Its principal constituents are the several alkaloidspresent of which the major constituent is a quinazoline alkaloid, vasicine. The leaves are rich in vitamin C and carotene and yield an essential oil. The shrub is the source of the drug, well known in indigenous systems of medicine for its beneficial effects, particularly in bronchitis. The leaves, flowers, fruits and roots are extensively used for treating cold, cough, whooping-cough, chronic bronchitis and asthma.

It acts as a sedative-expectorant, antispasmodic and anthelmintic. The leaf-juice is stated to cure diarrhea, dysentery and glandular tumors, and is given as an emmenagogue. The powder is reported to be used as a poultice on rheumatic joints, as a counter-irritant on inflammatory swellings, on fresh wounds, urticaria and in neuralgia.

The leaves, roots and flowers and active principles of the plant possess a number of pharmacological properties and are used in cough, chronic bronchitis, rheumatism, asthma and bronchial asthma. It is a bronchial antiseptic, bronchodilator and expectorant.

Action:
A unique herb that helps support the bronchial function with broncho dilatory, expectorant and mucolytic properties. It restores lung function. 

Indications:
Vasaka is beneficial in
1.bronchitis
2.bronchial asthma
3.persistent dry cough

Dosage:
1 capsule twice a day after meals with water.