Question

Which of the following is an opioid-like agonist?

• A. \( \text{Phenobarbital} \)
• B. \( \text{Diltiazem} \)
• C. \( \text{Pemoline} \)
• D. \( \text{Propoxyphene} \)

Hint:

Opioid agonists activate receptors to relieve pain, while opioid antagonists block receptor activity, reversing opioid effects.

Answer 1

The Correct Option is D

Propoxyphene is a weak opioid agonist that binds to opioid receptors, exerting analgesic effects. Unlike strong opioids like morphine, propoxyphene has lower abuse potential but can still cause respiratory depression. It was historically used for moderate pain relief but has been discontinued due to safety concerns.