Budesal 0.5mg Respules 2ml (Levosalbutamol 0.5mg) is used for the treatment of asthma and chronic obstructive pulmonary disorder (a lung disorder in which the flow of air to the lungs is blocked). It helps in relaxing the muscles of the air passages and making it easier to breathe. It relieves coughing, wheezing and feeling short of breath.