Root decoctions are taken on their own, or mixed with `kalamuzi' for male impotence, as it cleanses the blood, clearing the way for an erection.
Stems and roots are peeled and eaten raw, and are also used to make beer.
A root decoction is used as a tonic for abdominal pain.

Chemical constituents :
The occurrence of a bitter principle, named celastrin, has been reported.
Khan et al. (2004) have identified the major constituent in the rhizomes of Gunnera perpensa to be Z-venusol, a phenylpropanoid glucoside.

Medicinal uses :

Root decoctions are used in traditional gynaecological practice as well as traditional veterinary practice to initiate labour, assist delivery or to expel the placenta.
The rhizome is a common ingredient of inembe and isihlambezo, preparations used during the last trimester of pregnancy to ensure healthy foetal growth and easy delivery.
Decoctions are also taken orally to relieve dysuria, rheumatic pains and dyspepsia, as a stomachic, or for colds.
Externally a decoction is used as a wound dressing.
Infusions may be taken internally or applied externally to treat psoriasis.

Precautions :
The use of this herb during pregnancy should be undertaken only on the advice of a competent traditional practitioner. Non-pregnant women taking Gunnera perpensa preparations for other indications should be advised of the possibility of abortifacient activity.

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