Abstract:
OBJECTIVE:Contraception is recommended for female patients during ursodeoxycholic acid (UDCA) treatment for the potential teratogenic effect of this bile acid, and the aim of our study was to determine whether this treatment affects the bioavailability of ethinylestradiol (EE2). METHODS:In this double-blind, randomised study, we measured EE2 pharmacokinetics in eight healthy volunteers randomly allocated to receive oral contraceptive (30 microg EE2 and 75 microg gestodene) plus either UDCA (8-10 mg/kg per day) or placebo for 21 days during the first of three consecutive menstrual cycles. After a washout period during the second cycle, the subjects received the alternative treatment during the third menstrual cycle. Serum EE2 and UDCA were measured using radioimmunoassay and gas chromatography-mass spectrometry, respectively. RESULTS:The profile for serum EE2 concentration was similar during UDCA (mean maximum serum concentration 177 pg/ml, SEM 59) and during placebo treatment (153 pg/ml, SEM 62), and mean area under the curve (AUC) was 1374 pg/h per ml (SEM 580) and 1320 pg/h per ml (SEM 551) during the two regimens, respectively. The point estimates and 90% confidence intervals of UDCA/placebo ratios for EE2 AUC and for maximum serum concentration were 1.1 (0.8-1.5) and 1.2 (1.0-1.4), respectively. Mean serum triglycerides concentration increased from 58.3 mg/dl (SEM 6.8) at enrolment to 91.4 mg/dl (SEM 10.7) during placebo (P < 0.01) and to 88.6 mg/dl (SEM 13.7) during UDCA treatment (P < 0.05). During UDCA treatment, serum enrichment with this bile acid and with the metabolite iso-UDCA was 29% (16%) and 3% (2%), respectively. CONCLUSION:Co-administration with UDCA does not affect the bioavailability of EE2 in healthy volunteers, indicating that contraceptive efficacy is not affected.
journal_name
Eur J Clin Pharmacoljournal_title
European journal of clinical pharmacologyauthors
Baisini O,Benini F,Petraglia F,Kuhnz W,Scalia S,Marschall HU,Brunetti G,Tauschel HD,Lanzini Adoi
10.1007/s00228-004-0796-2subject
Has Abstractpub_date
2004-09-01 00:00:00pages
481-7issue
7eissn
0031-6970issn
1432-1041journal_volume
60pub_type
临床试验,杂志文章,随机对照试验abstract::The pharmacokinetics of fluocortolone and its effect on the circadian rhythm of plasma cortisol and ACTH have been studied during different schedules of oral administration. Groups of 6 healthy male adults were given a single daily dose of fluocortolone 5, 10 and 20 mg, and another group received 20 mg every second da...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00609249
更新日期:1988-01-01 00:00:00
abstract::The pharmacokinetics of intravenous enprofylline has been studied in 8 children with asthma. The mean plasma half-life of enprofylline (1.0 h) was considerably shorter than that previously reported in adults. The half-life determined from log urine excretion rate data was identical to the plasma half-life, so urine ex...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00637683
更新日期:1987-01-01 00:00:00
abstract::A phamacokinetic study in man has been made of a new dosage form of diclofenac hydroxyethylpyrrolidine (DIEP); soluble salt packed in sachets was compared with diclofenac sodium as enteric coated tablets. Oral DIEP 2 X 50 mg showed a significant difference in absorption kinetics (ka, lag time and tmax) as compared to ...
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/BF00265987
更新日期:1990-01-01 00:00:00
abstract::Changes in venous haemodynamics were studied after administration of a single dose of 3 g Heptaminol Adenosine Phosphate (HAP) to 30 subjects with primary varicose veins. Strain gauge plethysmography was used to observe changes in venous volume and in maximal venous outflow, 1, 2, 3 and 4 h after dosing. A significant...
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/BF00609421
更新日期:1989-01-01 00:00:00
abstract:PURPOSE:The aim of our study was to evaluate the impact of CYP3A4, CYP3A5, and ABCB1 polymorphisms on donepezil disposition and clinical outcome. METHODS:Fifty-four Italian patients diagnosed with probable mild to moderate Alzheimer's disease, treated with donepezil (37 patients 5 mg/day, 17 patients 10 mg/day) were g...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/s00228-010-0883-5
更新日期:2011-01-01 00:00:00
abstract:OBJECTIVE:To examine the effect of fluconazole, a potent inhibitor of CYP2C9 and CYP2C19, on the pharmacokinetics of rosuvastatin in healthy volunteers. Significantly increased plasma concentrations of fluvastatin have been observed following co-administration with fluconazole. METHODS:This was a randomised, double-bl...
