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https://www.readbyqxmd.com/read/29504673/inhibition-of-in-vitro-metabolism-of-opioids-by-skeletal-muscle-relaxants
#1
David E Moody, Yueqiao Fu, Wenfang B Fang
The purpose of this study was to test the hypothesis that skeletal muscle relaxants could inhibit the in vitro metabolism of common comedications opioids buprenorphine, methadone and oxycodone. The compounds [solubility-limited concentration (μM) studied] were as follows: baclofen (1000), carisoprodol (200), its metabolite meprobamate (1000), chlorzoxazone (200), cyclobenzaprine (1000), metaxalone (50), methocarbamol (1000), orphenadrine (1000) and tizanidine (1000). Compounds were first incubated with human liver microsomes ± pre-incubation, screened with pathway-specific cDNA-expressed cytochrome P450s (rCYP), and then IC50 values determined using either 8-concentration tests for those where the rCYP screen suggested an IC50 was achievable, or a 3-concentration test with downward extrapolation if screen suggested 50% inhibition was not achievable...
March 5, 2018: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29426120/contaminants-of-emerging-concern-in-the-hartbeespoort-dam-catchment-and-the-umngeni-river-estuary-2016-pollution-incident-south-africa
#2
Cornelius Rimayi, David Odusanya, Jana M Weiss, Jacob de Boer, Luke Chimuka
A quantitative assessment of pollutants of emerging concern in the Hartbeespoort Dam catchment area was conducted using liquid chromatography-tandem mass spectrometry (LC-MS/MS) to establish the occurrence, source and distribution of 15 environmental pollutants, including 10 pharmaceuticals, 1 pesticide and 4 steroid hormones. Seasonal sampling was conducted in the Hartbeespoort Lake using sub-surface grab sampling to determine the lake's ecological status and obtain data for establishment of progressive operational monitoring...
June 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29204951/-real-life-efficacy-and-tolerability-of-methocarbamol-in-patients-suffering-from-refractory-muscle-related-low-back-pain-results-of-a-health-care-research-project-based-on-data-from-the-german-pain-practice-registry
#3
Michael A Überall, Oliver M D Emrich, Gerhard H H Müller-Schwefe
BACKGROUND: Subacute, muscle-related low/back pain (L/BP) is known to be difficult to treat and frequently requires more specific causal-oriented treatments with agents improving the increased muscle tone. Currently, only methocarbamol is approved and available for the 1st-line treatment of patients with muscle-related L/BP in Germany - however, without sufficient data on longer lasting effects (> 1 week) in elsewhere refractory patients. METHOD: Noninterventional cohort study, based on anonymized routine data of the German pain practice registry; retrospective evaluation of patients with refractory L/BP, who first time received a treatment with methocarbamol between October 1st until December 31st, 2015, and who documented their response to treatment with the standardized and validated instruments of the German pain questionnaire over at least 4 weeks (n = 251 patients)...
December 2017: MMW Fortschritte der Medizin
https://www.readbyqxmd.com/read/29089169/a-randomized-double-blind-placebo-controlled-trial-of-naproxen-with-or-without-orphenadrine-or-methocarbamol-for-acute-low-back-pain
#4
Benjamin W Friedman, David Cisewski, Eddie Irizarry, Michelle Davitt, Clemencia Solorzano, Adam Nassery, Scott Pearlman, Deborah White, E John Gallagher
STUDY OBJECTIVE: In US emergency departments (EDs), patients with low back pain are often treated with nonsteroidal anti-inflammatory drugs and muscle relaxants. We compare functional outcomes among patients randomized to a 1-week course of naproxen+placebo versus naproxen+orphenadrine or naproxen+methocarbamol. METHODS: This was a randomized, double-blind, comparative effectiveness trial conducted in 2 urban EDs. Patients presenting with acute, nontraumatic, nonradicular low back pain were enrolled...
