Vasarishta(Vas-arishta) is arishta in ayurveda that is used for condition of cold, cough, asthma, and other chest related problems.
Arishta are basically fermented decoction in ayurveda that are prepared by boiling herbs in water and then allowed fermentation that give them better therapeutic properties and improved drug dethe livery when consumed.
Vasak , Chaturjat, Sonth, Marich, Kababchini, Pipal, Sugandhabala, dhataki, and jaggery
Therapeutic uses are Expectorant, antipyretic, antispasmodic and Useful in cough, cold, bronchitis, asthma and other chest affections
15 to 30 ml with an equal quantity of water
You can buy this product from medical store or online.