RecruitingPhase 3Drug trialA Study to Evaluate the Long-term Safety and Tolerability of KarXT and KarX-EC for the Treatment of Schizophrenia and Autism-Related Irritability in Adolescents, RespectivelyThe purpose of this study is to evaluate the long-term safety and tolerability of KarXT and KarX-EC for the treatment of Schizophrenia and autism-related irritability in adolescents, respectively