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https://www.readbyqxmd.com/read/28648913/the-effects-of-analgesics-on-central-processing-of-tonic-pain-a-cross-over-placebo-controlled-study
#1
Dina Lelic, Tine M Hansen, Esben B Mark, Anne E Olesen, Asbjørn M Drewes
INTRODUCTION: Opioids and antidepressants that inhibit serotonin and norepinephrine reuptake (SNRI) are recognized as analgesics to treat moderate to severe pain, but the central mechanisms underlying their analgesia remain unclear. This study investigated how brain activity at rest and exposed to tonic pain is modified by oxycodone (opioid) and venlafaxine (SNRI). METHODS: Twenty healthy males were included in this randomized, cross-over, double-blinded study. 61-channel electroencephalogram (EEG) was recorded before and after five days of treatment with placebo, oxycodone (10 mg extended release b...
June 22, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28646524/risk-factors-for-severe-respiratory-depression-from-prescription-opioid-overdose
#2
Lindsay M Fox, Robert S Hoffman, David Vlahov, Alex F Manini
BACKGROUND AND AIMS: Prescription opioid overdose is a leading cause of injury-related morbidity and mortality in the US. We aimed to identify characteristics associated with clinical severity in emergency department patients with prescription opioid overdose. DESIGN: This was a secondary data analysis of adult prescription opioid overdoses from a large prospective cohort of acute overdoses. We examined elements of a typical emergency department evaluation using a multivariable model to determine which characteristics were associated with clinical severity, specifically severe respiratory depression (SRD)...
June 23, 2017: Addiction
https://www.readbyqxmd.com/read/28644835/physician-assessments-of-drug-seeking-behavior-a-mixed-methods-study
#3
Michael A Fischer, John B McKinlay, Jeffrey N Katz, Eric Gerstenberger, Felicia Trachtenberg, Lisa D Marceau, Lisa C Welch
BACKGROUND: Pain complaints are common, but clinicians are increasingly concerned about overuse of opioid pain medications. This may lead patients with actual pain to be stigmatized as "drug-seeking," or attempting to obtain medications they do not require medically. We assessed whether patient requests for specific opioid pain medication would lead physicians to classify them as drug-seeking and change management decisions. METHODS AND FINDINGS: Mixed-methods analysis of interviews with 192 office-based primary care physicians after viewing video vignettes depicting patients presenting with back pain...
2017: PloS One
https://www.readbyqxmd.com/read/28643329/analgesic-plasma-concentrations-of-oxycodone-after-surgery-for-breast-cancer-which-factors-matter
#4
K Cajanus, M Neuvonen, O Koskela, M A Kaunisto, P J Neuvonen, M Niemi, E Kalso
We investigated factors affecting analgesic oxycodone concentrations after breast cancer surgery in 1,000 women. Preoperatively, we studied heat and cold pain sensitivities and anxiety scores. Postoperatively, rest and motion pain intensities were measured and intravenous oxycodone was administered until satisfactory analgesia. At this point, the mean oxycodone concentration (variation coefficient) was 33.3 ng/ml (66%), and it was 21.7 ng/ml (69%) when the patient requested oxycodone again. At both time points, the concentrations varied >100-fold between individuals...
June 23, 2017: Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28641363/a-phase-iii-randomized-controlled-study-on-the-efficacy-and-improved-bowel-function-of-prolonged-release-pr-oxycodone-naloxone-up-to-160-80-mg-daily-vs-oxycodone-pr
#5
D Dupoiron, A Stachowiak, O Loewenstein, A Ellery, W Kremers, B Bosse, M Hopp
BACKGROUND: Oxycodone/naloxone (OXN PR) is a prolonged-release formulation containing oxycodone and naloxone in a 2:1 ratio. This study aimed to evaluate the tolerability and efficacy of doses up to OXN160/80 mg PR compared with oxycodone prolonged-release formulation (OxyPR) in a randomised controlled trial. METHODS: Two hundred and forty-three patients were randomised to treatment with OXN PR (n = 123) or OxyPR (n = 120) during the 5-week double-blind study...
June 22, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28626808/attenuation-of-opioid-tolerance-by-etb-receptor-agonist-irl-1620-is-independent-of-an-accompanied-decrease-in-nerve-growth-factor-in-mice
#6
Shruti Gulati, Seema Briyal, Shantel Jones, Shaifali Bhalla, Anil Gulati
AIM: ETA receptor antagonists reverse opioid tolerance but the involvement of ETB receptors is unknown. In morphine or oxycodone tolerant mice we investigated (1) the effect of ETB receptor agonist, IRL-1620, on analgesic tolerance; (2) changes in expression of the brain ETA and ETB receptors; and (3) alterations in the brain VEGF, NGF, PI3K and notch-1 expression. MAIN METHODS: Body weight, body temperature, and tail-flick latency were assessed before and after a challenge dose of morphine or oxycodone in vehicle or IRL-1620 treated mice...
