Abstract:
:The influence of time of drug administration on pharmacokinetics of theophylline was studied both after ingestion of a sustained-release tablet, containing choline theophyllinate ( Zy 15061-S. R.; Teovent ; Sabidal ; ZYMA S.A.) and after intravenous infusion of aminophylline to eight healthy volunteers. Both drugs were administered in the morning (10 a.m.) and on a separate occasion in the evening (10 p.m.) after a 12 h period of fasting. After oral administration of a dose of 540 mg theophylline, the drug was steadily absorbed, both during day-time and during night-time. In some subjects absorption was slower in the evening. Maximum theophylline plasma concentrations were reached after 3.3 +/- 0.4 h (mean +/- SD) and 3.9 +/- 1.4 h respectively (not significantly different p greater than 0.05). The maximum plasma concentrations were almost identical after administration in the morning and in the evening (12.6 +/- 3.3 mg X l-1 and 13.1 +/- 1.4 mg X l-1 respectively). There was also no significant difference (p greater than 0.05) between the areas under the plasma concentration-time curves after oral and intravenous administration, both at day-time and at night-time. This finding indicates complete bioavailability of the sustained release tablets on both occasions. After administration of the tablets in the morning the plasma concentration 12 h post dosing was significantly lower than after administration in the evening: c1 12 accounted for 6.0 +/- 2.0 mg X l-1 after intake at 10 a.m. and for 7.9 +/- 2.1 mg X l-1 after ingestion at 10 p.m. (p less than 0.01). A similar observation was done after intravenous administration of the drug: c12 was 6.6 +/- 1.6 mg X l-1 after starting the infusion in the morning and 8.0 +/- 1.8 mg X l-1 after infusing the drug in the evening (p less than 0.01). This phenomenon could be explained by the finding of a significantly prolonged half-life of theophylline during night-time, provided that the plasma concentrations were in the range of 5 to 15 mg X l-1 (which coincides approximately with the therapeutic range of the drug).(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Eur J Clin Pharmacoljournal_title
European journal of clinical pharmacologyauthors
Jonkman JH,van der Boon WJ,Balant LP,Schoenmaker R,Holtkamp Adoi
10.1007/BF00630288subject
Has Abstractpub_date
1984-01-01 00:00:00pages
215-22issue
2eissn
0031-6970issn
1432-1041journal_volume
26pub_type
杂志文章abstract:PURPOSE:The incidence of osteoporosis-related fractures will increase substantially over the coming decades as the population ages globally. This has important economic and public health implications, contributing substantially to morbidity and excess mortality in this population. METHODS:When prescribing for older pa...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章,评审
doi:10.1007/s00228-011-0999-2
更新日期:2011-04-01 00:00:00
abstract:OBJECTIVE:To investigate the influence of concomitant administration of roxithromycin on the plasma pharmacokinetics of lovastatin. METHODS:In an open, randomized, crossover study, 12 healthy volunteers received 80 mg lovastatin orally either alone or concomitantly with 300 mg roxithromycin after 5-day pretreatment wi...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/s00228-001-0385-6
更新日期:2002-01-01 00:00:00
abstract::Previous studies showed that probucol significantly lowered both LDL cholesterol and HDL cholesterol. In addition, there is evidence that as an essential antioxidant probucol causes variations in cellular interactions and cardiovascular functions in patients. Therefore, 14 hypercholesterolemic men were investigated be...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:
更新日期:1991-01-01 00:00:00
abstract::An analytical procedure for the simultaneous determination of pethidine and its N-Demethylated metabolite, norpethidine, in plasma is described. Pethidine and norpethidine are separated by partition chromatography, converted to the trichloroethyl carbamate with trichloroethyl chloroformate and determined by electron c...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00561790
更新日期:1977-01-01 00:00:00
abstract::Factors influencing the disposition of clotiazepam in man were evaluated in a series of pharmacokinetic studies in healthy volunteers given a single 5 mg dose. Old age caused an increased volume of distribution of clotiazepam in women, and its clearance tended to be reduced in elderly men. Use of oral contraceptives, ...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00546709
更新日期:1984-01-01 00:00:00
abstract:OBJECTIVE:To examine the association between the sparteine/debrisoquine (CYP2D6) oxidation polymorphism and the risk of lung cancer. METHOD:Meta-analysis of case-control studies using a random effects model. The "Main outcome measure" was the odds ratio for the risk of lung cancer, using extensive metabolisers as the ...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章,meta分析
doi:10.1007/s002280050219
更新日期:1997-01-01 00:00:00
