Effect of Intranasal Vasopressin on Cooperative Behavior in Schizophrenia

Inclusion Criteria: * Age 18-45 years * Diagnosed as Schizophrenia or Schizophreniform disorder as per DSM IV TR * At least 7 years of formal education * MOCA score \>24 Exclusion Criteria: * Diagnoses of SIADH, Diabetes Insipidus * Substance dependence in the past 12 months, excluding nicotine dependence * Current comorbid axis 1 psychiatric disorder * Hypersensitivity or previous allergy to Vasopressin * Serious medical or neurological illness which may interfere with assessment and administration of vasopressin * Hypertension * Impaired renal functions based on serum creatinine above 1.5 * Electrolyte imbalance * Receiving ECT or has received ECT in the past 8 weeks * Clinical history of mental retardation * Pregnancy • Lactation * Risk of harm to self or others * Any significant nasal pathology which may hinder the intranasal absorption of the drug * Hearing or visual impairment that significantly affects the comprehension and execution of the study