Kava Kava
Botanical: Piper methysticum (FORST.)
Family: N.O. Piperaceae
-Synonyms---Ava. Intoxicating Pepper. Ava Pepper.
---Part Used---The peeled, dried and divided rhizome.
---Habitat---Polynesia, Sandwich Islands, South Sea Islands. Official in the Australian Colonies. Introduction
Description---An indigenous shrub several feet high, leaves cordate, acuminate, with very short axillary spikes of flowers, stem dichotomous, spotted. The natives prepare a fermented liquor from the upper portion of the rhizome and base of the stems; it is narcotic and stimulant and is drunk before important religious rites. The root of the plant chewed and mixed with the saliva, gives a hot intoxicating juice; it is mixed with pure water or the water of the coco-nut. Its continued use in large doses causes inflammation of the body and eyes, resulting in leprous ulcers; the skin becomes parched and peels off in scales. Commercial Kava rhizome is in whitish or grey-brown roughly wedge-shaped fragments from which the periderm is cut off about 2 inches thick; the transverse section usually shows a dense central pith, surrounded by a clean ring of vascular bundles, narrow and radiating, separated by broadish light-coloured medullary rays. Fracture starchy, faint pleasant odour, taste bitter, pungent, aromatic; it yields not more than 8 per cent of ash.
---Constituents---Oil cells often contain a greenish-yellow resin, termed kawine; it is strongly aromatic and acrid; the plant contains a second resin less active than the first, a volatile oil and an alkaloid, Kavaine Methysticcum yangonin, and abundance of starch.
---Medicinal Action and Uses---The
effect on the nerve centres is at first stimulating, then depressing,
ending with paralysis of the respiratory centre. The irritant action and
insolubility of the resin has lessened its use as a local anesthetic,
but for over 125 years Kava root has been found valuable in the
treatment of gonorrhoea both acute and chronic, vaginitis, leucorrhoea,
nocturnal incontinence and other ailments of the genitourinary tract. It
resembles pepper in local action. A 20 per cent oil of Kava resin in
oil of Sandalwood, called gonosan, is used internally for gonorrhoea.
Being a local anaesthetic it relieves pain and has an aphrodisiac
effect; it has also an antiseptic effect on the urine. The capsules
contain 0.3 gram; two to four can be given several times per day. As
Kava is a strong diuretic it is useful for gout, rheumatism, bronchial
and other ailments, resulting from heart trouble.
Studies suggest kavalactones may have the following effects on the body:
- Reduce anxiety (4Trusted Source)
- Protect neurons from damage (5Trusted Source)
- Reduce pain sensations (5Trusted Source)
- Reduce the risk of cancer, though the evidence is limited to mice
---Dosages---Fluid extract, 1/2 to 1 drachm. Powdered root, 1 drachm. Solid extract, 1 to 15 grains.
Precautions
Specific: Consult a qualified healthcare practitioner before use in pregnancy or lactation, also if you have liver problems, or are taking any medications. Not for use by persons under 18 years of age. Excessive use, or use with products that cause drowsiness, may impair your ability to operate a vehicle or dangerous equipment.
General: We recommend that you consult with a qualified healthcare practitioner before using herbal products, particularly if you are pregnant, nursing, or on any medications.