abstract::Lorcainide is a promising antiarrhythmic agent that belongs to the class of local anesthetics. It was tested in 7 patients with malignant ventricular arrhythmias that were resistant to other antiarrhythmic agents. Lorcainide was effective in all cases (complete disappearance of arrhythmias in 6 cases and more than 50%...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章
doi:10.1007/BF00607440
更新日期:1978-11-16 00:00:00
abstract:OBJECTIVE:To describe the quantitative and qualitative changes in the utilization of oral antihyperglycemic drugs (OAHDs) between 1998 and 2004 and to analyze patients' adherence to OAHD therapy. METHODS:We conducted a retrospective analysis of the electronic database of the Hungarian National Health Fund Administrati...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/s00228-005-0031-9
更新日期:2005-12-01 00:00:00
abstract::Guidelines presented previously for the analysis of plasma concentration versus time data for a drug exhibiting concentration-dependent plasma protein binding were successfully applied to the distributional parameters of a new cephalosporin, ceftriaxone. This approach provided several striking observations when the ph...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF01037956
更新日期:1983-01-01 00:00:00
abstract:BACKGROUND:Drug reaction with eosinophilia and systemic symptoms syndrome (DRESS) is a delayed infrequent potentially life-threatening idiosyncratic drug reaction. Aromatic anticonvulsants and allopurinol are the most frequent causative agents. However, various reports of antibiotic-induced DRESS are available. In this...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章,评审
doi:10.1007/s00228-020-03005-9
更新日期:2020-10-06 00:00:00
abstract::The bioavailability of four preparations containing dihydrotachysterol (DHT2) was tested in two separate trials with administration of single, oral doses of 1 mg per individual. The relative bioavailability of corresponding preparations (capsules vs capsules and oral solution vs oral solution) was tested in a randomis...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/BF00193484
更新日期:1994-01-01 00:00:00
abstract::The use of bioelectrical impedance (BI) analysis as a non-invasive approach for individualizing gentamicin therapy in newborn infants has been investigated in a two phase study. In Phase I, 1/impedance and length were identified as statistically significant predictors of the distribution volume of gentamicin (Adj R2 =...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00271367
更新日期:1993-01-01 00:00:00
abstract::Hemodynamic changes for 30 min after intravenous administration of molsidomin 4 mg were studied in 10 patients. Pulmonary artery pressure, pulmonary wedge pressure, right atrial pressure and aortic pressure decreased significantly after 15 min, and after 30 min they were still below the control level. Heart rate incre...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00716357
更新日期:1978-06-19 00:00:00
abstract::In 10 healthy male subjects the pharmacokinetics and haemodynamic effects of sustained-release isosorbide-5-mononitrate 60 mg (IS-5-MN) were studied after oral administration at two different times in the day (08.00 h and 20.00 h). Effects on blood pressure and heart rate after 3 min standing upright were measured in ...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00315142
更新日期:1991-01-01 00:00:00
abstract:PURPOSE:In-hospital statin dosage-related effect remains unknown for patients with arteriosclerotic cardiovascular disease (ASCVD). This study aimed to determine the associations of different in-hospital intensive statins dosages with the prognosis for patients in the era of percutaneous coronary intervention (PCI). M...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/s00228-020-02966-1
更新日期:2020-12-01 00:00:00
abstract:OBJECTIVE:Carvedilol, a beta-adrenoceptor blocking agent with additional alpha(1)-adrenoceptor blocking properties, has been shown to improve left ventricular function in chronic heart failure (CHF). However, its effect on mortality has recently been the subject of controversial discussion. The aim of this meta-analysi...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章,meta分析
doi:10.1007/s002280050460
更新日期:1998-06-01 00:00:00
abstract:PURPOSE:Until recently, ondansetron was approved for the prevention of nausea and vomiting only in patients older than 2 years. However, as the use of ondansetron in patients younger than 2 years had been documented, characterization of ondansetron pharmacokinetics in this younger pediatric age group was warranted. ME...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章,多中心研究
doi:10.1007/s00228-009-0730-8
更新日期:2010-01-01 00:00:00
abstract::In a double-blind controlled trial 22 patients with mild or moderate essential hypertension were treated with nicardipine 30 mg t.d.s. and 19 patients with propranolol 80 mg t.d.s. as monotherapy for 24 weeks. Blood pressure in both groups at the end of trial was equally and significantly reduced; systolic pressure 22...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/BF00544554
更新日期:1987-01-01 00:00:00
