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https://www.readbyqxmd.com/read/28441215/does-low-dose-methotrexate-deserve-more-respect-from-clinicians
#1
Brent Luu, George W Rodway
Medical errors associated with low-dose methotrexate may be life-threatening. Prescribers should be cognizant of the medication's toxicities and the persistent challenges in preventing adverse events. This article reviews the properties of methotrexate and its common drug-drug interactions. Best practices from the Institute for Safe Medication Practices, aimed at reducing methotrexate errors, are highlighted.
May 2017: JAAPA: Official Journal of the American Academy of Physician Assistants
https://www.readbyqxmd.com/read/28435058/in-vitro-and-in-vivo-evaluation-of-gastro-retentive-carvedilol-loaded-chitosan-beads-using-gastroplus%C3%A2
#2
Radhakrishnan Praveen, Priya Ranjan Prasad Verma, Jayachandran Venkatesan, Dong-Han Yoon, Se-Kwon Kim, Sandeep Kumar Singh
The objective of present investigation was to develop gastro-retentive controlled release system of carvedilol using biological macromolecule, chitosan. 3(2) full factorial design was adopted for optimization of tripolyphosphate (X1) and curing time (X2). Bead stability in 0.1N HCl, buoyancy duration, density, drug loading, dissolution efficiency and cumulative percentage release at 8th hour were evaluated as dependent variables. The levels of X1 and X2 of optimized formulation having maximum desirability was found to 2...
April 20, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28434375/the-role-of-adaptive-trial-designs-in-drug-development
#3
François Curtin, Stephane Heritier
Clinical development of new drugs is a long and costly process. There is a need to find solutions which can improve and shorten this process. By introducing flexibility in to the design of clinical trials, adaptive design contributes to this improvement and allows to reach drug development decisions in a quicker way. Areas covered: We review the main methodological approaches to adaptive trial design, introducing key statistical concepts. For each phase of the clinical development, different uses and implementations of adaptive trial (AD) design are presented and examples of recent clinical trials are given...
April 24, 2017: Expert Review of Clinical Pharmacology
https://www.readbyqxmd.com/read/28429389/evaluation-of-real-time-data-obtained-from-gravimetric-preparation-of-antineoplastic-agents-shows-medication-errors-with-possible-critical-therapeutic-impact-results-of-a-large-scale-multicentre-multinational-retrospective-study
#4
R Terkola, M Czejka, J Bérubé
WHAT IS KNOWN AND OBJECTIVE: Medication errors are a significant cause of morbidity and mortality especially with antineoplastic drugs, owing to their narrow therapeutic index. Gravimetric workflow software systems have the potential to reduce volumetric errors during intravenous antineoplastic drug preparation which may occur when verification is reliant on visual inspection. Our aim was to detect medication errors with possible critical therapeutic impact as determined by the rate of prevented medication errors in chemotherapy compounding after implementation of gravimetric measurement...