March 2018: Annals of Emergency Medicine
https://www.readbyqxmd.com/read/28664354/impact-of-medicine-withdrawal-on-reporting-of-adverse-events-involving-therapeutic-alternatives-a-study-from-the-french-spontaneous-reporting-database
#5
Cécile Pageot, Julien Bezin, Andy Smith, Mickael Arnaud, Francesco Salvo, Françoise Haramburu, Bernard Bégaud, Antoine Pariente
INTRODUCTION: The consequences of the withdrawal of marketing authorisation of drugs have mostly been studied considering drug prescription patterns for the therapeutic alternatives of the withdrawn drugs. The potential concomitant changes in the reporting of adverse reactions concerning these alternatives have been studied less often. OBJECTIVE: The objective of this study was to analyse the changes in the reporting of adverse events (AEs) for therapeutic alternatives after the withdrawal of three medicines (dextropropoxyphene, pioglitazone and tetrazepam) from the market for safety reasons...
November 2017: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
https://www.readbyqxmd.com/read/28516057/comparison-of-atracurium-and-methocarbamol-for-preventing-succinylcholine-induced-muscle-fasciculation-a-randomized-controlled-trial
#6
Gholamreza Shabanian, Mohammadreza Shabanian, Alireza Shabanian, Saeid Heidari-Soureshjani
Fasciculation is a minor adverse effect of succinylcholine and may be an unpleasant experience for patient. The aim of this study was to compare the use of atracurium and methocarbamol to decrease the occurrence and severity of succinylcholine-induced muscle fasciculation. Fifty-nine adults with American Society of Anesthesiologists I or II hospitalized for elective surgery were randomly assigned to two groups: Group A (n = 29) who received succinylcholine 1 mg/kg body weight (BW) intravenously followed by 0...
April 2017: Journal of Advanced Pharmaceutical Technology & Research
https://www.readbyqxmd.com/read/28319370/uptake-and-disposition-of-select-pharmaceuticals-by-bluegill-exposed-at-constant-concentrations-in-a-flow-through-aquatic-exposure-system
#7
Jian-Liang Zhao, Edward T Furlong, Heiko L Schoenfuss, Dana W Kolpin, Kyle L Bird, David J Feifarek, Eric A Schwab, Guang-Guo Ying
The increasing use of pharmaceuticals has led to their subsequent input into and release from wastewater treatment plants, with corresponding discharge into surface waters that may subsequently exert adverse effects upon aquatic organisms. Although the distribution of pharmaceuticals in surface water has been extensively studied, the details of uptake, internal distribution, and kinetic processing of pharmaceuticals in exposed fish have received less attention. For this research, we investigated the uptake, disposition, and toxicokinetics of five pharmaceuticals (diclofenac, methocarbamol, rosuvastatin, sulfamethoxazole, and temazepam) in bluegill sunfish (Lepomis macrochirus) exposed to environmentally relevant concentrations (1000-4000 ng L-1) in a flow-through exposure system...
April 18, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28088301/methocarbamol-use-is-associated-with-decreased-hospital-length-of-stay-in-trauma-patients-with-closed-rib-fractures
#8
Asad E Patanwala, Ohoud Aljuhani, Brian J Kopp, Brian L Erstad
BACKGROUND: The objective of this study was to evaluate the effect of methocarbamol on hospital length of stay in patients with closed rib fracture injuries. METHODS: This was a retrospective cohort study conducted in an academic medical center in the United States. Adult trauma patients, who sustained closed rib fractures, were included. Patients were categorized based on whether they received methocarbamol or not during admission. The primary outcome of interest was time to hospital discharge in days (i...
October 2017: American Journal of Surgery
https://www.readbyqxmd.com/read/27902906/generalized-tetanus-in-a-gyrfalcon-falco-rusticolus-with-pododermatitis
#9
Hugues Beaufrère, Delphine Laniesse, Paul Stickings, Robert Tierney, Thea Sesardic, Durda Slavic, Nicole Compo, Dale A Smith
A 2-yr-old male gyrfalcon ( Falco rusticolus ) was presented for severe and generalized muscle spasticity and pododermatitis. The falcon had been treated for pododermatitis over the previous 4 mo. Muscle rigidity and spasms involved the entire bird but were more severe on the right leg. The bird was also tachypneic and hyperthermic at 45 C. While the plantar pododermatitis lesions had healed, there was still a small abscess on the lateral aspect of the right foot. Clinical signs were consistent with tetanus...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27850478/840-methocarbamol-decreases-hospital-length-of-stay-in-trauma-patients-with-rib-fractures
#10
Asad Patanwala, Ohoud Aljuhani, Brian Kopp, Brian Erstad
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27645932/inhibition-of-pseudoperoxiadse-activity-of-human-red-blood-cell-hemoglobin-by-methocarbamol
#11
Dariush Minai-Tehrani, Sara Toofani, Fatemeh Yazdi, Arash Minai-Tehrani, Hamidreza Mollasalehi, Kourosh Bakhtiari Ziabari
After red blood cells lysis, hemoglobin is released to blood circulation. Hemoglobin is carried in blood by binding to haptoglobin. In normal individuals, no free hemoglobin is observed in the blood, because most of the hemoglobin is in the form of haptoglobin complex. In some diseases that are accompanied by hemolysis, the amount of released hemoglobin is higher than its complementary haptoglobin. As a result, free hemoglobin appears in the blood, which is a toxic compound for these patients and may cause renal failure, hypertensive response and risk of atherogenesis...
