Which overdose is most closely associated with the triad of hypotension, slowed respiration, and pinpoint pupils?

Which overdose is most closely associated with the triad of hypotension, slowed respiration, and pinpoint pupils?

• A. Amitriptyline
• B. Oxycodone
• C. Alcohol
• D. Methamphetamine

Answer: (B)

Overdose from opioids shows a distinctive triad: slowed respiration, pinpoint pupils, and low blood pressure. Opioids like oxycodone suppress the brainstem centers that drive breathing and cause miosis (small, pinpoint pupils) through increased parasympathetic activity. They can also lead to hypotension due to vasodilation and reduced sympathetic tone. So, an overdose of oxycodone fits this pattern exactly. Other substances don’t align with all three signs: amitriptyline overdose tends to produce anticholinergic effects such as dry skin, dilated pupils, and tachycardia rather than the classic triad; alcohol overdoses can slow respiration but don’t typically cause pinpoint pupils; methamphetamine overdoses cause agitation, hypertension, and dilated pupils, not pinpoint pupils.

Overdose from opioids shows a distinctive triad: slowed respiration, pinpoint pupils, and low blood pressure. Opioids like oxycodone suppress the brainstem centers that drive breathing and cause miosis (small, pinpoint pupils) through increased parasympathetic activity. They can also lead to hypotension due to vasodilation and reduced sympathetic tone. So, an overdose of oxycodone fits this pattern exactly.

Other substances don’t align with all three signs: amitriptyline overdose tends to produce anticholinergic effects such as dry skin, dilated pupils, and tachycardia rather than the classic triad; alcohol overdoses can slow respiration but don’t typically cause pinpoint pupils; methamphetamine overdoses cause agitation, hypertension, and dilated pupils, not pinpoint pupils.