title: Prazosin, pharmacokinetics and concentration effect.
abstract: The pharmacokinetics and effects of prazosin have been studied after intravenous and oral dosing (1 mg) to 6 normal male volunteers. The mean terminal (beta) half-life was 2.9 h after intravenous and oral routes. Oral bioavailability was 56.9%. The effects of prazosin on blood pressure were more pronounced after intravenous than oral administration, and the hypotensive effect greater on erect blood pressure. There was a significant correlation (P less than 0.02) between the fall in blood pressure and the plasma drug concentration after intravenous prazosin.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D001682:Biological Availability; D001794:Blood Pressure / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D006207:Half-Life; D006801:Humans; D007275:Injections, Intravenous; D007700:Kinetics; D008297:Male; D011224:Prazosin / Q000008:administration & dosage / Q000378:metabolism*; D011674:Pulse / Q000187:drug effects; D011799:Quinazolines / Q000378:metabolism*; D013997:Time Factors
chemical_list: D011799:Quinazolines; D011224:Prazosin