Heart failure in older infants and children Therapies often include a diuretic (eg, furosemide 0.5 to 1 mg / kg IV or 1 to 3 mg / kg orally every 8 to 24 hours, titrated upward as needed) and an ACE inhibitor (eg, captopril 0.1 to 0.3 mg / kg orally 3 times a day).