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What Is Osha Used for Today?
Osha is frequently recommended for use at the first sign of a respiratory infection. Like a sauna, it will typically induce sweating, and according to folk wisdom this may help avert the development of a full-blown cold . Osha is also taken during respiratory infections as a cough suppressant and expectorant, hence the common name "Colorado cough root." However, there have not been any double-blind placebo-controlled studies to verify these proposed uses. (For information on why double-blind studies are so important, see Why Does This Database Rely on Double-blind Studies? ),
Chinese research suggests that Ligusticum wallichiican relax smooth muscle tissue (perhaps thereby moderating the cough reflex) and inhibit the growth of various bacteria. 1 Whether these findings apply to osha as well is unknown.
Like other bitter herbs, osha is said to improve symptoms of indigestion and increase appetite.
- Bensky D, Gamble A, Kaptchuk TJ. Chinese Herbal Medicine: Materia Medica. Seattle, Wash: Eastland Press; 1986:383–384.