An open comparative study of two diuretic combinations, frusemide/amiloride (‘Frumil’) and bumetanide/potassium chloride (‘Burinex’ K), in the treatment of congestive cardiac failure in hospital out-patients

SummaryForty elderly patients, aged 68 to 89 years, with congestive cardiac failure, who were attending a hospital out-patients department, entered an open, parallel group, comparative study of two diuretic combinations, 40 mgfrusemide plus 5 mg amiloride per tablet and 0.5 mg bumetanide plus 573 mg slow-release potassium chloride per tablet. Patients were assigned at random to receive one or other combination for 8 weeks, dosage being determined by the severity of the individual patient's condition (range 1 to 3 tablets frusemide/amiloride; 2 to 6 tablets bumetanide/potassium chloride). Clinical assessments, including visual analogue scores for dyspnoea at rest and on effort, and laboratory measurements of serum potassium and magnesium levels were carried out on entry and after 2, 4 and 8 weeks of treatment. Other variables were monitored before, during and/or after treatment. Although significant decreases were reported in dyspnoea severity scores at rest and on effort only in the bumetanide/potassium c...