Abstract：
:The effect of nevirapine once-daily dosing on the pharmacokinetics of methadone and its main metabolite, 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine, was evaluated in ten HIV positive patients on stable methadone therapy. Nevirapine 200 mg once daily was administered orally from day 1 to day 14. On day 15, nevirapine dose was increased to 400 mg once daily for the following 7 days of study and thereafter. On days 0, 8, and 22, concentration-time profiles of methadone and its metabolite were collected after methadone intake. Noncompartmental pharmacokinetic analysis was performed. Pharmacokinetic parameters obtained on days 8 and 22 were compared with those obtained before nevirapine administration. After starting nevirapine treatment, nine out of ten patients experienced symptoms of abstinence syndrome, and methadone dose had to be increased by 20% on average during the course of the study. After 7 days with nevirapine 200 mg, methadone area under the plasma concentration time curve (AUC) and maximum concentration (C(max)) values were reduced by 63.3% and 55.2%, respectively. Switching to high dose nevirapine (400 mg once daily) did not result in a greater decrease in the methadone AUC and C(max) compared with 200 mg nevirapine. None of the noncompartmental pharmacokinetic parameters of methadone metabolite evidenced statistically significant differences across the three study periods. The decrease in methadone AUC and C(max) administrated once daily was similar to that seen in other studies with nevirapine administrated twice daily, suggesting that the degree of induction of methadone metabolism by nevirapine is similar for both dosing regimens.
journal_name
Eur J Clin Pharmacoljournal_title
European journal of clinical pharmacologyauthors
Arroyo E,Valenzuela B,Portilla J,Climent-Grana E,Pérez-Ruixo JJ,Merino Edoi
10.1007/s00228-007-0299-zsubject
Has Abstractpub_date
2007-07-01 00:00:00pages
669-75issue
7eissn
0031-6970issn
1432-1041journal_volume
63pub_type
杂志文章abstract：OBJECTIVE:The aim of the present study was to develop a real-time reverse-transcription polymerase chain reaction (RT-PCR) methodology for the quantification of thiopurine methyltransferase (TPMT) gene expression in whole blood and compare it with the TPMT enzyme activity measured in red blood cells. METHODS:TPMT gene...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-003-0617-z
更新日期：2003-07-01 00:00:00
abstract：:The disposition of paracetamol following an oral dose of 1.0 g was compared in 10 healthy volunteers, 7 patients with moderate chronic renal failure and 6 patients with end stage renal failure on maintenance haemodialysis. Paracetamol absorption was normal in the patients with renal failure. The mean plasma half-life ...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF00558162
更新日期：1989-01-01 00:00:00
abstract：:In a cross-over pharmacokinetic study in 8 healthy volunteers a retard formulation containing pindolol 30 mg was compared with the normal 15 mg. pindolol tablet. The pindolol 30 mg retard tablet led to the same maximum plasma level as a single dose of the normal pindolol tablet. A plasma concentration higher than half...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF00542037
更新日期：1982-01-01 00:00:00
abstract：PURPOSE:Time of drug administration may significantly influence its effect. The aim of the present study was to investigate the effect of ASA (administrated in the morning or in the evening) on the anti-hypertensive effect and diurnal blood pressure profile in the high-risk group of cardiovascular patients. METHODS:Al...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-020-02997-8
更新日期：2021-01-01 00:00:00
abstract：OBJECTIVE:To determine the prevalence of inappropriate medication use among hospitalized older adults and to identify predictors of this use. METHODS:A total of 5734 patients (mean age 79 years) admitted to geriatric and internal medicine wards participating in the study in 1995 and 1997 were included in this analysis...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-003-0600-8
更新日期：2003-06-01 00:00:00
abstract：OBJECTIVE:To investigate the effect of grapefruit juice (GJ) on the pharmacokinetics of orally administered verapamil in hypertensive patients. METHODS:Ten hypertensive patients on chronic verapamil treatment participated in a two-day study. On day 1 200 ml of water was given 1 hour before, and together with the morni...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章
