Daily compared with alternate-day levamisole in pediatric nephrotic syndrome: an open-label randomized controlled study.

Abstract

Levamisole is less expensive and has a better toxicity profile compared to other steroid sparing agents used in nephrotic syndrome. It has a plasma half-life of 2.0 to 5.6hours, but is conventionally administered on alternate days. We aimed to assess whether daily levamisole is safe and more effective than standard alternate-day therapy in maintaining remission in children with frequently relapsing or steroid-dependent nephrotic syndrome (FR/SDNS). An open-label randomized controlled trial was conducted in children with FR/SDNS. Group A received daily while Group B received alternate-day levamisole (2-3mg/kg/dose) for 12months. Prednisolone was tapered off by 3months. Patients were monitored for relapses, further steroid requirement, and adverse effects. A total of 190 children with FR/SDNS (94 in Group A and 96 in Group B) were analyzed. Sustained remission for 12months was observed in 36% of Group A and 27% of Group B patients (p = 0.18). Numbers completing 12months in the study were 67% in Group A and 56% in Group B (p = 0.13). Time to first relapse, persistent FR/SDNS, and withdrawal due to poor compliance were statistically similar in both groups, while relapse rate and cumulative steroid dosage were significantly lower in Group A compared to Group B (p = 0.03 and p = 0.02, respectively). The incidence of adverse effects was comparable in both groups, with reversible leucopenia and hepatic transaminitis being the commonest. Daily levamisole therapy was not superior to alternate-day therapy in maintaining sustained remission over 12months. Nevertheless, relapse rate and cumulative steroid dosage were significantly lower without increased adverse effects.