Knotweed is an herb. The whole flowering plant is used to make medicine.

Knotweed is used for bronchitis, cough, gum disease (gingivitis), and sore mouth and throat. It is also used for lung diseases, skin disorders, and fluid retention. Some people use it to reduce sweating associated with tuberculosis and to stop bleeding.

How it works

Knotweed might be able to reduce swelling. It might also prevent plaque from building up on teeth.


Not Proven
Gum disease (gingivitis)

Developing research suggests that a root extract of knotweed might be useful as a mouth rinse to treat gingivitis. Gingivitis is caused by plaque, a film of saliva and bacteria that builds up on teeth at the gum line. The knotweed extract seems to decrease bleeding and swelling of the gums, possibly because it might interfere with the formation of plaque.

Lung diseases
Skin diseases
Fluid retention
Decreasing sweating associated with tuberculosis
Stopping bleeding
Other conditions


Knotweed may be safe for most people, but the possible side effects of knotweed are not known.



Pregnancy and breast-feeding: Not enough is known about the use of knotweed duringpregnancyandbreast-feeding. Stay on the safe side and avoid use.Dosing considerations for Knotweed.


No information available.

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