doi：10.1007/s002280050470
更新日期：1998-06-01 00:00:00
abstract：:Maternal and umbilical serum concentrations of atenolol, a hydrophilic, cardioselective beta-adrenoceptor antagonist, were studied at delivery in seven cases of pregnancy hypertension. The drug had been administered to each patient for at least one week. Atenolol was detected in both maternal and umbilical serum in si...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF00607437
更新日期：1978-11-16 00:00:00
abstract：AIMS:To determine whether the variability in cytochrome P(450) (CYP)3A4 metabolic function is exhibited at both transcription and translation levels and to examine the population distribution of CYP3A4 enzyme kinetics, protein, and mRNA. METHODS:Enzyme kinetics of testosterone 6beta-hydroxylation, immunoblot CYP3A4 pr...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-002-0487-9
更新日期：2002-08-01 00:00:00
abstract：:Glucocorticoids (GCs) exert different activities that are useful for the treatment of several haematologic disorders. The synergistic effect with cytotoxic drugs is important for the therapy of lymphoproliferative diseases. The inhibition of macrophages prevents acute haemolysis and platelets destruction in autoimmune...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF01844200
更新日期：1993-01-01 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：:The present study was designed to investigate the effects of raised intragastric pH on the absorption of theophylline from a sustained-release formulation. Six healthy male volunteers participated in the cross-over randomised study and on one of two occasions were pretreated with 240 mg omeprazole, administered in thr...
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/BF01740660
更新日期：1992-01-01 00:00:00
abstract：:Serotonin (5-HT) stimulates prolactin release. In the present study the ability of dexfenfluramine to increase serum prolactin was used as an index of central 5-HT function after acute and chronic pretreatment of volunteers with fluoxetine. Following a single-blind, random design, on each experimental day each volunte...
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/BF00191908
更新日期：1994-01-01 00:00:00
abstract：AIM:Our aim was to characterize utilization patterns for drugs used to treat attention deficit/hyperactivity disorder (ADHD) on the level of the individual patient among Danish users, focusing on treatment duration, doses used, and concurrent use of ADHD and non-ADHD drugs. METHODS:Using the Danish Registry of Medicin...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-012-1344-0
更新日期：2013-03-01 00:00:00
abstract：PURPOSE:Drug-induced immune thrombocytopaenia is a rare, serious condition that can be triggered by numerous medications. To characterize the spectrum of drugs associated with immune thrombocytopaenia (ITP) in the Berlin Case-Control Surveillance Study (FAKOS). METHODS:Adult hospitalized patients with new onset idiopa...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章,多中心研究
doi：10.1007/s00228-011-1184-3
更新日期：2012-05-01 00:00:00
abstract：PURPOSE:To determine whether two of the major operational stressors associated with military missions in Afghanistan: dry heat and long durations of soldier patrol (SP), alter the pharmacokinetics of ibuprofen. METHODS:Thirteen healthy and physically fit participants (19-32 years) were randomized to a four-arm crossov...
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/s00228-012-1307-5
更新日期：2013-01-01 00:00:00
abstract：PURPOSE:Olaparib is a poly (ADP-ribose) polymerase (PARP) inhibitor indicated for ovarian and metastatic breast cancer. Increased serum creatinine levels have been observed in patients taking olaparib, but the underlying mechanism is unknown. This study aimed to investigate if patients receiving olaparib have increased...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-020-03070-0
更新日期：2021-02-01 00:00:00
abstract：:The effect of a single dose of carbamazepine (CBZ), 10 mg kg-1, on a battery of simple psychomotor tests was investigated in 12 healthy subjects (6 male, 6 female) in a balanced randomised double blind placebo controlled cross-over study. Psychomotor testing and blood sampling for total and free plasma CBZ, and CBZ 10...
