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UNIT-4- Drugs acting on respiratory system Introduction to Drugs Acting on the Respiratory System Introduction The respiratory system is responsible for oxygen exchange and removal of carbon dioxide. Various conditions such as asthma, chronic obstructive pulmonary disease (COPD), respiratory infections, and allergic reactions require pharmacological intervention. Drugs acting on the respiratory system help in bronchodilation, reducing inflammation, thinning mucus, and suppressing cough to improve breathing and manage respiratory diseases. These