April 21, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/28425352/overdose-in-young-children-treated-with-anti-reflux-medications-poisons-enquiry-evidence-of-excess-10-fold-dosing-errors-with-ranitidine
#5
C Crawford, M Anderson, G Cooper, G Jackson, J Thompson, A Vale, Shl Thomas, M Eddleston, D N Bateman
BACKGROUND: Accidental drug overdose is a common problem in young children. We examined the influence of formulation and dose in enquiries for different gastro-oesophageal reflux disease treatments in children under 5 years to the UK's National Poisons Information Service. METHODS: Overdose characteristics with ranitidine, omeprazole or domperidone were compared with those of metoclopramide and the H-1 antagonist chlorphenamine, for the period 1 July 2007 to 30 June 2015...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28422112/accurate-and-effective-multidrug-resistant-mycobacterium-tuberculosis-detection-method-using-gap-filling-ligation-coupled-with-high-resolution-capillary-electrophoresis-based-single-strand-conformation-polymorphism
#6
Woong Choi, Jongseok Lee, Eunjin Cho, Gyoo Yeol Jung
Tuberculosis (TB) has severely threatened public health via emerging multidrug-resistant (MDR) and extensively drug-resistant (XDR) Mycobacterium tuberculosis (MTB) strains. For effective TB treatment, rapid, accurate, and multiplex detection of drug resistance is extremely important. However, conventional methods for TB diagnosis are time consuming and have a limited effect on treatment. Nucleic acid-based molecular detection methods have been developed as an effective MDR/XDR-TB diagnosis technology. Among the nucleic acid-based methods, ligation-dependent methods are attractive as MDR/XDR-MTB detection technologies, but multiplex analysis is limited by the detection method...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28420924/physicians-and-nurses-medical-errors-associated-with-communication-failures
#7
Ibrahim Topcu, Ayse Sonay Turkmen, Nejla Canbulat Sahiner, Sevim Savaser, Hanife Sen
OBJECTIVE: To determine medical errors associated with communication failures among physicians and nurses. METHODS: This cross-sectional, descriptive study was conducted at 20 state hospitals and 14 training and research hospitals affiliated with the Istanbul City Health Directorate in Turkey, and comprised physicians and nurses. Data were collected between August 2012 and February 2013. A 16-item questionnaire was used that included questions regarding socio-demographic features such as age, gender, educational status, institution, occupation and working years...
April 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28420545/gqsar-modeling-and-combinatorial-library-generation-of-4-phenylquinazoline-2-carboxamide-derivatives-as-antiproliferative-agents-in-human-glioblastoma-tumors
#8
Debolina Goswami, Sukriti Goyal, Salma Jamal, Ritu Jain, Divya Wahi, Abhinav Grover
BACKGROUND: TSPO translocator protein, encoded in humans by the Tspo gene plays a crucial role in mitochondria mediated apoptosis and necrotic cell death through its association with Mitochondrial Permeability Transition pore (MPTP). It has been shown that this function can be exploited as a potential treatment for human Glioblastoma Multiforme. In this study, a novel robust fragment based QSAR model has been developed for a series of 4-phenylquinazoline-2-carboxamides experimentally known to be ligands for TSPO, thus triggering apoptotic mechanism cascade...
April 4, 2017: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/28419925/characterization-and-application-of-restricted-access-carbon-nanotubes-in-online-extraction-of-anticonvulsant-drugs-from-plasma-samples-followed-by-liquid-chromatography-analysis
#9
Rodrigo Campos Dos Santos, Adriana Kaori Kakazu, Mariane Gonçalves Santos, Fábio Antônio Belinelli Silva, Eduardo Costa Figueiredo
Anticonvulsant drugs are often used in the treatment of epilepsy. However, their therapeutic monitoring is often necessary in order to obtain an appropriate dose adjustment, due to the proximity between their therapeutic and toxic ranges. The aim of this study was to carry out the synthesis, characterization and use of restricted access carbon nanotubes (RACNTs) in an online method for the analyses of phenobarbital and carbamazepine and primidone from untreated human blood plasma by column switching liquid chromatography...
April 11, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28418263/systematic-bias-in-predictions-of-new-drugs-budget-impact-analysis-of-a-sample-of-recent-us-drug-launches
#10
Michael S Broder, Jenelle M Zambrano, Jackie Lee, Richard S Marken
OBJECTIVE: Expectations about the budget impact of new drug launches may affect payer behavior and ultimately consumer costs. Therefore, we evaluated the accuracy of pre-launch US budget impact estimates for a sample of new drugs. METHODS: We searched for publicly available budget impact estimates made pre-launch for drugs approved in the US from 1(st) September 2010 to 1(st) September 2015 and compared them to actual sales. Accuracy was calculated as the ratio of pre-launch estimate to actual sales...
