Abstract:
AIMS:To assess the age-associated changes over time of plasma paraxanthine/caffeine (PAX/CAF) ratios used as a probe for CYP1A2 activity. METHODS:Intraindividual and interindividual variabilities in PAX/CAF ratio were compared by phenotyping with caffeine, 16 young and 16 elderly healthy subjects on five occasions. RESULTS:PAX/CAF ratio variability was comparable regardless of age (intraindividual CV: 17.6 +/- 6% and 16.2 +/- 5.9%, interindividual CV: 48.1 +/- 2.9% and 42.7 +/- 3.6% in young and elderly, respectively). The PAX/CAF ratio was lower in elderly than in young subjects (95% CI for the difference: 0.004, 0.32) but the difference was not significant in nonsmokers compared separately. CONCLUSIONS:The variability over time of the PAX/CAF ratio is not influenced by age.
journal_name
Br J Clin Pharmacoljournal_title
British journal of clinical pharmacologyauthors
Simon T,Becquemont L,Hamon B,Nouyrigat E,Chodjania Y,Poirier JM,Funck-Brentano C,Jaillon Pdoi
10.1046/j.0306-5251.2001.01494.xkeywords:
subject
Has Abstractpub_date
2001-11-01 00:00:00pages
601-4issue
5eissn
0306-5251issn
1365-2125pii
1494journal_volume
52pub_type
杂志文章abstract:AIMS:To analyse clinical outcomes with direct oral anticoagulants in patients with atrial fibrillation according to geographic region. METHODS:We systematically searched MEDLINE, CENTRAL, websites of regulatory agencies, clinical trials registers and conference proceedings for randomized controlled trials of direct or...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章,meta分析,评审
doi:10.1111/bcp.13005
更新日期:2016-09-01 00:00:00
abstract:PURPOSE:Prescribed daily dose (PDD), the number of doses prescribed to be taken per day, is used to calculate medication adherence using pharmacy claims data. PDD can be substituted by (i) one dose per day (1DD), (ii) an estimate based on the 75th percentile of days taken by patients to refill a script (PDD75 ) or (iii...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/bcp.14468
更新日期:2020-07-08 00:00:00
abstract:AIMS:To compare single- and multiple-dose duloxetine pharmacokinetics between healthy Japanese and Caucasians. METHODS:Twenty-four subjects of each race were given single oral doses of duloxetine (20, 40 and 60 mg) in a randomized, double-blind study. Another 20 subjects of each race received 20, 40 mg or placebo (2 :...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章,随机对照试验
doi:10.1111/j.1365-2125.2006.02770.x
更新日期:2007-03-01 00:00:00
abstract::1. We have utilised a new non-imaging echo-Doppler cardiac output device, using the principle of attenuated compensated volume flow (ACVF), to assess the cardiovascular effects of atenolol and buccal nitroglycerin (NTG) in a placebo-controlled study of 30 patients with coronary disease. 2. Atenolol (4 mg i.v.) reduced...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1365-2125.1990.tb03696.x
更新日期:1990-06-01 00:00:00
abstract::1 Minute ventilation, alveolar PCO2, CO2 production and heart rate were measured in eight normal subjects before and during infusions of noradrenaline 0.2, 1.0 and 5.0 micrograms min-1 and isoprenaline 0.04, 0.2 and 1.0 microgram min-1. 2 These measurements were repeated after propranolol 3.5 mg, atenolol 8 mg or meto...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1982.tb04961.x
更新日期:1982-11-01 00:00:00
abstract::The safe use of Chinese materia medica (CMM) and products in traditional Chinese medicine (TCM) practice conventionally relies on correct pharmacognostic identification, good agricultural and manufacturing practices based on pharmacopoeia standards and rational/correct CMM combinations with TCM-guided clinical prescri...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章,评审
doi:10.1111/bcp.12598
更新日期:2015-10-01 00:00:00
abstract:AIM:Elevated serum creatinine (sCr) and low estimated glomerular filtration rate (eGFR) are associated with poor outcomes in patients with pulmonary arterial hypertension (PAH) whereas sildenafil treatment improves PAH outcomes. This post hoc analysis assessed the effect of sildenafil on kidney function and links with ...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1111/bcp.12616
更新日期:2015-08-01 00:00:00
abstract:AIM:To evaluate safety, tolerability and pharmacokinetics of oral PF-05190457, an oral ghrelin receptor inverse agonist, in healthy adults. METHODS:Single (SAD) and multiple ascending dose (MAD) studies were randomised, placebo-controlled, double-blind studies. Thirty-five healthy men (age 38.2 ± 10.4 years; body mass...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章,随机对照试验
