A Study Investigating Intravenous Human Normal Immune Globulin 10% in Adults With Stiff Person Syndrome
brief summary
The purpose of this study is to evaluate the efficacy and safety of QIVIGY (Intravenous Human Normal Immune Globulin 10%) compared with placebo in adult participants with stiff person syndrome (SPS).
detailed description
This is a phase III, double-blind, placebo-controlled, parallel group, multicenter study to assess the efficacy and safety of QIVIGY in adult participants with stiff person syndrome.
Participants will be randomized in a 1:1 ratio, to receive either 2 g/kg of QIVIGY or equivalent volume of placebo. During the randomized phase, study treatment will be administered every 4 weeks for 24 weeks, at which point the primary efficacy endpoint assessment will be performed at an End of Randomized Treatment visit.
At this study visit, all participants will be given the option to enter an open-label study extension. Participants who choose to continue in the study will receive 2.0 g/kg QIVIGY every 4 weeks, for a duration of 24 weeks.
official title
A Phase III, Randomized, Double-blind, Placebo-Controlled, Parallel Group, Multicenter Study to Assess the Efficacy and Safety of Intravenous Human Normal Immune Globulin (IGIV) 10% in Adult Patients With Stiff Person Syndrome