When describing the actions of upper respiratory system drugs, a nursing instructor explains that which of the following exerts its effect by increasing the production of secretions, thereby decreasing the viscosity? Select all that apply
A) Benzonatate
B) Guaifenesin
C) Codeine
D) Potassium iodide
E) Dextromethorphan
Ans: A, D
Feedback:
Benzonatate and potassium iodide are expectorants, which increase the production of secretions, thus making the secretions less viscous. Guaifenesin, codeine, and dextromethorphan are antitussives, which suppress cough.
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