RecruitingPhase 2Drug trialTargeting the Neurobiology of RRB in Autism Using N-acetylcysteine: Single-doseThe goal of this study is to target the neurobiology of restricted and repetitive behaviors in children with autism spectrum disorder using N-acetylcysteine (NAC), a well-tolerated nutritional supplement that has shown promise for reducing symptom severity in recent small-scale trials. The findings from this research will shed light on the mechanisms of action underlying the clinical benefits of NAC.