Justicia adhatoda, commonly known in English as Malabar nut, adulsa, adhatoda, vasa, or(বাসক) vasaka, is a medicinal plant native to Asia, widely used in Siddha Medicine, Ayurvedic, homeopathy and Unani systems of medicine
This shrub has a number of traditional medicinal uses in Siddha Medicine, Ayurvedic and Unani systems of medicine. Drug vasaka is obtained from dried leaves of the plant. Vasaka is mainly used in treatment of chronic bronchitis and asthma. Leaf juice is given in the treatment of dysentery and diarrhoea.