doi:10.1111/bcp.13127
更新日期:2017-02-01 00:00:00
abstract::1. The cardiovascular responses to handgrip exercise have been studied in ten patients with uncomplicated essential hypertension in a randomized crossover study of propranolol and prazosin. 2. Isometric handgrip exercise was performed with a calibrated strain gauge dynamometer at 30% of maximum voluntary contraction f...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1365-2125.1979.tb04720.x
更新日期:1979-10-01 00:00:00
abstract:AIMS:Flavonoids may affect platelet function by several mechanisms, including antagonism of TxA(2) receptors (TP). These TP are present in many tissues and modulate different signalling cascades. We explored whether flavonoids affect platelet TP signalling, and if they bind to TP expressed in other cell types. METHODS...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.2007.02881.x
更新日期:2007-08-01 00:00:00
abstract::The deployment of artesunate for severe malaria and the artemisinin combination therapies (ACTs) for uncomplicated malaria has been a major advance in antimalarial therapeutics. These drugs have reduced treated mortality, accelerated recovery and reduced treatment failure rates and transmission from the treated infect...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章,评审
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更新日期:2020-07-12 00:00:00
abstract::1. Kenyan children with uncomplicated malaria given oral halofantrine (HF; non-micronised suspension; 8 mg base kg-1 body weight 6 hourly for three doses) showed wide variation in the disposition of HF and desbutylhalofantrine (HFm). 2. Eight Kenyan children with severe (prostrate) falciparum malaria who were receivin...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章
doi:10.1111/j.1365-2125.1995.tb04450.x
更新日期:1995-03-01 00:00:00
abstract::The in vitro immunosuppressive effect of deflazacort, a new bone-sparing glucocorticoid, and its biologically active metabolite, 21-deacetyl-deflazacort, was examined on phytohaemagglutinin (PHA) stimulated human peripheral blood lymphocytes (PBL) as well as on natural killer (NK) and killer (K) cell activity. Deflaza...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1986.tb05165.x
更新日期:1986-02-01 00:00:00
abstract::Studies were done to examine the influence of the menstrual cycle on the elimination kinetics of paracetamol. Salivary concentrations of paracetamol were determined after oral administration of 1 g of paracetamol on day 3, 10, 14, 20 and 25 of the menstrual cycle in normal healthy women volunteers with regular menstru...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1987.tb03056.x
更新日期:1987-03-01 00:00:00
abstract::1. We have investigated the effect of repeated s.c. Org 10172 (a low molecular weight heparinoid; Lomoparan) treatment (1000 anti-Xa units twice daily for 5 days) on antipyrine (500 mg orally) metabolism, and the effect of enzyme induction by pentobarbitone (100 mg for 12 days) on the pharmacokinetics and pharmacodyna...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1991.tb05608.x
更新日期:1991-07-01 00:00:00
abstract:AIMS:Spirometry, plethysmography and impulse oscillometry (IOS) measure different aspects of lung function. These methods have not been compared for their ability to assess long- and short-acting anticholinergic agents. We therefore performed a double-blind, placebo-controlled, four-way cross-over study in 30 healthy s...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章,随机对照试验
doi:10.1111/j.1365-2125.2006.02594.x
更新日期:2006-04-01 00:00:00
abstract:AIMS:To estimate the rates of common adverse events in patients treated with the proton pump inhibitors omeprazole, lansoprazole and pantoprazole in general practice in England. METHODS:In prescription-event monitoring cohort studies, data on dispensed prescriptions prescribed by general practitioners in England soon ...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1046/j.1365-2125.2000.00262.x
更新日期:2000-10-01 00:00:00
abstract:AIMS:Antihistamines make up the first line of treatments against motion-sickness. Still, their efficacy and specific mechanism have come into question. The aim of this study was to investigate the effect of meclizine on motion-sensitivity. METHODS:This study was carried out as a triple-blinded randomized trial involvi...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/bcp.14257
更新日期:2020-08-01 00:00:00
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journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1974.tb01694.x