abstract:OBJECTIVE:High-density lipoprotein (HDL)-associated antioxidant paraoxonase (PON) may reduce low-density lipoprotein (LDL) oxidation and prevent atherosclerosis. The aim of this present study was to investigate the effect of the 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitor atorvastatin on hydroge...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章
doi:10.1007/s00228-004-0820-6
更新日期:2004-12-01 00:00:00
abstract::The effect of treatment with diflunisal on the steady-state pharmacokinetics of indomethacin has been studied in 16 healthy volunteers. The steady-state plasma concentration and AUC of indomethacin were significantly increased two- to threefold during treatment with diflunisal and its total clearance and total volume ...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00558077
更新日期:1989-01-01 00:00:00
abstract:OBJECTIVES:To compare 6-mercaptopurine (6-MP) and 6-thioguanine (6-TG) as substrates for the methylation reaction catalysed by the enzyme thiopurine S-methyltransferase (TPMT). METHODS:TPMT activity in haemolysed red blood cells of healthy blood donors was determined twice, using the same experimental setting and equa...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/s002280000137
更新日期:2000-07-01 00:00:00
abstract:OBJECTIVES:Evidence exists to suggest that diclofenac is metabolised by CYP2C9. The present study was undertaken in order to evaluate the effect of the single CYP2C9*3 variant on drug metabolism using diclofenac as a probe drug. METHODS:A single dose of diclofenac was administered orally to 12 healthy subjects in whom...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/s002280050722
更新日期:2000-04-01 00:00:00
abstract:PURPOSE:Tolvaptan is a selective vasopressin V2 receptor antagonist that can be given orally once daily for treatment of clinically significant hypervolemic and euvolemic hyponatremia (US and Europe) or extracellular volume expansion despite taking other diuretics (Japan). In vitro studies indicated that tolvaptan was ...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/s00228-011-1106-4
更新日期:2012-02-01 00:00:00
abstract:PURPOSE:Studies demonstrating mortality benefit of beta blockers (BB) after myocardial infarction (MI) were conducted before the era of percutaneous intervention and widespread use of statins. Recent retrospective studies show inconsistent results regarding which subgroups of coronary artery disease (CAD) patients' ben...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/s00228-020-02886-0
更新日期:2020-08-01 00:00:00
abstract::Total beta-adrenoceptor density and beta 1- and beta 2-subtype distribution in right and left atria and in different ventricular regions from 14 failing and seven nonfailing human hearts have been compared. End-stage heart failure was due to idiopathic dilated cardiomyopathy (n = 8) or ischaemic cardiomyopathy (n = 6)...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00265923
更新日期:1992-01-01 00:00:00
abstract:PURPOSE:To correct overdosing of drugs requiring adjustment based on renal function in intensive-care patients. METHODS:In a prospective intervention study, we estimated individual glomerular filtration rate and assessed whether medication required dose adjustment based on renal function. Senior clinicians received a ...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/s00228-009-0643-6
更新日期:2009-08-01 00:00:00
abstract:OBJECTIVES:A temporal relationship between the increasing use of antibiotics and the increasing levels of antibiotic resistance has been established for Streptococcus pneumoniae. There are also data that support the presence of a geographic correlation between the level of resistance and the pattern of use among differ...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/s00228-003-0724-x
更新日期:2004-04-01 00:00:00
abstract:PURPOSE:Network meta-analysis (NMA) is a new technique that allows multiple treatment comparisons and provides estimates of effect sizes for all possible pair-wise comparisons. Several NMAs of antiepileptic drug (AED) efficacy and tolerability in individuals with refractory focal epilepsy, however, came to non-specific...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章,meta分析
doi:10.1007/s00228-014-1669-y
更新日期:2014-06-01 00:00:00
abstract:OBJECTIVES:To compare plasma levodopa concentrations after repeated doses of levodopa/carbidopa/entacapone (LCE) and levodopa/carbidopa (LC). METHODS:Open-label, randomized, two-period, active-controlled, cross-over study with four dosing regimens: groups I and II (healthy volunteers and Parkinson's disease patients) ...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章,随机对照试验
doi:10.1007/s00228-009-0622-y
更新日期:2009-05-01 00:00:00
abstract:PURPOSE:We investigated the role of genetic, physiological, environmental, and epigenetic factors in regulating CYP2A6 expression and nicotine metabolism. METHODS:Human livers (n = 67) were genotyped for CYP2A6 alleles and assessed for nicotine metabolism and CYP2A6 expression (mRNA and protein). In addition, a subset...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/s00228-009-0762-0
更新日期:2010-03-01 00:00:00