June 2017: Heliyon
https://www.readbyqxmd.com/read/28614733/impact-of-capillary-flow-hydrodynamics-on-carrier-mediated-transport-of-opioid-derivatives-at-the-blood-brain-barrier-based-on-ph-dependent-michaelis-menten-and-crone-renkin-analyses
#7
Siti R Yusof, N Joan Abbott, Alex Avdeef
Most studies of blood-brain barrier (BBB) permeability and transport are conducted at a single pH, but more detailed information can be revealed by using multiple pH values. A pH-dependent biophysical model was applied to the mechanistic analysis of published pH-dependent BBB luminal uptake data from three opioid derivatives in rat: pentazocine (Suzuki et al., 2002a, 2002b), naloxone (Suzuki et al., 2010a), and oxycodone (Okura et al., 2008). Two types of data were processed: in situ brain perfusion (ISBP) and brain uptake index (BUI)...
June 11, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28608330/opioid-analgesic-use-in-australia-and-the-netherlands-a-cross-country-comparison
#8
Francisca N Wagemaakers, Samantha A Hollingworth, Sanne Kreijkamp-Kaspers, Ernest H L Tee, Anne J Leendertse, Mieke L van Driel
Background Increasing use of opioid analgesics (OA) has been reported worldwide. Objective To compare the use of OA in two countries in order to better understand these trends. Setting Outpatient settings in Australia and The Netherlands. Method We analysed publicly available government data on outpatient OA dispensing over 15 years (2000-2014). We compared dispensing trends for specific OA and explored medical (national clinical guidelines), contextual and policy-related factors to explain differences in use between the two countries...
June 12, 2017: International Journal of Clinical Pharmacy
https://www.readbyqxmd.com/read/28600725/tolerability-safety-and-effectiveness-of-oxycodone-deterx-in-elderly-patients-%C3%A2-65%C3%A2-years-of-age-with-chronic-low-back-pain-a-randomized-controlled-trial
#9
Ernest A Kopecky, Ben Vaughn, Scott Lagasse, Melinda O'Connor
TRIAL DESIGN: This was a phase III, randomized withdrawal, double-blind, placebo-controlled, enriched enrollment, parallel-group, multicenter study intended to demonstrate the safety, tolerability, and analgesic efficacy of oxycodone DETERx(®) (Xtampza™ ER) compared with matching placebo. METHODS: This post hoc analysis was performed using data from a subpopulation of enrolled patients who were ≥65 years of age. The study enrolled male and female patients with a clinical diagnosis of moderate-to-severe chronic low back pain for a minimum of 6 months prior to screening who required around-the-clock opioid therapy...
June 10, 2017: Drugs & Aging
https://www.readbyqxmd.com/read/28594766/postdischarge-opioid-use-after-cesarean-delivery
#10
Sarah S Osmundson, Leslie A Schornack, Jennifer L Grasch, Lisa C Zuckerwise, Jessica L Young, Michael G Richardson
OBJECTIVE: To characterize postdischarge opioid use and examine factors associated with variation in opioid prescribing and consumption. METHODS: We conducted a prospective observational cohort study by recruiting all women undergoing cesarean delivery during an 8-week period, excluding those with major postoperative morbidities or chronic opioid use. Starting on postoperative day 14, women were queried weekly regarding number of opioid pills used, amount remaining, and their pain experience until they had stopped opioid medication...
June 6, 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28594762/a-shared-decision-making-intervention-to-guide-opioid-prescribing-after-cesarean-delivery
#11
Malavika Prabhu, Emily McQuaid-Hanson, Stephanie Hopp, Sara M Burns, Lisa R Leffert, Ruth Landau, Julie C Lauffenburger, Niteesh K Choudhry, Anjali Kaimal, Brian T Bateman
OBJECTIVE: To assess whether a shared decision-making intervention decreases the quantity of oxycodone tablets prescribed after cesarean delivery. TECHNIQUE: A tablet computer-based decision aid formed the basis of a shared decision-making session to guide opioid prescribing after cesarean delivery. Women first received information on typical trajectories of pain resolution and expected opioid use after cesarean delivery and then chose the number of tablets of 5 mg oxycodone they would be prescribed up to the institutional standard prescription of 40 tablets...
