title: Controlled-release doxazosin as combination therapy in hypertension: the GATES study.
abstract: Doxazosin gastrointestinal therapeutic system (GITS) or placebo was added to the antihypertensive therapy of uncontrolled hypertensive patients in a prospective, randomized, double-blind trial. Patients received doxazosin GITS 4 mg/d (n=89) or placebo (n=86) for 6 weeks in addition to entry antihypertensive medication. Doxazosin GITS was increased to 8 mg/d after 2 or 4 weeks if patients did not respond (sitting blood pressure <140/90 mm Hg and 10/10-mm Hg decrease from baseline). Reductions from baseline in sitting and standing blood pressures were greater with doxazosin GITS than placebo at all time points (p</=0.017) except Week 1 sitting systolic pressure (p=0.068). The response rate was greater in the doxazosin GITS group (37.3%) than the placebo group (10.7%; p<0.001). With the exception of postural hypotension (7% compared with 0.0%), the frequency of adverse events was similar for doxazosin GITS and placebo. Doxazosin GITS was effective as combination antihypertensive therapy with the major classes of antihypertensive agents.
authors.affiliation: Rush-Presbyterian-St. Luke's Medical Center, Chicago, IL 60612, USA. hblack@rush.edu
authors.forename: Henry R
authors.initials: HR
authors.lastname: Black
authors.forename: Michael
authors.initials: M
authors.lastname: Keck
authors.forename: Peter
authors.initials: P
authors.lastname: Meredith
authors.forename: Kevin
authors.initials: K
authors.lastname: Bullen
authors.forename: Sheila
authors.initials: S
authors.lastname: Quinn
authors.forename: Andrew
authors.initials: A
authors.lastname: Koren
mesh_terms: D000317:Adrenergic alpha-Antagonists / Q000009:adverse effects / Q000494:pharmacology / Q000627:therapeutic use*; D000368:Aged; D000959:Antihypertensive Agents / Q000009:adverse effects / Q000494:pharmacology / Q000627:therapeutic use*; D003692:Delayed-Action Preparations; D017292:Doxazosin / Q000009:adverse effects / Q000494:pharmacology / Q000627:therapeutic use*; D004359:Drug Therapy, Combination; D005260:Female; D041981:Gastrointestinal Tract / Q000187:drug effects; D006801:Humans; D006973:Hypertension / Q000188:drug therapy*; D008297:Male; D008875:Middle Aged; D010919:Placebos; D012449:Safety; D016896:Treatment Outcome
chemical_list: D000317:Adrenergic alpha-Antagonists; D000959:Antihypertensive Agents; D003692:Delayed-Action Preparations; D010919:Placebos; D017292:Doxazosin