title: Disposition of guanethidine during chronic oral therapy.
abstract: The plasma level and urinary excretion rate of guanethidine have been measured in 30 patients during oral maintenance therapy, and in 5 patients following discontinuous of therapy. A significant correlation was found between the daily average urinary excretion and the maintenance dose, although wide interindividual variation was noted among patients maintained on the same dose. A statistically significant correlation was also observed between the area under the plasma level curve during the dose interval and the oral maintenance dose. After discontinuation of chronic therapy, the half-life of 1.5 days of the initial phase of elimination was essentially in agreement with the half-life of almost 2 days determined in acute studies. In addition, a second phase of elimination with a half-life of 4 to 8 days was observed.
mesh_terms: D000284:Administration, Oral; D002986:Clinical Trials as Topic; D006145:Guanethidine / Q000008:administration & dosage / Q000378:metabolism* / Q000627:therapeutic use; D006801:Humans; D006973:Hypertension / Q000188:drug therapy; D013997:Time Factors
chemical_list: D006145:Guanethidine