Initial Treatment for Nephrotic Syndrome in Adolescents

Treatment Protocol

The American Academy of Pediatrics recommends beginning oral prednisone at 60 mg/m²/day (or 2 mg/kg/day) with a maximum of 60 mg daily as a single morning dose for 6 weeks, followed by 40 mg/m² on alternate days for another 6 weeks, then taper over 4 weeks for a total treatment duration of 16 weeks 1, 2, 3
Administer prednisone 60 mg/m²/day or 2 mg/kg/day as a single daily dose (maximum 60 mg/day) for the full 6 weeks regardless of when remission occurs 1, 2
Continue this daily dosing for the full 6 weeks, and remission is defined as urine protein <1+ on dipstick for 3 consecutive days or urine protein-to-creatinine ratio <200 mg/g 1, 2, 3

Adolescents diagnosed with nephrotic syndrome after age 12 years require kidney biopsy before initiating treatment, as they are more likely to have secondary causes or non-minimal change disease 1, 2
If no remission is achieved by 6 weeks of daily prednisone, the diagnosis of steroid-resistant nephrotic syndrome (SRNS) is confirmed, and a minimum of 8 weeks of corticosteroid treatment is needed to definitively define steroid resistance 1, 2

Treat infrequent relapses with prednisone 60 mg/m²/day (maximum 60 mg/day) until remission for at least 3 consecutive days, then switch to alternate-day prednisone 40 mg/m² for 4 weeks 1, 2, 3, 4
Consider steroid-sparing agents rather than continuing corticosteroids alone for frequent relapses or steroid-dependent disease, with levamisole as the first-line agent (if available), followed by cyclophosphamide 1, 2, 3, 4

Use calcineurin inhibitors (cyclosporine or tacrolimus) as initial second-line therapy for steroid-resistant disease, and require kidney biopsy in all children with SRNS except those with known infection/malignancy-associated disease or confirmed genetic causes 1, 2, 4
Genetic testing should be obtained as soon as possible, ideally within 2 weeks of confirming steroid resistance 1, 2

Do not use the shorter 8-week regimen (4 weeks daily + 4 weeks alternate-day) as this significantly increases relapse risk, and longer initial treatment courses (up to 6-7 months) further reduce relapse rates without increasing adverse effects 1, 2, 3
During upper respiratory tract infections in children with frequent relapses, consider daily prednisone 0.5 mg/kg/day for 5-7 days to reduce relapse risk 3