Nalbuphine Is an Effective Pain Reliever Because of Its Activity

question 1

Multiple Choice

Nalbuphine is an effective pain reliever because of its activity at mu-opioid receptors. However, if given to a patient who has recently received morphine (which also affects mu-opioid receptors) for postoperative pain, nalbuphine can worsen his or her pain. Thus nalbuphine is said to have what kind of activity at mu-opioid receptors?

• A) Full agonist
• B) Partial agonist
• C) Competitive antagonist
• D) Non-competitive antagonist
• E) Allosteric modifier

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