title: Diuretic actions in man of a selective kappa opioid agonist: U-62,066E.
abstract: The effect of a selective kappa opioid agonist, U-62,066E, on urine formation in human volunteers was assessed. Volunteers received single intramuscular injections of either placebo or 2, 3, 4, 5 or 6 micrograms/kg of U-62,066E in a randomized, double-blind study. U-62,066E caused dose-dependent maximal increases in urine volume of 2.6 times control in the first 4 hr after administration. A corresponding decrease in urine osmolality to 20% of base-line values occurred. No changes in total urinary Na, K or Cl excretion were identified. Kappa agonists produce a water-only diuresis at low doses in humans. The mechanism of this effect was not examined in this study but probably relates to alterations in antidiuretic hormone activity.
mesh_terms: D000293:Adolescent; D000328:Adult; D002712:Chlorides / Q000652:urine; D004231:Diuresis / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D006801:Humans; D008297:Male; D008875:Middle Aged; D011188:Potassium / Q000652:urine; D011759:Pyrrolidines / Q000494:pharmacology*; D011897:Random Allocation; D011957:Receptors, Opioid / Q000378:metabolism*; D017473:Receptors, Opioid, kappa; D012964:Sodium / Q000652:urine; D014554:Urination / Q000187:drug effects
chemical_list: D002712:Chlorides; D011759:Pyrrolidines; D011957:Receptors, Opioid; D017473:Receptors, Opioid, kappa; D012964:Sodium; C051272:spiradoline; D011188:Potassium