Picrorhiza

[Dorsch W, Stuppner H, Wagner H, et al. Antiasthmatic effects of Picrorhiza kurroa: Androsin prevents allergen- and PAF-induced bronchial obstruction in guinea pigs. Int Arch Allergy Appl Immunol 1991;95: pp.128-33]

Picrorhiza, in preliminary research and in combination with the drug methoxsalen and sun exposure, was reported to hasten recovery in people with vitiligo, compared to using methoxsalen and sun exposure alone. [Bedi KL, Zutshi U, Chopra CL, Amla V. Picrorhiza kurroa, an Ayurvedic herb, may potentiate photochemotherapy in vitiligo. J Ethnopharmacol 1989;27: pp.347-52]

Picrorhiza is used in India for people with constipation due to insufficient digestive secretions. [Nadkarni KM, Nadkarni AK. Indian Materia Medica. Bombay, Popular Prakashan, 1976, pp.953-5]

The bitter rhizomes of picrorhiza have been used for thousands of years in India for people with indigestion and were considered a substitute for gentian. [Krishnamurthy A. The Wealth of India vol VIII. New Delhi, Publication and Information Directorate, Council of Scientific and Industrial Research, 1969, p.49]

Picrorhiza is used for fever due to all manner of infections. [Nadkarni KM, Nadkarni AK. Indian Materia Medica. Bombay, Popular Prakashan, 1976, pp.953-5]

Picroliv (a mixture of iridoid glycosides from the rhizomes of picrorhiza) has been shown to have an immuno-stimulating effect in hamsters, helping prevent infections. [Puri A, Saxena RP, Sumati, et al. Immunostimulant activity of Picroliv, the iridoid glycoside fraction of Picrorhiza kurroa, and its protective action against Leishmania donovani infection in hamsters. Planta Med 1992;58: pp.528-32]

Open-label studies conducted in India show a preliminary benefit for persons with primarily rheumatoid arthritis. [Langer JG, Gupta OP, Atal CK (1981) "Clinical trials on Picrorhiza kurroa" Ind J Pharmacol 13: pp.98-103 (review)]  More study is needed before any definite conclusions can be drawn.

See also [T Hart BA, Simons JM, Knaan-Shanzer S, et al. Antiarthritic activity of the newly developed neutrophil oxidative burst antagonist apocynin. Free Rad Biol Med 1990;9: pp.127-31]

A series of cases of acute viral hepatitis were reported by one group in India, showing picrorhiza, combined with a variety of minerals, to be helpful in hastening recovery. [Chaturvedi GN, Singh RH. Jaundice of infectious hepatitis and its treatment with an indigenous drug, Picrorhiza kurroa. J Res Ind Med 1966;1: pp.1-13]  A variety of similar reports have appeared in the Indian literature over the years.  Between 400 and 1,500mg of powdered, encapsulated picrorhiza per day has been used in a variety of studies.

A tincture of picrorhiza protected rats against oxidation in the liver. [Anandan R, Devaki T. Hepatoprotective effect of Picrorhiza kurroa on tissue defense system in D-galactosamine-induced hepatitis in rats. Fitoterapia 1999;70: pp.54-7]  This confirmed earlier evidence suggesting picrorhiza contains antioxidant glycosides. [Chander R, Kapoor NK, Dhawan BN (1992) "Picroliv, picroside-I and kutkoside from Picrorhiza kurroa are scavengers of superoxide anions" Biochem Pharmacol 1992;44: pp.180-3]

Two open-label, non-placebo, controlled human studies have shown picrorhiza to be of benefit in asthma. [Indian J Pharmacol 1975;7: pp.95-6, J Postgrad Med 1977;23: pp.118-20]  However, a follow-up double-blind study did not confirm these earlier findings. [J Postgrad Med 1983;29: pp.89-95]

Picrorhiza has been shown to reduce formation of liver cancer due to chemical exposures in animal studies. [Jeena KJ, Joy KL, Kuttan R. Effect of Emblica officinalis, Phyllanthus amarus and Picrorrhiza [sic] kurroa on N-nitrosodiethylamine induced hepatocardinogenesis. Cancer Lett 1999;136: pp.11-6]