PubMed Journals Articles About "Therapeutic Drug Monitoring And Pharmacogenomics Study Of Methadone Therapy" RSS

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Showing "Therapeutic Drug Monitoring Pharmacogenomics Study Methadone Therapy" PubMed Articles 1–25 of 79,000+

Methadone maintenance treatment: A 15-year retrospective study in Split-Dalmatia County, Croatia.

The aim of this retrospective study is to use existing epidemiological data on patients in methadone maintenance treatment in Split Dalmatia County from 2001 to 2015 in order to evaluate the substitution treatment system and policy of opiate addicts treatment, the epidemiological trend, and risk of overdose mortality. In addition, we would like to highlight the problem of poor control of methadone therapy, and thus the possibility of selling methadone. The result is a greater number of deaths caused by meth...

Large-Scale Variability of Inpatient Tacrolimus Therapeutic Drug Monitoring at an Academic Transplant Center: a Retrospective Study.

Inpatient tacrolimus therapeutic drug monitoring (TDM) lacks standardized guidelines. In this study, the authors analyzed variability in the pre-analytical phase of the inpatient tacrolimus TDM process at their institution.

An Improved LC-ESI-MS/MS Method to Quantify Pregabalin in Human Plasma and Dry Plasma Spot for Therapeutic Monitoring and Pharmacokinetic Applications.

Therapeutic drug monitoring (TDM) of anti-epileptic drugs provides a valid clinical tool in optimization of overall therapy. However, TDM is challenging due to the high biological samples (plasma/blood) storage/shipment costs and the limited availability of laboratories providing TDM services. Sampling in the form of dry plasma spot (DPS) or dry blood spot (DBS) is a suitable alternative to overcome these issues.

No Pharmacokinetic Interactions Between Elbasvir or Grazoprevir and Methadone in Participants Receiving Maintenance Opioid Agonist Therapy.

We conducted two phase I trials to evaluate the pharmacokinetic interactions between elbasvir (EBR), grazoprevir (GZR), and methadone (MK-8742-P010 and MK-5172-P030) in non-hepatitis C virus (HCV)-infected participants on methadone maintenance therapy. Coadministration of EBR or GZR with methadone had no clinically meaningful effect on EBR, GZR, or methadone pharmacokinetics. The geometric mean ratios (GMRs) for R- and S-methadone AUC were 1.03 (90% confidence interval (CI), 0.92-1.15) and 1.09 (90% CI, 0.9...

An LC-MS/MS method for absolute quantification of nivolumab in human plasma: application to clinical therapeutic drug monitoring.

Nivolumab is a fully humanized IgG4 monoclonal antibody that targets the programmed death-1 (PD-1) receptor, disrupting PD-1-mediated signaling and restoring antitumor immunity. The objective of this study was to develop a nivolumab quantification method using liquid chromatography-tandem mass spectrometry (LC-MS/MS) and to evaluate its application in clinical therapeutic drug monitoring.

Enhancement and Suppression of Ionization in Drug Analysis Using HPLC-MS/MS in Support of Therapeutic Drug Monitoring: A Review of Current Knowledge of Its Minimization and Assessment: Erratum.

Drug-induced hyperglycaemia and diabetes: pharmacogenomics perspectives.

Drug-induced diabetes is widely reported in clinical conditions, and it is becoming a global issue because of its potential to increase the risk of severe cardiovascular complications. However, which drug mechanisms exert their diabetogenic effects and why the effects present significant inter-individual differences remain largely unknown. Pharmacogenomics, which is the study of how genomic variation influences drug responses, provides an explanation for individual differences in drug-induced diabetes. We h...

Potential of Oral Fluid as a Clinical Specimen for Compliance Monitoring of Psychopharmacotherapy.

Oral fluid (OF) is being developed as a specimen for the determination of drug intake as an alternative to serum and plasma. It is generally considered as an attractive specimen due to the noninvasive nature of the sampling procedure and the relation to the free fraction of drug in the blood. These features are of particular value in drug treatment of psychiatric disorders. To establish OF for the purpose of monitoring drug therapy, the relationship between concentrations in OF and serum/plasma must be docu...