April 18, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/28417544/urine-biomarkers-of-acute-kidney-injury-in-noncritically-ill-hospitalized-children-treated-with-chemotherapy
#11
Maya Sterling, Zubaida Al-Ismaili, Kelly R McMahon, Melissa Piccioni, Michael Pizzi, Theresa Mottes, Larry C Lands, Sharon Abish, Adam J Fleming, Michael R Bennett, Ana Palijan, Prasad Devarajan, Stuart L Goldstein, Maureen M O'Brien, Michael Zappitelli
BACKGROUND: Cisplatin (Cis), carboplatin (Carb), and ifosfamide (Ifos) are common nephrotoxic chemotherapies. Biomarkers of tubular injury may allow for early acute kidney injury (AKI) diagnosis. PROCEDURE: We performed a two-center (Canada, United States) pilot study to prospectively measure serum creatinine (SCr), urine neutrophil gelatinase-associated lipocalin (NGAL), and interleukin-18 (IL-18) in children receiving Cis/Carb (27 episodes), Ifos (30 episodes), and in 15 hospitalized, nonchemotherapy patients...
April 18, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28417463/pharmacological-interventions-for-primary-sclerosing-cholangitis-an-attempted-network-meta-analysis
#12
REVIEW
Francesca Saffioti, Kurinchi Selvan Gurusamy, Neil Hawkins, Clare D Toon, Emmanuel Tsochatzis, Brian R Davidson, Douglas Thorburn
BACKGROUND: Primary sclerosing cholangitis is a chronic cholestatic liver disease that is associated with both hepatobiliary and colorectal malignancies, which can result in liver cirrhosis and its complications. The optimal pharmacological treatment for patients with primary sclerosing cholangitis remains controversial. OBJECTIVES: To assess the comparative benefits and harms of different pharmacological interventions in people with primary sclerosing cholangitis by performing a network meta-analysis, and to generate rankings of available pharmacological interventions according to their safety and efficacy...
March 28, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28417303/paediatric-in-patient-prescribing-errors-in-malaysia-a-cross-sectional-multicentre-study
#13
Teik Beng Khoo, Jing Wen Tan, Hoong Phak Ng, Chong Ming Choo, Intan Nor Chahaya Bt Abdul Shukor, Siao Hean Teh
Background There is a lack of large comprehensive studies in developing countries on paediatric in-patient prescribing errors in different settings. Objectives To determine the characteristics of in-patient prescribing errors among paediatric patients. Setting General paediatric wards, neonatal intensive care units and paediatric intensive care units in government hospitals in Malaysia. Methods This is a cross-sectional multicentre study involving 17 participating hospitals. Drug charts were reviewed in each ward to identify the prescribing errors...
April 17, 2017: International Journal of Clinical Pharmacy
https://www.readbyqxmd.com/read/28417291/reward-prediction-errors-in-drug-addiction-and-parkinson-s-disease-from-neurophysiology-to-neuroimaging
#14
REVIEW
Isabel García-García, Yashar Zeighami, Alain Dagher
PURPOSE OF REVIEW: Surprises are important sources of learning. Cognitive scientists often refer to surprises as "reward prediction errors," a parameter that captures discrepancies between expectations and actual outcomes. Here, we integrate neurophysiological and functional magnetic resonance imaging (fMRI) results addressing the processing of reward prediction errors and how they might be altered in drug addiction and Parkinson's disease. RECENT FINDINGS: By increasing phasic dopamine responses, drugs might accentuate prediction error signals, causing increases in fMRI activity in mesolimbic areas in response to drugs...
June 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28416644/evaluation-of-different-estimation-methods-for-accuracy-and-precision-in-biological-assay-validation
#15
Binbing Yu, Harry Yang
Biological assays (bioassays) are procedures to estimate the potency of a substance by studying its effects on living organisms, tissues, and cells. Bioassays are essential tools for gaining insight into biologic systems and processes including, for example, the development of new drugs and monitoring environmental pollutants. Two of the most important parameters of bioassay performance are relative accuracy (bias) and precision. Although general strategies and formulas are provided in USP 〈1033〉, a comprehensive understanding of the definitions of bias and precision remain elusive...
