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https://www.readbyqxmd.com/read/29241093/quantitative-analysis-of-drugs-in-hair-by-uhplc-high-resolution-mass-spectrometry
#1
Robert Kronstrand, Malin Forsman, Markus Roman
Liquid chromatographic methods coupled to high resolution mass spectrometry are increasingly used to identify compounds in various matrices including hair but there are few recommendations regarding the parameters and their criteria to identify a compound. In this study we present a method for the identification and quantification of a range of drugs and discuss the parameters used to identify a compound with high resolution mass spectrometry. Drugs were extracted from hair by incubation in a buffer:solvent mixture at 37°C during 18h...
December 8, 2017: Forensic Science International
https://www.readbyqxmd.com/read/29236495/a-stable-heroin-analog-that-can-serve-as-a-vaccine-hapten-to-induce-antibodies-that-block-the-effects-of-heroin-and-its-metabolites-in-rodents-and-that-cross-react-immunologically-with-related-drugs-of-abuse
#2
Agnieszka Sulima, Rashmi Jalah, Joshua F G Antoline, Oscar B Torres, Gregory H Imler, Jeffrey R Deschamps, Zoltan Beck, Carl R Alving, Arthur E Jacobson, Kenner C Rice, Gary R Matyas
An improved synthesis of a haptenic heroin surrogate 1 (6-AmHap) is reported. The intermediate needed for the preparation of 1 was described in the route in the synthesis of 2 (DiAmHap). A scalable procedure was developed to install the C-3 amido group. Using the Boc protectng group in 18 allowed preparation of 1 in an overall yield of 53% from 4 and eliminated the necessity of preparing the diamide 13. Hapten 1 was conjugated to tetanus toxoid and mixed with liposomes containing monophosphoryl lipid A as an adjuvant...
December 13, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29233109/prevalence-and-correlates-of-substance-use-among-health-care-students-in-nepal-a-cross-sectional-study
#3
Bimala Panthee, Suresh Panthee, Saroj Gyawali, Norito Kawakami
BACKGROUND: Substance use among health care students threatens professional standards and the delivery of quality services, potentially placing the public at risk. Therefore, our study aims to determine the prevalence and correlates associated with substance use among Nepalese health care students. METHOD: A cross-sectional survey using a self-administered health professional questionnaire was conducted among pharmacy, nursing, and public health students at three universities in Nepal in 2010...
December 12, 2017: BMC Public Health
https://www.readbyqxmd.com/read/29222361/evaluation-of-opioid-prescribing-after-rescheduling-of-hydrocodone-containing-products
#4
M Brooke Bernhardt, Ruston S Taylor, Joseph L Hagan, Nihar Patel, Corrie E Chumpitazi, Karin A Fox, Chris Glover
PURPOSE: Institutional prescribing trends of hydrocodone-containing products (HCPs) before and after the Drug Enforcement Administration's rescheduling of HCPs were evaluated. METHODS: A retrospective evaluation was performed on 6 oral opioid analgesics on the hospital formulary that were prescribed to patients treated at Texas Children's Hospital and Pavilion for Women for the 6 months before and after the rescheduling of HCPs on October 6, 2014. Patients were eligible for inclusion if they were prescribed any of the following oral agents: HCPs (e...
December 15, 2017: American Journal of Health-system Pharmacy: AJHP
https://www.readbyqxmd.com/read/29220343/two-techniques-to-sample-non-volatiles-in-breath-exemplified-by-methadone
#5
Göran Ljungkvist, Shahid Ullah, Åsa Tinglev, Karina Stein, Björn Bake, Per Larsson, Ann-Charlotte Almstrand, Emilia Viklund, Oscar Hammar, Sören Sandqvist, Olof Beck, Anna-Carin Olin
The particles in exhaled breath provide a promising matrix for the monitoring of pathological processes in the airways, and also allow exposure to exogenous compounds to be to assessed. The collection is easy to perform and is non-invasive. The aim of the present study is to assess if an exogenous compound-methadone-is distributed in the lining fluid of small airways, and to compare two methods for collecting methadone in particles in exhaled breath. Exhaled particles were collected from 13 subjects receiving methadone maintenance treatment...
