Knotweed
OTHER NAME(S): Allseed Nine-Joints, Anjubar, Armstrong, Aviculaire, Beggarweed, Bian Xu, Bird's Tongue, Birdweed, Centinode, Cow Grass, Crawlgrass, Doorweed, Hogweed, Knot Grass, Knotgrass, Knotweed Herb, Lengua de Pajaro, Mexican Sanguinaria, Ninety-Knot, Pigrush, Pigweed, Polygoni Avicularis Herba, Red Robin, Renouée des Oiseaux, Sanguinaria, Sparrow Tongue, Swine's Grass, Swynel Grass, Vogelknoeterichkraut, Yerba Nudosa, Polygonum aviculare, Centinodia, Renouée Des Oiseaux
Overview
Knotweed is an herb. The whole flowering plant is used to make medicine.
Knotweed is used for swelling (inflammation) of the main airways in the lung (bronchitis), cough, sore throat, a mild form of gum disease (gingivitis), and other conditions, but there is no good scientific evidence to support these uses.
Knotweed might be able to reduce the swelling and bleeding that occur with gum disease.
Knotweed might be able to reduce the swelling and bleeding that occur with gum disease.
Uses
Insufficient Evidence for
- A mild form of gum disease (gingivitis). Early research suggests that a root extract of knotweed might be useful as a mouth rinse to treat gingivitis, decreasing bleeding and swelling of the gums.
- Swelling (inflammation) of the main airways in the lung (bronchitis).
- Cough.
- Skin irritation.
- Sore throat.
- Stopping bleeding.
- Tuberculosis.
- Other conditions.
More evidence is needed to rate the effectiveness of knotweed for these uses.
Side Effects
When taken by mouth: Knotweed is POSSIBLY SAFE when taken by mouth short-term. Three to four cups of tea per day, each prepared with 1.5 grams of knotweed powder, have been used with apparent safety.
When applied to the skin: Knotweed is POSSIBLY SAFE when used in a mouthwash twice daily for up to 2 weeks.
Precautions
When taken by mouth: Knotweed is POSSIBLY SAFE when taken by mouth short-term. Three to four cups of tea per day, each prepared with 1.5 grams of knotweed powder, have been used with apparent safety.
When applied to the skin: Knotweed is POSSIBLY SAFE when used in a mouthwash twice daily for up to 2 weeks.
Pregnancy and breast-feeding: There isn't enough reliable information to know if knotweed is safe to use when pregnant or breast-feeding. Stay on the safe side and avoid use.
Interactions
We currently have no information for Knotweed overview.
Dosing
The appropriate dose of knotweed depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for knotweed. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.
References
- Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
- Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
- Gonzalez Begne M, Yslas N, Reyes E, et al. Clinical effect of a Mexican sanguinaria (Polygonum aviculare L.) on gingivitis. J Ethnopharmacol 2001;74:45-51..