Best herb to cure cough Vasa/adulsa/Ardusi(अडूसा)is best for cold cough,ashthma too. why? It is natural expectorant,beneficial in recurrent coughs and congested throat can cause a lot of discomfort and disturbs sleep too,it makes you tired and exhausted. Vasa/adulsa relieves cold, cough and flu symptoms instant. It also reduces chest and nasal congestion gets rid of excess sputum and stops nasal discharge. It is also highly effective in treating asthma, bronchitis, sinusitis and other respirator