December 8, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/29210063/opioid-induced-inhibition-of-the-human-serotonin-and-norepinephrine-transporters-in-vitro-link-to-clinical-reports-of-serotonin-syndrome
#6
Anna Rickli, Evangelia Liakoni, Marius C Hoener, Matthias E Liechti
BACKGROUND AND PURPOSE: Opioids may inhibit the serotonin and norepinephrine transporters (SERT and NET, respectively). NET inhibition may contribute to analgesia, and SERT inhibition or interactions with serotonin receptors may cause serotonergic toxicity. However, the effects of different opioids on the human SERT, NET, and serotonin receptors have not been sufficiently studied. EXPERIMENTAL APPROACH: We determined the potencies of different opioids to inhibit the SERT and NET in vitro using human transporter-transfected cells...
December 6, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29205946/surveillance-of-drug-abuse-in-hong-kong-by-hair-analysis-using-lc-ms-ms
#7
K Wing Leung, Zack C F Wong, Janet Y M Ho, Ada W S Yip, Jerry K H Cheung, Karen K L Ho, Ran Duan, Karl W K Tsim
The aim of this study is to reveal the habits of drug abusers in hair samples from drug rehabilitation units in Hong Kong. With the application of LC-MS/MS technology, a total of 1,771 hair samples were analyzed during the period (Jan 2012 to Mar 2016) of hair testing service provided to fourteen drug rehabilitation units including non-governmental organizations (NGOs), rehabilitation centers and medical clinics. Hair samples were analyzed for abused drugs and their metabolites simultaneously, including ketamine, norketamine, cocaine, benzoylecgonine, cocaethylene, norcocaine, codeine, MDMA, MDA, MDEA, amphetamine, methamphetamine, morphine, 6-acetylmorphine, phencyclidine and methadone...
December 4, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/29197244/systematic-assessment-of-different-solvents-for-the-extraction-of-drugs-of-abuse-and-pharmaceuticals-from-an-authentic-hair-pool
#8
Milena M Madry, Thomas Kraemer, Markus R Baumgartner
Hair analysis has been established as a prevalent tool for retrospective drug monitoring. In this study, different extraction solvents for the determination of drugs of abuse and pharmaceuticals in hair were evaluated for their efficiency. A pool of authentic hair from drug users was used for extraction experiments. Hair was pulverized and extracted in triplicate with seven different solvents in a one- or two-step extraction. Three one- (methanol, acetonitrile, and acetonitrile/water) and four two-step extractions (methanol two-fold, methanol and methanol/acetonitrile/formate buffer, methanol and methanol/formate buffer, and methanol and methanol/hydrochloric acid) were tested under accurately equal experimental conditions...
November 23, 2017: Forensic Science International
https://www.readbyqxmd.com/read/29186453/detection-and-quantification-of-codeine-6-glucuronide-hydromorphone-3-glucuronide-oxymorphone-3-glucuronide-morphine-3-glucuronide-and-morphine-6-glucuronide-in-human-hair-from-opioid-users-by-lc-ms-ms
#9
Megan Grabenauer, Nichole D Bynum, Katherine N Moore, Robert M White, John M Mitchell, Eugene D Hayes, Ronald Flegel
Current hair testing methods that rely solely on quantification of parent drug compounds are unable to definitively distinguish between drug use and external contamination. One possible solution to this problem is to confirm the presence of unique drug metabolites that cannot be present through contamination, such as phase II glucuronide conjugates. This work demonstrates for the first time that codeine-6-glucuronide, hydromorphone-3-glucuronide, oxymorphone-3-glucuronide, morphine-3-glucuronide and morphine-6-glucuronide are present at sufficient concentrations to be quantifiable in hair of opioid users and that their concentrations generally increase as the concentrations of the corresponding parent compounds increase...
November 24, 2017: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/29182956/unintentional-mortality-associated-with-paracetamol-and-codeine-preparations-with-and-without-doxylamine-in-australia
#10
Ria E Hopkins, Malcolm Dobbin, Jennifer L Pilgrim
INTRODUCTION: Misuse of paracetamol, codeine and doxylamine combination analgesics may lead to addiction and mortality. This study aimed to (1) identify unintentional deaths in Australia associated with use of combination analgesic products containing paracetamol, codeine and doxylamine; (2) describe cases characteristics, including demographics and additional medication use; and (3) identify common factors associated with misuse and mortality of these medicines in Australia. DESIGN: This retrospective case series analysed National Coronial Information System data to identify cases of unintentional death attributable to paracetamol, codeine and doxylamine products between 2002 and 2012...
