Duolin respules is prescribed for treatment & prevention of COPD & asthma. It has been formulated having levosalbutamol & ipratropium bromide as active ingredients that have ability to activate beta-2 adrenergic receptors. This activity results in increase of cyclic AMP which inturn relaxes muscles. It is greatly admired for assuring targeted mode of action with excellent effectiveness. Duolin respules offered by us is said to produce uniform size droplets at optimum pressure that result in their uniform distribution. It gets metabolized in liver and shows elimination half life of about 3.3 to 4 hours with urinary excretion.