Orthosiphon spicatus (Thunb.) Bak. (Lamiaceae) is a South East Asian plant which is used against kidney and urinary tract diseases, such as bladder and kidney inflammation (1). The drug Orthosiphonis Folium is described in the German (DAB 8) and Swiss (Pharm. Helv. VI) Pharmacopoeias. A number of lipophilic flavonoids have been found in the drug (2-6);
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