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/s00228-002-0508-8
更新日期:2002-11-01 00:00:00
abstract::The plasma levels and myocardial content of verapamil and its metabolites norverapamil, N-dealkylverapamil and N-dealkylnorverapamil were determined in 15 patients with valvular [3] or ischaemic [12] heart disease. The mean myocardial plasma concentration ratio (M/P) was 7.05 for verapamil, 11.45 for norverapamil, 8.9...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00607910
更新日期:1985-01-01 00:00:00
abstract:PURPOSE:The use of surgical antibiotic prophylaxis (SAP) in children is poorly characterized. Our aim was to evaluate the effectiveness of a quality improvement (QI) intervention targeting SAP in children, by means of a multicenter prospective intervention study, with a before and after design. METHODS:We prospectivel...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1007/s00228-017-2270-y
更新日期:2017-09-01 00:00:00
abstract:PURPOSE:The aim of this study was to examine whether educational meetings and group detailing could increase the use of drugs from the ward lists or the drug formulary in hospitals. METHODS:Twelve medical wards from two hospitals were randomized into three groups: control, basic and extended intervention. All wards ha...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章,随机对照试验
doi:10.1007/s00228-013-1589-2
更新日期:2014-01-01 00:00:00
abstract::The blood level versus time curve for unchanged cimetidine after a 200 mg oral dose has been determined in 20 apparently healthy subjects, ranging from 22 to 84 years of age. A significant relationship between the area under the curve (AUC) and age was found (r = 0.81; P less than 0.001). The peak concentrations of ci...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00618514
更新日期:1979-05-21 00:00:00
abstract::Nicotine chewing gum (Nicorette 4 mg) and an identical placebo gum were administered on different days, in a double-blind cross over fashion, to 4 men, aged 25-52 years, and 4 women, aged 21-49 years, all healthy non-smokers. The subjects chewed the gum for 30 min and heart rate, blood pressure, electrocardiogram, fin...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章
doi:10.1007/BF00613610
更新日期:1982-10-01 00:00:00
abstract:INTRODUCTION:The aim of therapeutic regimens using proton pump inhibitors (PPIs) in patients with acid-related diseases is to potently inhibit acid secretion for the full 24 h. However, optimum treatment is still unclear because the pharmacodynamics of PPIs differ among CYP2C19 genotypes and most of the previous studie...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章
doi:10.1007/s00228-014-1713-y
更新日期:2014-09-01 00:00:00
abstract::The effects of acute introduction and withdrawal of trimeprazine (Vallergan), an antihistaminic phenothiazine derivative with known sedative effects, were investigated by a single blind polygraphic study in 8 healthy volunteers. A baseline placebo was given on Nights 1-3, followed either by 10 mg or 20 mg of the drug ...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章
doi:10.1007/BF00606405
更新日期:1977-03-11 00:00:00
abstract:PURPOSES:Tacrolimus (TAC) is the most widely used immunosuppressant for the prevention of acute rejection after solid organ transplantation. Its pharmacokinetics (PK) show considerable variability, making TAC a good candidate for therapeutic drug monitoring (TDM). The principal aim of the study was to describe the PK o...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/s00228-013-1501-0
更新日期:2013-08-01 00:00:00
abstract:OBJECTIVE/METHODS:The metabolism of chloramphenicol succinate (CAPS) by human bone marrow was studied in vitro using 75 marrow samples. Whole marrow samples were incubated with CAPS with or without reduced nicotinamide adenine dinucleotide phosphate for 1, 2 and 3 h at 37 degrees C. Ficoll-paque-separated marrow mononu...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/s002280000143
更新日期:2000-08-01 00:00:00
abstract::The pharmacokinetics of a single dose of netilmicin (NM) was studied in 6 healthy volunteers. Elimination of the drug was followed in serum and urine for 24 h and 72 h, respectively. NM concentrations were measured with a modified radioenzymatic assay. A three compartment open model was employed to calculate the pharm...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00605631
更新日期:1979-11-01 00:00:00
abstract::The confidence interval approach to bioavailability assessment depends first on selection of the confidence level, usually 95%, and then determination of the confidence limits for the expected bioavailability ratio AUC(Test)/AUC(Reference). In practice, however, it is sometimes of greater interest to know the probabil...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00635713
更新日期:1985-01-01 00:00:00
abstract:OBJECTIVE:Although the treatment of schizophrenia with many second generation antipsychotics is known to be associated with metabolic changes, such as hyperglycemia or hypercholesterolemia, the underlying mechanisms of these adverse reactions remain unclear. In light of the recent focus on the involvement of semicarbaz...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章
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abstract:BACKGROUND:Sequential and concomitant therapies are two innovative therapies for Helicobacter pylori (H. pylori) eradication. However, the comparative efficacy and safety of these treatments are controversial. Therefore, we aimed to conduct an updated systematic review and meta-analysis of studies that compared these t...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章,meta分析,评审
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journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00644966
更新日期:1979-08-01 00:00:00
abstract::The haemodynamic effects of prenalterol, a new beta-1 agonist, were studied in 10 patients with chronic heart failure. Following intravenous prenalterol infusions of 1 mg, 2.5 mg and 5 mg at 15 min intervals, oral slow release prenalterol 20 mg, 30 mg and 50 mg was given at 2 h intervals and then 50-100 mg bid for one...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF00542125
更新日期:1983-01-01 00:00:00
abstract::In a double blind, randomised trial, the effects of 1 g aspirin and 1 g paracetamol were compared on bleeding time and platelet aggregation in 40 volunteers (20 females). Also investigated was the relationship between plasma aspirin esterase activity and both bleeding time and platelet aggregation after aspirin. Follo...