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/BF00614193
更新日期：1986-01-01 00:00:00
abstract：OBJECTIVE:In a double blind, randomised, placebo-controlled, cross-over study 12 healthy male volunteers were allocated to receive felodipine + placebo, cyclosporine + placebo, and felodipine + cyclosporine in order to investigate the interaction between the calcium channel blocker felodipine and cyclosporine as it aff...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章
doi：10.1007/s002280050093
更新日期：1996-01-01 00:00:00
abstract：OBJECTIVES:Caffeine-containing beverages are generally consumed by Nigerians suffering from malaria and kwashiorkor in the belief that caffeine aids early recovery from these illnesses, which are common in the tropics. However, there are no studies on the influence of these diseases on the absorption and pharmacokineti...
journal_title：European journal of clinical pharmacology
pub_type： 临床试验,杂志文章
doi：10.1007/s002280050734
更新日期：2000-05-01 00:00:00
abstract：OBJECTIVE:To study the effects of possible interactions between levosimendan and warfarin on pharmacokinetics and pharmacodynamics. Furthermore, the effects of levosimendan on blood coagulation were investigated. METHODS:Open, randomised cross-over design with two treatment phases was used. During one phase, levosimen...
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/s002280000204
更新日期：2000-12-01 00:00:00
abstract：OBJECTIVE:This paper describes a method to determine the number of patients and the number of blood levels which are appropriate for a pharmacokinetic population analysis. METHODS:We studied this question by performing 203 runs of population analysis, using the NPEM algorithm with a one compartment model, starting wit...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s002280050199
更新日期：1996-01-01 00:00:00
abstract：:Jejunal perfusion was performed in 12 healthy volunteers to evaluate the dose dependent effects of loperamide on intestinal absorption, stimulated secretion and transit. In 6 volunteers intestinal perfusion of the jejunal segment with isotonic NaCl solution was followed by addition of loperamide in increasing doses (2...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF00315436
更新日期：1991-01-01 00:00:00
abstract：BACKGROUND:Pharmacovigilance, defined by the World Health Organisation as 'the science and activities relating to the detection, assessment, understanding and prevention of adverse effects or any other drug-related problem' plays a key role in ensuring that patients receive safe drugs. Our knowledge of a drug's adverse...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章,评审
doi：10.1007/s00228-008-0475-9
更新日期：2008-08-01 00:00:00
abstract：:The binding equilibria of warfarin and phenprocoumon with defatted human serum albumin were studied by equilibrium dialysis in 33 mM sodium phosphate buffer, pH 7.4, 37 degrees C. The binding isotherms for both ligands were consistent with binding to two similar and independent sites in the albumin molecule. The bindi...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF00315474
更新日期：1993-01-01 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：PURPOSE:To investigate associations between antidepressant use patterns and risk of fatal and non-fatal suicidal behaviours in older adults who initiated antidepressant therapy. METHOD:A national population-based cohort study conducted among Swedish residents aged ≥ 75 years who initiated antidepressant treatment. Pat...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/s00228-017-2360-x
更新日期：2018-02-01 00:00:00
abstract：PURPOSE:This study aimed to test the applicability and effectiveness of the principles and informed consent form (ICF) template proposed by the Strategic Initiative for Developing Capacity in Ethical Review (SIDCER) across multiple clinical trials involving Thai research participants with various conditions. METHODS:A...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章,随机对照试验
doi：10.1007/s00228-016-2159-1
更新日期：2017-02-01 00:00:00
abstract：:Methylergometrine, the main metabolite of methysergide, has 40-times greater 5 HT antagonistic potency than methysergide in isolated segments of human temporal artery. It is suggested that methylergometrine is the "active" drug when methysergide is used in migraine prophylaxis, and that the two compounds should be com...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF00610384
更新日期：1987-01-01 00:00:00
abstract：:The maternofetal transfer of the beta 1-selective adrenergic antagonist celiprolol has been studied in four hypertensive pregnant women. Fetal plasma concentrations were about 25-50% of the levels found on the maternal side. There was no significant difference between the plasma concentrations of the two enantiomers i...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF00316477
更新日期：1993-01-01 00:00:00
abstract：:The kinetics and dynamics of single doses (5 mg p.o.) of the optical isomers of acenocoumarol (R-AC and S-AC) were followed in healthy subjects and the effect on them of cimetidine 800 mg/day was also investigated. The AC enantiomers differed greatly in their pharmacokinetics. The mean residence time (MRT) of R-AC was...
journal_title：European journal of clinical pharmacology
pub_type： 杂志文章
doi：10.1007/BF00542424
更新日期：1986-01-01 00:00:00
