Effect of dDAVP infusion in Alzet pump on hydroosmotic parameters of DI rats. Each result is expressed as the mean ± sem of values of daily diuresis (A), urine osmolality (B), and water intake (C). *, P < 0.05; **, P < 0.01, and ***, P < 0.001 vs. untreated DI in respective time (n = 3 rats/group).