Asmalin HFA is a metered-dose inhaler (MDI) delivering 100 micrograms of Salbutamol, a short-acting β₂-adrenergic receptor agonist. It is designed for rapid relief of bronchospasm in conditions such as asthma and chronic obstructive pulmonary disease (COPD). By relaxing the smooth muscles of the airways, it facilitates easier breathing within minutes of administration.