This document discusses 3 types of respiratory drugs - mucolytics, bronchodilators, and corticosteroids. Mucolytics thin mucus making it easier to cough up, bronchodilators relax airways to improve breathing, and corticosteroids reduce inflammation. Side effects of these drugs include upset stomach, difficulty breathing, and dry mouth. The document provides details on short and long-acting versions of bronchodilators and systemic, oral, and injectable forms of corticosteroids and the conditions each type treats.