Home Herbs Index A Arosa (Adhatoda vasica) (Vasaka) AllABCDEFGHIJKLMNOPQRSTUVWXYZ Arosa (Adhatoda vasica) (Vasaka) Pharmacological action: Expectorant and antispasmodic. Medicinal use: Effective in cough, chest congestion, asthma, tuberculosis.