November 23, 2017: Forensic Science International
https://www.readbyqxmd.com/read/29167237/changes-in-the-dispensing-of-opioid-medications-in-canada-following-the-introduction-of-a-tamper-deterrent-formulation-of-long-acting-oxycodone-a-time-series-analysis
#11
Tara Gomes, Andrea Mastorakos, J Michael Paterson, Ingrid Sketris, Patricia Caetano, Simon Greaves, David Henry
BACKGROUND: In February 2012, a reformulated tamper-deterrent form of long-acting oxycodone, OxyNeo, was introduced in Canada. We investigated the impact of the introduction of OxyNeo on patterns of opioid prescribing. METHODS: We conducted population-based, cross-sectional analyses of opioid dispensing in Canada between 2008 and 2016. We estimated monthly community pharmacy dispensing of oral formulations of codeine, morphine, hydromorphone and oxycodone, and a transdermal formulation of fentanyl, and converted quantities to milligrams of morphine equivalents (MMEs) per 1000 population...
November 22, 2017: CMAJ Open
https://www.readbyqxmd.com/read/29165656/limited-midline-myelotomy-for-intractable-visceral-pain-surgical-techniques-and-outcomes
#12
Aditya Vedantam, Dhanalakshmi Koyyalagunta, Brian Mendoza Bruel, Patrick M Dougherty, Ashwin Viswanathan
BACKGROUND: Limited midline myelotomy targets the midline nociceptive pathway for intractable visceral pain. Multiple techniques are available for limited midline myelotomy; however, outcome data for each technique are sparse. OBJECTIVE: To review our experience with open and percutaneous approaches for limited midline myelotomy for intractable visceral pain. METHODS: Patients who underwent limited midline myelotomy for intractable visceral pain were reviewed...
November 18, 2017: Neurosurgery
https://www.readbyqxmd.com/read/29157725/nonsurgical-lumbar-radiculopathies-treated-with-ultramicronized-palmitoylethanolamide-umpea-a-series-of-100-cases
#13
Domenico Chirchiglia, Pasquale Chirchiglia, Francesco Signorelli
In this clinical/observational study we have reported the administration of Palmitoylethanolamide (PEA) in patients suffering from radicular lumbar spinal pathology, who had no indication for surgical treatment. We analyzed a series of 100 cases retrospectively, all undergoing clinical and diagnostic investigations, which had shown the presence of abnormalities of the vertebral body and intervertebral discs, mainly degenerative, such as spondyloarthrosis, spondylo-discarthrosis, disc protrusion, excluding disc herniation, which fell within surgical cases...
November 14, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/29148201/current-perspectives-on-the-role-of-tonsillectomy
#14
REVIEW
Samuel R Greig
Tonsillectomy is one of the most common paediatric surgical procedures performed in Australasia. The aim of this paper is to provide an up-to-date review of the indications for the procedure (and the evidence base for each of these indications), as well as describe the surgical technique and perioperative management and risks for a non-surgical audience. The primary indications for tonsillectomy are obstructive sleep apnoea (OSA) (where it is most commonly performed in association with adenoidectomy) and recurrent pharyngotonsillitis...
November 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/29148050/the-pharmacokinetics-of-morphine-and-codeine-in-human-plasma-and-urine-after-oral-administration-of-qiangli-pipa-syrup
#15
Bin-Bin Guo, Yu-Qiao Zhang, Sheng-Feng Wang, Jin-Song Ding, Wen-Hu Zhou
Papaveris pericarpium, a natural source of morphine and codeine, is the principal active component in many antitussive traditional Chinese medicines. We herein report the first PK study of papaveris pericarpium in human plasma and urine following oral administration of single (15, 30, 60 mL) and multiple dose (15 mL) of Qiangli Pipa Syrup (MOR 0.1 mg/mL, COD 0.028 mg/mL) by monitoring morphine and codeine using a HPLC-MS/MS method. Their Tmax and t1/2 values are independent of dosages, while the AUC0-t linearly increased with higher dosages, indicating linear PK characteristics...