Therapeutic Drug Monitoring of Busulfan for the Management of Pediatric Patients: Cross-Validation of Methods and Long-Term Performance: Erratum.

Ageing opioid users' increased risk of methadone-specific death in the UK.

The first evidence that the hazard ratio (HR) for methadone-specific death rises more steeply with age-group than for all drug-related deaths (DRDs) came from Scotland's cohort of 33,000 methadone-prescription clients. We aim to examine, for England, whether illicit opioid users' risk of methadone-specific death increases with age; and to pool age-related HRs for methadone-specific deaths with those for Scotland's methadone-prescription clients.

Methadone Metabolism And Drug-Drug Interactions: In Vitro And In Vivo Literature Review.

Methadone is utilized for the treatment of individuals with opiate dependence. Methadone undergoes N-demethylation by multiple cytochrome P450 (CYP) enzymes including CYP3A4, CYP2B6, CYP2C19, CYP2D6, CYP2C9 and CYP2C8. In vivo, polymorphism effects on methadone systemic exposure have been noted for CYP2B6, CYP3A4 and CYP2D6. Clinical drug interaction studies with antiviral drugs in methadone maintenance treatment patients yield varying results on methadone pharmacokinetics and pharmacodynamics. In general, ...

Therapeutic Drug Monitoring of endoxifen as an alternative for CYP2D6 genotyping in individualizing tamoxifen therapy.

Different strategies have been proposed to individualize tamoxifen treatment in order to improve recurrence-free survival in estrogen receptor (ER)-positive breast cancer. To date, the debate remains on which strategy should be used. The objective of this viewpoint is to highlight Therapeutic Drug Monitoring of endoxifen, the active tamoxifen metabolite, as the preferred methodology compared to CYP2D6 genotyping for individualizing tamoxifen therapy for ER-positive breast cancer patients treated in the adju...

Long-term monitoring of drug consumption patterns in a large-sized European city using wastewater-based epidemiology: Comparison of two sampling schemes for the assessment of multiannual trends.

A comprehensive study aimed at monitoring of temporal variability of illicit drugs (heroin, cocaine, amphetamine, MDMA, methamphetamine and cannabis) and therapeutic opiate methadone in a large-sized European city using wastewater-based epidemiology (WBE) was conducted in the city of Zagreb, Croatia, during an 8-year period (2009-2016). The study addressed the impact of different sampling schemes on the assessment of temporal drug consumption patterns, in particular multiannual consumption trends and docume...

Serum and Saliva Concentrations of Venlafaxine, O-Desmethylvenlafaxine, Quetiapine, and Citalopram in Psychiatric Patients.

Therapeutic drug monitoring has become increasingly important in psychiatric therapy. However, it is not yet implemented as a daily routine in clinical settings. To evaluate new, noninvasive procedures, we compared blood and saliva venlafaxine, quetiapine, and citalopram concentrations in samples collected from psychiatric patients.

A Clinically Relevant Effect of UGT1A4*3 on Lamotrigine Serum Concentration is Restricted to Postmenopausal Females - a Study Matching Therapeutic Drug Monitoring and Genotype Data from 534 Patients.

Previous studies have reported inconsistent findings regarding the impact of the UGT1A4*3 variant allele on lamotrigine (LTG) exposure. As no studies have controlled for non-genetic factors, the aim of this study was to compare serum concentrations of LTG in carriers vs. non-carriers of UGT1A4*3 adjusting for differences in age, sex and valproic acid (VPA) comedication.

Mass Spectrometry for Research and Application in Therapeutic Drug Monitoring or Clinical and Forensic Toxicology.

This paper reviews current applications of various hyphenated low- and high-resolution mass spectrometry techniques in the field of therapeutic drug monitoring and clinical/forensic toxicology in both research and practice. They cover gas chromatography, liquid chromatography, matrix-assisted laser desorption ionization, or paper spray ionization coupled to quadrupole, ion trap, time-of-flight, or Orbitrap mass analyzers.

