An Extension Study Designed to Assess Effects of Losartan on Proteinuria in Pediatric Populations (MK-0954-326 AM1,EXT1(AM2))

"Losartan Use During the Double-Blind Treatment Phase:~Losartan potassium was administered orally as tablets; 25 or 50 milligrams (mg); or as a liquid suspension 2.5 mg/mL prepared for participants who weighed less than 25 kilograms (kg) or for those participants unable to swallow tablets. During the double-blind period, participants were initially randomized to either a once-daily weight-dependent dose of approximately 0.7 mg/kg (25 mg tablet; up to 50 mg per day) and at 2-weeks the dose was increased to a once-daily maximum weight-dependent dose of 1.4 mg/kg. The maximum dose of losartan, as specified in the protocol, was 50 mg/day (if the patient weighed \<50 kg)~or 100 mg/day (if the patient weighed ≥50 kg).~Losartan Use During the Treatment Extension Phase:~Dose modifications of the drug were left up to the discretion of the Investigators based on each participant's level of tolerance."

Placebo (losartan suspension), administered orally, once daily for 12 weeks

Amlodipine besylate (1 mg/mL) liquid suspension, oral administration, titrated to 0.2 mg/kg/day (5 mg maximum dose) per day for 12 Weeks

Liquid suspension, 1mg/mL, titrated to 0.2 mg/kg/day (5 mg maximum dose) once daily, for 12 weeks

Normotensive patients randomized to losartan placebo for 12 weeks.

Enalapril 2.5-, 5-, 10-, and 20-mg tablets or enalapril suspension (1 mg/mL), oral administration, once daily for 36 months.