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

Effect of Intranasal Vasopressin on Cooperative Behavior in Schizophrenia