The symptoms you described?excessive sleep, social withdrawal, and spitting?are likely side effects of his current medications, which typically include a mood stabilizer (like divalproex sodium) and an antipsychotic. Oversedation can cause isolation, while spitting may be due to medication-induced excess saliva. Please consult his psychiatrist promptly. They may consider reducing his doses, switching to less sedating alternatives, or adding treatments to manage saliva production. Additionally, psychosocial support or therapy can help him gradually rebuild social skills. Please do not alter his medications without professional guidance, as sudden changes can cause a relapse.