| Effect on resting blood pressure and blood pressure homeostasis of short-term administration of the alpha 1-adrenergic receptor antagonist, trimazosin, in hypertension. | |
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MedLine Citation:
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PMID: 2908716 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effects of trimazosin on blood pressure and cardiovascular homeostasis were studied in 12 subjects with untreated essential hypertension of mild or moderate degree. After a 3-day placebo period, the subjects were given trimazosin at the dose of 50, 100, or 200 mg twice daily (7 am and 7 pm) according to a randomized, double-blind crossover protocol. Each treatment was prolonged for 3 days and separated from the subsequent treatment by a 2-day placebo period. Blood pressure (sphygmomanometry) and heart rate were measured at rest during various laboratory maneuvers on the first and third day of the initial placebo, on the first and third day of the drug periods, and on the second day of the intervening placebo periods. Compared to placebo values, trimazosin caused a reduction in systolic and diastolic blood pressure which was well sustained through the time between the morning and the evening administration of the drug and was accompanied by only a slight tachycardia. the antihypertensive effect was similar in the supine and upright position and in both instances it was greater for the 100 or 200 mg twice daily dose than for the 50-mg twice daily dose. The pressor and tachycardic responses to cold pressor test and to isometric and dynamic exercise were unaffected by the various doses of trimazosin whose antihypertensive effect was therefore similarly evident at rest and during behaviorally occurring blood pressure rises.(ABSTRACT TRUNCATED AT 250 WORDS) |
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Authors:
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L Sampieri; C Cuspidi; L Boselli; L Angioni; G Castiglioni; A Zanchetti; G Mancia |
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Publication Detail:
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Type: Clinical Trial; Journal Article; Randomized Controlled Trial |
Journal Detail:
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Title: Cardiovascular drugs and therapy / sponsored by the International Society of Cardiovascular Pharmacotherapy Volume: 1 ISSN: 0920-3206 ISO Abbreviation: Cardiovasc Drugs Ther Publication Date: 1988 Jan |
Date Detail:
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Created Date: 1991-05-01 Completed Date: 1991-05-01 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 8712220 Medline TA: Cardiovasc Drugs Ther Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 535-42 Citation Subset: IM |
Affiliation:
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Istituto di Clinica Medica Generale, Università di Milano, Italy. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adrenergic alpha-Antagonists
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pharmacology,
therapeutic use Aged Antihypertensive Agents / pharmacology*, therapeutic use Blood Pressure / drug effects*, physiology Drug Administration Schedule Exercise Test Female Heart Rate / drug effects Homeostasis / drug effects* Humans Hypertension / drug therapy* Male Middle Aged Piperazines / administration & dosage, pharmacology*, therapeutic use Posture / physiology |
| Chemical | |
Reg. No./Substance:
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0/Adrenergic alpha-Antagonists; 0/Antihypertensive Agents; 0/Piperazines; 35795-16-5/trimazosin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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