An inhaler is a medical device used to deliver medication directly into the lungs. It is commonly prescribed for individuals with respiratory conditions such as asthma or chronic obstructive pulmonary disease (COPD). Inhalers can come in different forms, including metered-dose inhalers (MDIs) and dry powder inhalers (DPIs), each designed to release a specific dose of medication. Using an inhaler involves breathing in the medication deeply to ensure it reaches the airways effectively. Proper technique is essential for the medication to work as intended. Inhalers may contain bronchodilators, which help open the airways, or corticosteroids, which reduce inflammation in the lungs.