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/BF00543486
更新日期:1984-01-01 00:00:00
abstract::Interaction of the main metabolites of diazepam and chlordiazepoxide with alcohol was measured in two subacute double-blind cross-over experiments on 40 healthy, young volunteers. The drugs were administered for two week periods. The variables measured were choice reaction time and accuracy, eye-hand co-ordination, di...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章
doi:10.1007/BF00644607
更新日期:1978-07-30 00:00:00
abstract::Tolbutamide (1 g/70 kg) was administered as a single intravenous dose to 31 healthy, non-smoking, drug-free males between 23 and 87 years old and the total amounts of hydroxy and carboxytolbutamide excreted in 24 h were measured. There was a significant decrease in the urinary recovery of both metabolites with age. Th...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/BF02336696
更新日期:1990-01-01 00:00:00
abstract::The influence of a diet deficient in energy or protein on hepatic oxidation (Phase I reactions) and glucuronidation (Phase II reactions) in man has been examined. Nine healthy volunteers were fed an energy deficient diet (daily energy intake 4.3 MJ; daily protein intake 0.94 g/kg) and a protein deficient diet (daily e...
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/BF00278583
更新日期:1990-01-01 00:00:00
abstract:OBJECTIVE:To investigate if an intervention aimed at improving the quality of the diagnostic procedures in Spanish general practice could lower antibiotic prescribing in patients with respiratory tract infections (RTIs). METHODS:GPs in the intervention group (n=17) registered all patients with RTIs during a 3-week per...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/s00228-006-0187-y
更新日期:2006-11-01 00:00:00
abstract::In an open, randomised, cross-over study we investigated the effect of a single 200 mg oral dose of entacapone, a novel catechol-O-methyltransferase (COMT) inhibitor, on the pharmacokinetics and metabolism of levodopa/carbidopa, and on the cardiovascular responses (blood pressure and pulse rate variation to standard s...
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/BF00315512
更新日期:1993-01-01 00:00:00
abstract::We report the first placebo controlled parallel group study of once daily endralazine (5-20 mg) in hypertension uncontrolled by a beta-blocker plus a diuretic. Following a 4-week run-in period 22 patients with a sitting mean arterial pressure (MAP) greater than 110 mm Hg were entered into the study and received either...
journal_title:European journal of clinical pharmacology
pub_type: 临床试验,杂志文章
doi:10.1007/BF00613452
更新日期:1985-01-01 00:00:00
abstract:PURPOSE:Serotonin receptor 1B (HTR1B) is involved in the regulation of the serotonin system, playing different roles in specific areas of the brain. We review the characteristics of the gene coding for HTR1B, its product and the functional role of HTR1B in the neural networks involved in motivation and memory; the cent...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章,评审
doi:10.1007/s00228-009-0724-6
更新日期:2010-01-01 00:00:00
abstract:OBJECTIVE:To investigate the CYP1A2 phenotype distribution in a population with an increased exposure to polychlorinated biphenyls (PCBs) that would likely induce an increased activity of this enzyme. Further, to investigate the effect of sex, smoking, and oral contraceptive use on the CYP1A2 activity. METHODS:In 305 ...
journal_title:European journal of clinical pharmacology
pub_type: 杂志文章
doi:10.1007/s00228-006-0205-0
更新日期:2006-12-01 00:00:00