Thursday 25 October 2012

Potassium-sparing diuretics

Amiloride
Spironolactone

Indications

In addition to postassium-wasting diuretics
Chronic heart failure (spironolactone)

  • Ascites due to liver disease


Mechanism of action


  • Spironolactone inhibits aldosterone
  • Amiloride blocks renal sodium uptake


Side effects


  • GI disturbance
  • Hyperkalaemia
  • Hyponatraemia
  • Erectile dysfunction
  • Gynaecomastia (spironolactone)
  • Rash


Cautions/contraindications


  • Severe renal impairment
  • Hyperkalaemia
  • Hyponatraemia

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