Opioid overdose commonly presents with respiratory depression and pinpoint pupils.

• A. Opioid Overdose
• B. Naloxone
• C. Sedative Hypnotics
• D. Benzodiazepines

Answer: (A)

Respiratory depression with pinpoint pupils is a pattern strongly pointing to opioid effects. Opioids act on mu receptors in the brainstem, dampening the brain’s ability to respond to rising CO2, which slows or shallowes breathing. They also cause pupil constriction (miosis) through parasympathetic pathways. This combination—depressed respiration plus miosis—is a classic presentation of opioid overdose and helps distinguish it from other causes of slowed breathing. Naloxone is the reversal agent used to treat opioid overdose, but the question asks what presentation fits opioid overdose, not how to treat it. Other drug classes can depress respiration, but they don’t reliably produce pinpoint pupils.