Metolazone Use in Refractory Heart Failure

Clinical Efficacy and Safety

• The American Heart Association suggests that metolazone can be used in combination with loop diuretics for enhanced effect in refractory heart failure, as the combination produces marked diuresis in some patients where edema or ascites was refractory to treatment with maximum recommended doses of these or other diuretics administered alone 1
• The European Society of Cardiology recommends that in patients with GFR < 30 mL/min, thiazide diuretics are generally not recommended as monotherapy, except when prescribed synergistically with loop diuretics 2
• The American College of Cardiology recommends that for most heart failure patients, the standard approach is to use loop diuretics as first-line therapy, with metolazone added only when diuresis is inadequate 3

Dosing and Monitoring

• The initial metolazone dose should be low (2.5 mg) with careful titration as needed, according to Praxis Medical Insights 1
• The maximum recommended daily dose is 10 mg, as stated by Praxis Medical Insights 1