Viral suppression among HIV-infected methadone-maintained patients: The role of ongoing injection drug use and adherence to antiretroviral therapy (ART).

Methadone maintenance therapy (MMT) is associated with improved virologic outcomes, yet no studies have explored factors associated with viral suppression in HIV-infected patients on MMT. Given the critical role of sustained viral suppression in maximizing benefits of antiretroviral therapy (ART), we sought to assess factors associated with viral suppression in patients stabilized on MMT.

Therapeutic drug monitoring to assess drug adherence in assumed resistant hypertension: a comparison with directly observed therapy in three non-adherent patients.

Resistant hypertension (RH) is a common health problem leading to suboptimal cardiovascular prevention. A large number of patients with RH have poor medication adherence explaining their assumed resistance to therapy. We combined directly observed therapy (DOT) with therapeutic drug monitoring (TDM) in three patients at several time points to enable an extensive feedback on blood pressure (BP) and drug levels. BP was measured with an automatic oscillatory device at regular intervals of 5 minutes (directly b...

Therapeutic Drug Monitoring of Antiepileptic Drugs in Epilepsy: A 2018 Update.

Antiepileptic drugs (AEDs) are the mainstay of epilepsy treatment. Since 1989, 18 new AEDs have been licensed for clinical use and there are now 27 licensed AEDs in total for the treatment of patients with epilepsy. Furthermore, several AEDs are also used for the management of other medical conditions, e.g., pain and bipolar disorder. This has led to an increasingly widespread application of therapeutic drug monitoring (TDM) of AEDs, making AEDs among the most common medications for which TDM is performed. ...

A Longitudinal Study of Tacrolimus in Lymphocytes during the First Year after Kidney Transplantation.

Tacrolimus (TAC) is an immunosuppressive drug used after organ transplantation. Dosing is adjusted using whole blood (TAC-WB) measurements. Patients within the therapeutic WB-TAC window still experience rejections and adverse effects. Alternative monitoring methods are therefore warranted. The authors developed a method for measuring TAC in peripheral blood mononuclear cells (PBMC)-isolates (PBMC-TAC) and performed a pharmacokinetic study in a cohort of kidney transplant patients during the first year after...

Therapeutic drug monitoring is more cost-effective than a clinically-based approach in the management of loss of response to infliximab in inflammatory bowel disease: an observational multi-centre study.

Empirical dose intensification and therapeutic drug monitoring (TDM) of infliximab (IFX) trough levels (ITL) and antibody (ATI) assays are recognised approaches for managing the loss of response (LoR) in inflammatory bowel disease (IBD) patients.

Factors associated with discontinuation of methadone maintenance therapy (MMT) among persons who use alcohol in Vancouver, Canada.

We sought to examine the factors associated with discontinuation of MMT among persons on methadone who use alcohol.

Therapeutic Drug Monitoring of Levetiracetam in Select Populations.

Levetiracetam (LEV) is a broad spectrum antiepileptic drug (AED) that has a more favorable side effect profile compared to older AEDs. Therapeutic drug monitoring (TDM) of LEV is generally unnecessary given its linear and predictable dose-serum concentration relationship, lack of drug-drug interactions, and broad therapeutic window. However, there is growing evidence showing that alteration of LEV pharmacokinetics (PK) may occur in special populations calling for the need for TDM. The purpose of this review...

Comment on "Methadone Dose Adjustments, Plasma R-Methadone Levels and Therapeutic Outcome of Heroin Users: A Randomized Clinical Trial".

Adverse Drug Reaction Reporting in Institutions Across Six Chinese Provinces: A Cross-sectional Study.

Although China's adverse drug reaction (ADR) reporting and monitoring has developed rapidly, many challenges remain. This study assessed ADR monitoring and reporting in China and identified monitoring problems.

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