January 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/26924025/pharmacokinetics-of-methocarbamol-and-phenylbutazone-in-exercised-thoroughbred-horses
#12
H K Knych, S D Stanley, K N Seminoff, D S McKemie, P H Kass
Methocarbamol (MCBL) is commonly used in performance horses for the treatment of skeletal muscle disorders. Current regulatory recommendations for show horses and racehorses are based on a single oral dose of 5 g, although doses in excess of this are often administered. The goal of the current study was to characterize the disposition of MCBL following higher dose administration and administration in combination with another commonly used drug in performance horses, phenylbutazone (PBZ). Exercised Thoroughbred horses were administered various doses of MCBL as a sole agent and MCBL in combination with PBZ...
October 2016: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/26867555/derivative-quotient-spectrophotometry-and-an-eco-friendly-micellar-chromatographic-approach-with-time-programmed-uv-detection-for-the-separation-of-two-fluoroquinolones-and-phenazopyridine
#13
Manar M Tolba, Mohamed M Salim
In this study, two analytical approaches were exploited for the resolution of binary mixtures of ciprofloxacin HCl (CIP) or norfloxacin (NOR) and phenazopyridine HCl (PHZ). In the first approach, the amplitudes of the first derivative of the ratio spectra were measured at 267 or 287 nm for CIP and at 268 or 291 nm for NOR. PHZ could be directly determined in the presence of CIP or NOR at 405 nm. The calibration graphs were rectilinear over the ranges of 1.0-16.0 µg/mL for CIP or NOR and 1.0-10.0 µg/mL for PHZ...
May 2016: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/26791416/anticholinergic-risk-and-frequency-of-anticholinergic-drug-prescriptions-in-a-population-older-than-65
#14
Jorge Enrique Machado-Alba, Alejandro Castro-Rodríguez, John Alexander Álzate-Piedrahita, Julián Andrés Hoyos-Pulgarín, Diego Alejandro Medina-Morales
OBJECTIVE: To determine the risk and frequency of anticholinergic drug prescriptions in a population affiliated with the Colombian General System of Social Security in Health. DESIGN: A cross-sectional study was conducted in 2013. PARTICIPANTS: Patients older than 65 years who received drugs with the potential to block cholinergic receptors, in accordance with an anticholinergic risk scale. MEASUREMENTS: The total anticholinergic load was determined by the sum of the risk of each prescribed drug...
March 1, 2016: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/26561986/complex-mixtures-complex-responses-assessing-pharmaceutical-mixtures-using-field-and-laboratory-approaches
#15
Heiko L Schoenfuss, Edward T Furlong, Pat J Phillips, Tia-Marie Scott, Dana W Kolpin, Marina Cetkovic-Cvrlje, Kelsey E Lesteberg, Daniel C Rearick
Pharmaceuticals are present in low concentrations (<100 ng/L) in most municipal wastewater effluents but may be elevated locally because of factors such as input from pharmaceutical formulation facilities. Using existing concentration data, the authors assessed pharmaceuticals in laboratory exposures of fathead minnows (Pimephales promelas) and added environmental complexity through effluent exposures. In the laboratory, larval and mature minnows were exposed to a simple opioid mixture (hydrocodone, methadone, and oxycodone), an opioid agonist (tramadol), a muscle relaxant (methocarbamol), a simple antidepressant mixture (fluoxetine, paroxetine, venlafaxine), a sleep aid (temazepam), or a complex mixture of all compounds...
