Question

pharmacology made easy 5.0 the respiratory system test question: 18 of 25 time remaining: 16:06:27 a nurse should identify that dextromethorphan can have which of the following effects when combined with morphine? reduced antitussive effect of dextromethorphan potentiation of depression of cns actions increased renal reabsorption of the dextromethorphan delayed analgesic effect of the opioid

Explanation:

Dextromethorphan and morphine both act on the central nervous system (CNS). Morphine is an opioid with CNS - depressant effects, and dextromethorphan also has CNS - related actions. When combined, their CNS - depressant actions can be potentiated (enhanced). The first option is incorrect as the combination doesn't reduce dextromethorphan's antitussive effect. The third option is incorrect as there's no mechanism for increased renal reabsorption of dextromethorphan in this combination. The fourth option is incorrect as the combination doesn't delay the analgesic effect of the opioid.

Answer:

B. Potentiation of depression of CNS actions