharmacien la lira avec vous.
Effets indésirables
Mild stomach upset and allergic skin reactions. The stinging hairs on the fresh plant cause the familiar rash, which is mechanical rather than allergic.
Qui devrait l’éviter
Do not use flushing regimes where fluid must be restricted — heart failure, kidney impairment. Not established in pregnancy for medicinal amounts.
Interactions avec les médicaments
| Médicament ou substance | Ce qui est décrit |
|---|---|
| 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 vue inverse — partir du médicament plutôt que de la plante — est dans la référence des interactions médicaments, aliments et alcool, et résumé pour chaque plante de ce site.
Sources :European Medicines Agency — Committee on Herbal Medicinal Products (HMPC), European Union herbal monographs · NIH National Center for Complementary and Integrative Health — herb fact sheets· vérifié2026-09-06
Questions fréquentes
À quoi sert 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.
Est-ce que nettle marche ?
Noté ici 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.
Combien de nettle dois-je prendre ?
Cette référence n’imprime pas de chiffres en grammes, car ils ne se transférent pas entre préparations de force d’extrait différente. Ce qu’on peut dire honnêtement, c’est la forme et la durée :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.
Quels sont les effets indésirables 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.
Est-ce que nettle interagit avec des médicaments ?
Oui — documenté pourAnticoagulants, warfarin, Blood pressure, Diabetes medicines. Chacune est décrite sur cette page, avec un lien vers la référence côté médicament s’il en existe une.
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Garder toute la liste au même endroit
TempoLife consigne les compléments à côté de l’alimentation, du sommeil et de comment vous vous êtes vraiment senti — la réponse à « que prenez-vous ? » est un écran, pas une conjecture.