Paper I
2024 December (Supplementary) (2019 Scheme) · 100 marks · 180 min

Question

The following opioid is contraindicated in myocardial infarction as an analgesic due to its sympathomimetic properties:

  • a) Morphine
  • b) Pethidine
  • c) Fentanyl
  • d) Pentazocine Question Numbers (vi) – (x) are Multiple Response Type. Read the statements and mark the answers appropriately.
Qv1 marksMCQs

Answer

Correct answer: b) Pethidine

Pethidine has an atropine-like (anticholinergic) action that produces tachycardia and can also release histamine, unlike morphine, which is vagotonic and tends to produce bradycardia — a hemodynamic profile more favourable in myocardial infarction. Pethidine’s sympathomimetic/tachycardic tendency increases myocardial oxygen demand, making it a poorer choice than morphine for MI-related pain.

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