April 17, 2017: PDA Journal of Pharmaceutical Science and Technology
https://www.readbyqxmd.com/read/28414927/integration-of-free-hand-3d-ultrasound-and-mobile-c-arm-cone-beam-ct-feasibility-and-characterization-for-real-time-guidance-of-needle-insertion
#16
E Marinetto, A Uneri, T De Silva, S Reaungamornrat, W Zbijewski, A Sisniega, S Vogt, G Kleinszig, J Pascau, J H Siewerdsen
This work presents development of an integrated ultrasound (US)-cone-beam CT (CBCT) system for image-guided needle interventions, combining a low-cost ultrasound system (Interson VC 7.5MHz, Pleasanton, CA) with a mobile C-arm for fluoroscopy and CBCT via use of a surgical tracker. Imaging performance of the ultrasound system was characterized in terms of depth-dependent contrast-to-noise ratio (CNR) and spatial resolution. US-CBCT system was evaluated in phantom studies simulating three needle-based procedures: drug delivery, tumor ablation, and lumbar puncture...
April 3, 2017: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/28413952/building-new-bridges-between-in-vitro-and-in-vivo-in-early-drug-discovery-where-molecular-modeling-meets-systems-biology
#17
Robert A Pearlstein, Daniel J J McKay, Viktor Hornak, Callum Dickson, Andrei Golosov, Tyler Harrison, Camilo Velez-Vega, José Duca
Cellular drug targets exist within networked function generating systems whose constituent molecular species undergo dynamic interdependent non-equilibrium state transitions in response to specific perturbations (i.e. inputs). Cellular phenotypic behaviors are manifest through the integrated behaviors of such networks. However, in vitro data are frequently measured and/or interpreted with empirical equilibrium or steady state models (e.g. Hill, Michaelis-Menten, Briggs-Haldane) relevant to isolated target populations...
April 14, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28410978/performance-monitoring-in-nicotine-dependence-considering-integration-of-recent-reinforcement-history
#18
Kevin Butler, Jennifer Rusted, Paul Gard, Anne Jackson
INTRODUCTION: Impaired monitoring of errors and conflict (performance monitoring; PM) is well documented in substance dependence (SD) including nicotine dependence and may contribute to continued drug use. Contemporary models of PM and complementary behavioural evidence suggest that PM works by integrating recent reinforcement history rather than evaluating individual behaviours. Despite this, studies of PM in SD have typically used indices derived from reaction to task error or conflict on individual trials...
April 11, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28410711/failure-modes-and-effects-analysis-of-bilateral-same-day-cataract-surgery
#19
Neal H Shorstein, Carol Lucido, James Carolan, Liyan Liu, Geraldine Slean, Lisa J Herrinton
PURPOSE: To systematically analyze potential process failures related to bilateral same-day cataract surgery toward the goal of improving patient safety. SETTING: Twenty-one Kaiser Permanente surgery centers, Northern California, USA. DESIGN: Retrospective cohort study. METHODS: Quality experts performed a Failure Modes and Effects Analysis (FMEA) that included an evaluation of sterile processing, pharmaceuticals, perioperative clinic and surgical center visits, and biometry...
March 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28407406/phenobarbital-in-intensive-care-unit-pediatric-population-predictive-performances-of-population-pharmacokinetic-model
#20
Amélie Marsot, Fabrice Michel, Estelle Chasseloup, Olivier Paut, Romain Guilhaumou, Olivier Blin
An external evaluation of phenobarbital population pharmacokinetic model described by Marsot et al. was performed in pediatric intensive care unit. Model evaluation is an important issue for dose adjustment. This external evaluation should allow confirming the proposed dosage adaptation and extending these recommendations to the entire intensive care pediatric population. External evaluation of phenobarbital published population pharmacokinetic model of Marsot et al. was realized in a new retrospective dataset of 35 patients hospitalized in a pediatric intensive care unit...
April 13, 2017: Fundamental & Clinical Pharmacology
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