Ventolin generic inhaler is a short-acting bronchodilator that relaxes constricted airways. It provides relief from asthma symptoms and physical exertion-induced breathlessness by relaxing lung muscles, increasing airflow capacity, and reducing breathing difficulties. The effects are noticeable within 5 to 15 minutes and last up to 4 to 6 hours. To use it effectively, shake the inhaler before each dose, hold it upright while taking a deep breath in as you press the canister, then hold your breath for several seconds to allow the medication to settle into your lungs. Learn more about Ventolin generic inhaler.