Which among the following is a pure antagonist of opioid receptors ?
Correct answer: A. Natrexone
- A. Natrexone
- B. Nalbuphine
- C. Butorphanol
- D. Pentazonice
Explanation
Naltrexone, misspelled in the options as “Natrexone,” is a pure opioid receptor antagonist. Nalbuphine and butorphanol are mixed agonist-antagonists, while pentazocine is also not a pure antagonist.
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