Gazwan Herb is also known as Onosma bracteatum Wall, Gojihva, Gaozaban. It can be found in the Asia, Europe and Mediterranean regions. It is widely used as a Ayurveda herb that can cure pulmonary infections, Kidney Stones and Kidney Disease. Gazwan contains potassium, calcium and other minerals, which give the herb its pharmacological properties. As an expectorant, it also cures the symptoms of the common cough and bronchitis.