People with asthma have difficulty breathing. These people easily react to things like dust, pollen, and smoke due to extra sensitive lungs. Breathing these things causes the lungs to get inflamed, swollen, and irritated. So, air does not get in and out freely of the lungs and makes you cough, wheeze, or feel like you can't catch your breath. So, to relieve these symptoms, the doctor prescribes Asthalin Inhaler.