April 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/26469684/effect-of-methocarbamol-on-acute-pain-after-traumatic-injury
#16
Ohoud Aljuhani, Brian J Kopp, Asad E Patanwala
There is interest in the use of methocarbamol as an adjunctive agent for pain control after traumatic injury. The primary objective of this study was to determine the effect of methocarbamol on pain measurements after acute injury. This was a retrospective, matched cohort study conducted at an academic medical center in the United States. Consecutive adult (age ≥18 years) patients who were admitted to the hospital between June 1, 2012 and June 30, 2013 because of a traumatic injury were evaluated. Patient cases receiving methocarbamol for at least 3 days were matched to controls that did not receive methocarbamol based on age, sex, and injury severity...
March 2017: American Journal of Therapeutics
https://www.readbyqxmd.com/read/26168743/-methocarbamol-in-acute-low-back-pain-a-randomized-double-blind-controlled-study
#17
RANDOMIZED CONTROLLED TRIAL
Oliver M D Emrich, Klaus A Milachowski, Martin Strohmeier
BACKGROUND: Muscle relaxants are widely used to treat low back pain (LBP), one of the most frequent health problems in industrialized countries. For this indication, the European Medicines Agency (EMA) recently had imposed restrictions for some muscle relaxants, anti-inflammatories and analgesics; Tetrazepam even had to be withdrawn from the market. Therefore methocarbamol remains the only approved muscle relaxant. Methocarbamol is well-established for the treatment of LBP associated with myofascial components, although more recent clinical studies have not been published...
July 2015: MMW Fortschritte der Medizin
https://www.readbyqxmd.com/read/25662558/deep-dry-needling-of-trigger-points-located-in-the-lateral-pterygoid-muscle-efficacy-and-safety-of-treatment-for-management-of-myofascial-pain-and-temporomandibular-dysfunction
#18
RANDOMIZED CONTROLLED TRIAL
Luis-Miguel Gonzalez-Perez, Pedro Infante-Cossio, Mercedes Granados-Nunez, Francisco-Javier Urresti-Lopez, Ricardo Lopez-Martos, Pablo Ruiz-Canela-Mendez
BACKGROUND: To determine whether deep dry needling (DDN) of trigger points (TPs) in the lateral pterygoid muscle (LPM) would significantly reduce pain and improve function, compared with methocarbamol/paracetamol medication. MATERIAL AND METHODS: Forty-eight patients with chronic myofascial pain located in the LPM were selected and randomly assigned to one of two groups (DDN test group, n=24; drug-treated control group, n=24). The test group received three applications of needling of the LPM once per week for three weeks, while control group patients were given two tablets of a methocarbamol/paracetamol combination every six hours for three weeks...
May 1, 2015: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/25659736/smart-manipulation-of-ratio-spectra-for-resolving-a-pharmaceutical-mixture-of-methocarbamol-and-paracetamol
#19
Hebatallah M Essam, Mohamed K Abd-El Rahman
Two smart, specific, accurate and precise spectrophotometric methods manipulating ratio spectra are developed for simultaneous determination of Methocarbamol (METH) and Paracetamol (PAR) in their combined pharmaceutical formulation without preliminary separation. Method A, is an extended ratio subtraction one (EXRSM) coupled with ratio subtraction method (RSM), which depends on subtraction of the plateau values from the ratio spectrum. Method B is a ratio difference spectrophotometric one (RDM) which measures the difference in amplitudes of ratio spectra between 278 and 286 nm for METH and 247 and 260 nm for PAR...
April 15, 2015: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/25243817/extraction-of-methocarbamol-from-human-plasma-with-a-polypyrrole-multiwalled-carbon-nanotubes-composite-decorated-with-magnetic-nanoparticles-as-an-adsorbent-followed-by-electrospray-ionization-ion-mobility-spectrometry-detection
#20
Mohammad Saraji, Taghi Khayamian, Zahra Hashemian
In this work, a polypyrrole/multiwalled carbon nanotubes composite decorated with Fe3 O4 nanoparticles was chemically synthesized and applied as a novel adsorbent for the extraction of methocarbamol from human plasma. Electrospray ionization ion mobility spectrometry was used for the determination of the analyte. The properties of the magnetic-modified adsorbent were characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform IR spectroscopy, and X-ray diffraction. The effects of experimental parameters on the extraction efficiency of the sorbent were investigated...
December 2014: Journal of Separation Science
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