November 17, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/29146621/effect-of-fda-investigation-on-opioid-prescribing-to-children-after-tonsillectomy-adenoidectomy
#16
MULTICENTER STUDY
Kao-Ping Chua, Mark G Shrime, Rena M Conti
BACKGROUND: In August 2012, the Food and Drug Administration investigated the safety of codeine use by children after tonsillectomy and/or adenoidectomy, culminating in a black box warning in February 2013. The objective of this study was to evaluate the association between the investigation and opioid prescribing to children undergoing these surgeries. METHODS: We identified 362 992 privately insured children in the 2010-2015 Truven MarketScan Commercial Claims and Encounters database who underwent tonsillectomy and/or adenoidectomy...
December 2017: Pediatrics
https://www.readbyqxmd.com/read/29134077/investigation-of-the-acid-base-behaviour-of-the-opium-alkaloid-thebaine-in-lc-esi-ms-mobile-phase-by-nmr-spectroscopy
#17
Michelle G Carlin, John R Dean, Jonathan L Bookham, Justin J B Perry
As part of a research programme to establish an analytical method for the simultaneous detection of the five major opium alkaloids in poppy seeds by liquid chromatography-electrospray ionization-mass spectrometry (LC-ESI-MS) it was discovered that the inclusion of thebaine produced two peaks for the same compound. This was in contrast to the effective simultaneous detection, by LC-ESI-MS, of morphine, codeine, papaverine and noscapine. The presence of these two peaks for thebaine was investigated using nuclear magnetic resonance spectroscopy with deuterated solvents to emulate the mobile phase conditions experienced...
October 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/29133961/triplex-quadruplex-structural-scaffold-a-new-binding-structure-of-aptamer
#18
Tao Bing, Wei Zheng, Xin Zhang, Luyao Shen, Xiangjun Liu, Fuyi Wang, Jie Cui, Zehui Cao, Dihua Shangguan
Apart from the canonical Watson-Crick duplex, nucleic acids can often form other structures, e.g. G-quadruplex and triplex. These structures give nucleic acid additional functions besides coding for genetic information. Aptamers are one type of functional nucleic acids that bind to specific targets with high selectivity and affinity by folding into special tertiary structures. Despite the fact that numerous aptamers have been reported, only a few different types of aptamer structures are identified. Here we report a novel triplex-quadruplex hybrid scaffold formed by a codeine binding aptamer (CBA)...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29127620/potential-of-the-strain-raoultella-sp-kdf8-for-removal-of-analgesics
#19
Andrea Palyzová, Jiří Zahradník, Helena Marešová, Lucie Sokolová, Eva Kyslíková, Michal Grulich, Václav Štěpánek, Tomáš Řezanka, Pavel Kyslík
The bacterial strain KDF8 capable of growth in the presence of diclofenac and codeine analgesics was obtained after chemical mutagenesis of nature isolates from polluted soils. The strain KDF8 was identified as Raoultella sp. based on its morphology, biochemical properties, and 16S rRNA gene sequence. It was deposited in the Czech Collection of Microorganisms under the number CCM 8678. A growing culture efficiently removed diclofenac (92% removal) and partially also codeine (about 30% degradation) from culture supernatants within 72 h at 28 °C...
November 11, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/29124988/extracorporeal-elimination-of-butalbital-in-acute-aspirin-butalbital-caffeine-codeine-fiorinal-with-codeine-poisoning
#20
Janelle O Poyant, Robert Albright, Jeremy Clain, Govind Pandompatam, Erin F Barreto
BACKGROUND: Butalbital is a small molecule (approximately 220 Da), with 26% protein binding, a 0.8 L/kg volume of distribution, and is eliminated nearly 80% unchanged in the urine. Although hemodialysis has been used to treat overdoses of other barbiturates, the extracorporeal clearance of butalbital is unknown. The objective of this case is to describe the use of extracorporeal therapy to augment elimination of butalbital after an overdose of aspirin 325 mg-butalbital 50 mg-caffeine 40 mg with codeine 30 mg (Fiorinal with Codeine)...
November 10, 2017: Clinical Toxicology
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