title: Shortened duration of action of 1-deamino-8-D-arginine vasopressin (DDAVP) in patients with diabetes insipidus requiring high doses of peroral antidiuretic drugs.
abstract: The antidiuretic effects of graded intravenous and intranasal doses of a new vasopressin analogue (DDAVP) were investigated in two groups of patients with pituitary diabetes insipidus. In the first group, three patients with a high requirement of maintenance doses of peroral anti-diuretic drugs were included; and in the second group, ten patients with a normal (usual) requirement were included. Comparing the antidiuretic responses during 24-hour collection periods, DDAVP, on a microgram basis, was less effective in the "high peroral-dose requirement" patients. The duration of action of single intravenous doses (0.04-24 micrograms) of DDAVP was significantly shortened in the "high peroral-dose requirement" group. However, comparing the peak responses induced by increasing doses of DDAVP in the two groups, there was no demonstrable diminution in the anti-diuretic ability of DDAVP in the "high peroral-dose requirement" patients. Although the possibility of a smaller remnant reserve of ADH was also considered, shortened duration of action ot DDAVP suggests more probably enhanced metabolic breakdown of vasopressin in "high peroral-dose requirement" patients.
mesh_terms: D000328:Adult; D002986:Clinical Trials as Topic; D003894:Deamino Arginine Vasopressin / Q000494:pharmacology* / Q000627:therapeutic use; D003919:Diabetes Insipidus / Q000188:drug therapy / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009994:Osmolar Concentration; D013997:Time Factors; D014667:Vasopressins / Q000031:analogs & derivatives*
chemical_list: D014667:Vasopressins; D003894:Deamino Arginine Vasopressin