Paper I
2017 August (Supplementary) (2010 Scheme) · 40 marks · 120 min

Question

Enumerate five groups of anti- hypertensive drugs with examples of each. Discuss the mechanism of action, adverse effects and therapeutic uses of any one of them. (2+2+1+1)

Q16 marksEssays

Answer

Five groups of antihypertensive drugs with examples

  • Diuretics: Hydrochlorothiazide
  • Beta blockers: Atenolol
  • ACE inhibitors: Enalapril
  • Calcium channel blockers: Amlodipine
  • Angiotensin receptor blockers: Losartan

Mechanism, adverse effects and uses of ACE inhibitors (Enalapril)

Mechanism: Inhibits angiotensin-converting enzyme, blocking conversion of angiotensin I to angiotensin II — reduces vasoconstriction (↓afterload) and aldosterone-mediated Na⁺/water retention (↓preload); also prevents bradykinin breakdown, contributing to efficacy and the characteristic dry cough

Adverse effects: Dry cough, hyperkalaemia, first-dose hypotension, angioedema, teratogenic (contraindicated in pregnancy), acute renal failure in bilateral renal artery stenosis

Uses: Hypertension, congestive cardiac failure (improves survival), post-MI, diabetic nephropathy (renoprotective)

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