Document Detail

Ambulatory blood pressure control with bedtime aspirin administration in subjects with prehypertension.
MedLine Citation:
PMID:  19407805     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Aspirin has been found to prevent angiotensin II-induced hypertension and to induce nitric oxide (NO) release from vascular endothelium. Low-dose aspirin has also been shown to reduce blood pressure (BP) when administered at bedtime, as opposed to upon awakening, in untreated hypertensive patients and high-risk pregnant women. Accordingly, we investigated the effects on ambulatory BP of aspirin administered at different times of the day in prehypertension.
METHODS: We studied 244 subjects with prehypertension, 43.0 +/- 13.0 years of age, randomly divided in three groups: nonpharmacological hygienic-dietary recommendations; the same recommendations and aspirin (100 mg/day) on awakening; or the same recommendations and aspirin at bedtime. BP was measured for 48 consecutive hours before and after 3 months of intervention.
RESULTS: Ambulatory BP was unchanged in subjects randomized to either nonpharmacological intervention or aspirin on awakening. A significant ambulatory BP reduction was, however, observed in the subjects who received aspirin at bedtime (decrease of 6/3 mm Hg in the 24-h mean of systolic (SBP)/diastolic BP (DBP), respectively; P < 0.001), without changes in heart rate (HR) from baseline. BP was homogeneously controlled along the 24 h after bedtime aspirin administration (6/4 mm Hg reduction in activity mean of SBP/DBP; 6/3 mm Hg reduction in sleep-time mean, respectively).
CONCLUSIONS: This prospective trial documents a significant effect on BP of low dose aspirin only when ingested at bedtime by prehypertensive subjects. The timed administration of low-dose aspirin could thus provide a valuable and cost-effective approach for BP control in subjects at elevated risk of developing hypertension.
Ramón C Hermida; Diana E Ayala; Artemio Mojón; José R Fernández
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't     Date:  2009-04-30
Journal Detail:
Title:  American journal of hypertension     Volume:  22     ISSN:  1941-7225     ISO Abbreviation:  Am. J. Hypertens.     Publication Date:  2009 Aug 
Date Detail:
Created Date:  2009-07-29     Completed Date:  2009-10-05     Revised Date:  2011-06-30    
Medline Journal Info:
Nlm Unique ID:  8803676     Medline TA:  Am J Hypertens     Country:  United States    
Other Details:
Languages:  eng     Pagination:  896-903     Citation Subset:  IM    
Bioengineering and Chronobiology Laboratories, University of Vigo, Vigo, Spain.
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MeSH Terms
Aspirin / administration & dosage*,  therapeutic use*
Blood Pressure / drug effects
Circadian Rhythm / physiology
Double-Blind Method
Endpoint Determination
Heart Rate / drug effects
Hypertension / drug therapy*,  physiopathology
Middle Aged
Motor Activity / physiology
Platelet Aggregation Inhibitors / administration & dosage*,  therapeutic use*
Prospective Studies
Sleep / physiology
Time Factors
Reg. No./Substance:
0/Platelet Aggregation Inhibitors; 50-78-2/Aspirin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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