Naloxone is commonly used to reverse overdose from which type of drug?

• A. Opioids
• B. Stimulants
• C. Alcohol
• D. Benzodiazepines

Answer: (A)

Naloxone reverses overdoses by blocking opioid receptors in the brain. In an opioid overdose, drugs like heroin or fentanyl depress the brain’s breathing centers by activating mu-opioid receptors. Naloxone binds to those receptors with high affinity, displacing the opioids and rapidly restoring normal breathing and consciousness. This is why it’s the go-to treatment for suspected opioid overdoses—the mechanism directly counteracts the cause.

It’s important to note that overdoses from stimulants, alcohol, or benzodiazepines involve different systems and mechanisms, so naloxone wouldn’t reliably reverse those overdoses. If a mixed overdose is suspected, naloxone can help identify whether opioids are involved, but additional supportive care is essential for the other substances.