Paper I
2013 April (2010 Scheme) · 40 marks · 180 min

Question

Nicorandil

Q73 marksShort Notes

Answer

  • Nicorandil is an antianginal drug with a dual mechanism:
    • Nitrate-like action: Releases nitric oxide → venodilatation → reduced preload
    • K⁺ATP channel opener: Opens ATP-sensitive potassium channels in vascular smooth muscle → arteriolar dilatation → reduced afterload
    • Also produces coronary vasodilatation, including of epicardial coronary arteries (useful in vasospastic angina)
  • Uses: Prophylaxis and treatment of angina pectoris (stable and vasospastic)
  • Adverse effects: Headache, flushing, oral and GI ulceration, hypotension
  • Unlike conventional nitrates, tolerance develops less readily

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