更新日期:1974-12-01 00:00:00
abstract:AIMS:To assess whether hepatic impairment influences the pharmacokinetics of ziprasidone. METHODS:Thirty subjects with normal hepatic function or a primary diagnosis of clinically significant cirrhosis (Child-Pugh A or B) were enrolled into an open-label, multicentre, multiple-dose study. The subjects with chronic, st...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章,多中心研究
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更新日期:2000-01-01 00:00:00
abstract:AIMS:A multistudy analysis of cediranib, a potent, selective inhibitor of all three vascular endothelial growth factor receptors (VEGFR-1, -2 and -3), was conducted to establish population exposure-safety models for the relationship of cediranib exposure to the safety endpoints, diastolic and systolic blood pressure (D...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/bcp.13495
更新日期:2018-04-01 00:00:00
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journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章
doi:10.1111/j.1365-2125.1984.tb02388.x
更新日期:1984-05-01 00:00:00
abstract:AIM:The goal of this study is to present the utility of quantitative modelling for extrapolation of drug safety and efficacy to underrepresented populations in controlled clinical trials. To illustrate this, the stepwise development of an integrated disease/pharmacokinetics/pharmacodynamics model of antipyretic efficac...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/bcp.14326
更新日期:2020-11-01 00:00:00
abstract::1 This study was designed to compare in a double-blind randomized crossover trial, atenolol, labetalol, metoprolol and pindolol. Considerable differences in dose (atenolol 138 +/- 13 mg daily; labetalol 308 +/- 34 mg daily; metoprolol 234 +/- 22 mg daily; and pindolol 24 +/-2 mg daily were required to produce similar ...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1979.tb04774.x
更新日期:1979-04-01 00:00:00
abstract::1. Metoprolol (ME), pindolol (PI) and propranolol (PR) were studied in nine subjects at different doses and at 'maximum beta-adrenoceptor blockade' at a defined exercise load. Exercise tests were performed after each dosing period; isoprenaline stimulation was studied at the highest dose level. 2. ME and PR reduced he...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1365-2125.1980.tb01769.x
更新日期:1980-10-01 00:00:00
abstract:AIMS:Genetic factors, notably CYP2B6 516G→T [rs3745274] and 983T→C [rs28399499], explain much of the interindividual variability in efavirenz pharmacokinetics, but data from Africa are limited. We characterized relationships between genetic polymorphisms and plasma efavirenz concentrations in HIV-infected Black South A...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/bcp.12590
更新日期:2015-07-01 00:00:00
abstract:AIMS:It is estimated that two-thirds of cancer patients will at some point during their illness experience breakthrough pain. In this study, the pharmacokinetics of a novel sublingual dosage form of fentanyl developed for breakthrough pain was evaluated. METHODS:Eleven Caucasian patients (seven male and 4 female, aged...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1365-2125.2004.02264.x
更新日期:2005-02-01 00:00:00
abstract::Plasma concentrations of isoniazid and N-acetylisoniazid were measured at varying times after addition of both compounds to plasma (5 micrograms/ml) and storage at several different temperatures (-70 degrees C, -20 degrees C, 4 degrees C and 20 degrees C). The concentration of both compounds declined log-linearly with...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1111/j.1365-2125.1983.tb01496.x
更新日期:1983-02-01 00:00:00
abstract::1. We have tested the hypothesis that the fall in hepatic mass with age influences the age related increase in sensitivity to warfarin. In 39 otherwise healthy outpatients, aged 50-87 years, stabilised on warfarin for prophylaxis of thromboembolism, age, mean International Normalised Ratio (INR), and mean warfarin dos...
journal_title:British journal of clinical pharmacology
pub_type: 杂志文章
doi:
更新日期:1995-09-01 00:00:00
abstract:AIMS:To investigate the impact of the specific red blood cell binding on the pharmacokinetics and pharmacodynamics of the nucleoside transport inhibitor draflazine after i.v. administration at various infusion rates. It was also aimed to relate the red blood cell (RBC) occupancy of draflazine to the ex vivo measured ad...
journal_title:British journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1046/j.1365-2125.1997.00593.x
更新日期:1997-06-01 00:00:00