Cigarette use, drinking and voiding in schizophrenic patients with polydipsia and hyponatremia.

Pre-smoking versus post-smoking amounts of drinking and voiding were compared in ten state hospital patients with schizophrenia and polydipsia. Cigarette use was significantly correlated with total amount drunk but was not associated with increased drinking or decreased voiding immediately following smoking. These findings revealed no nicotine effects upon thirst drive or urinary output, but suggest that drinking and smoking represent associated repetitive behaviors.