What is the role of naloxone in opioid overdose?

• A. Reverses opioid-induced respiratory depression.
• B. Prevents liver damage from opioids.
• C. Reduces alcohol withdrawal symptoms.
• D. Enhances analgesia.

Answer: (A)

Naloxone works by blocking the effects of opioids at the brain’s receptors. In an overdose, opioids bind to these receptors and slow breathing and depress consciousness. Naloxone is an antagonist that binds to the same receptors with high affinity and displaces the opioids, rapidly reversing the respiratory depression and other overdose effects. It acts quickly when given by injection or nasal spray, which is why it’s used as an emergency rescue medicine. Because naloxone’s duration can be shorter than the opioid’s, breathing can depress again as the naloxone wears off, so monitoring and possible repeat dosing are important. This option doesn’t address liver damage, alcohol withdrawal, or enhanced pain relief—its role is specifically to block opioid effects and restore breathing.