July 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28582697/increases-in-self-reported-fentanyl-use-among-a-population-entering-drug-treatment-the-need-for-systematic-surveillance-of-illicitly-manufactured-opioids
#12
Theodore J Cicero, Matthew S Ellis, Zachary A Kasper
BACKGROUND/PURPOSE: Recent reports indicate a sharp increase in fentanyl-related overdose deaths across the United States, much of which is likely related to the introduction of cheap, illicitly manufactured fentanyl derivatives. In this study, we sought to estimate the magnitude of illicit fentanyl use from 2012 to 2016 using a national opioid abuse surveillance system. METHODS: The study program surveyed 10,900 individuals entering substance abuse treatment for opioid use disorder, with participants asked to endorse past month 'use to get high' of fentanyl drugs, stratified by identifiable (i...
May 30, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28582659/increased-use-of-heroin-as-an-initiating-opioid-of-abuse
#13
Theodore J Cicero, Matthew S Ellis, Zachary A Kasper
INTRODUCTION: Given the relatively recent growth in access to heroin and a more permissive atmosphere surrounding its use, we hypothesized that an increasing number of persons with limited experience and tolerance to opioids would experiment with heroin as their first opioid rather than more common prescription opioid analgesics. METHODS: Individuals entering substance abuse treatment for an opioid use disorder in the period 2010-2016 (N=5885) were asked about the specific opioid they first regularly used to get high...
May 23, 2017: Addictive Behaviors
https://www.readbyqxmd.com/read/28579823/use-of-immediate-release-opioids-as-supplemental-analgesia-during-management-of-moderate-to-severe-chronic-pain-with-buprenorphine-transdermal-system
#14
Sanford Silverman, Robert B Raffa, Marc J Cataldo, Monica Kwarcinski, Steven R Ripa
BACKGROUND: The buprenorphine transdermal system (BTDS) is approved in the US for the management of chronic pain. Due to its high affinity for μ-opioid receptors with a slow dissociation profile, buprenorphine may potentially displace or prevent the binding of competing μ-opioid-receptor agonists, including immediate-release (IR) opioids, in a dose-dependent manner. Health care professionals may assume that the use of IR opioids for supplemental analgesia during BTDS therapy is not acceptable...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28579822/quantitative-sensory-testing-measures-individual-pain-responses-in-emergency-department-patients
#15
Kevin J Duffy, Katharyn L Flickinger, Jeffrey T Kristan, Melissa J Repine, Alexandro Gianforcaro, Rebecca B Hasley, Saad Feroz, Jessica M Rupp, Jumana Al-Baghli, Maria L Pacella, Brian P Suffoletto, Clifton W Callaway
BACKGROUND: Refining and individualizing treatment of acute pain in the emergency department (ED) is a high priority, given that painful complaints are the most common reasons for ED visits. Few tools exist to objectively measure pain perception in the ED setting. We speculated that variation in perception of fixed painful stimuli would explain individual variation in reported pain and response to treatment among ED patients. MATERIALS AND METHODS: In three studies, we 1) describe performance characteristics of brief quantitative sensory testing (QST) in 50 healthy volunteers, 2) test effects of 10 mg oxycodone versus placebo on QST measures in 18 healthy volunteers, and 3) measure interindividual differences in nociception and treatment responses in 198 ED patients with a painful complaint during ED treatment...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28579821/opioid-analgesics-related-pharmacokinetic-drug-interactions-from-the-perspectives-of-evidence-based-on-randomized-controlled-trials-and-clinical-risk-management
#16
REVIEW
Xiu-Qin Feng, Ling-Ling Zhu, Quan Zhou
BACKGROUND: Multimorbidity results in complex polypharmacy which may bear a risk of drug interactions. A better understanding of opioid analgesics combination therapy used for pain management could help warrant medication safety, efficacy, and economic relevance. Until now there has been no review summarizing the opioid analgesics-related pharmacokinetic drug interactions from the perspective of evidence based on randomized controlled trials (RCTs). METHOD: A literature search was performed using PubMed, MEDLINE, and the Cochrane Library, using a PRISMA flowchart...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28574956/identifying-high-alert-medications-in-a-university-hospital-by-applying-data-from-the-medication-error-reporting-system
#17
Lotta Tyynismaa, Anni Honkala, Marja Airaksinen, Kenneth Shermock, Lasse Lehtonen
OBJECTIVES: To facilitate safe use of high-alert medications, lists of medications posing higher risks for medication errors (MEs) and harmful effects have been compiled. These lists can be general or reflect clinical practices in specific settings. Less common has been to compile a hospital-specific list applying data from the organization's ME reporting system. Our objective was to demonstrate a method for compiling such a high-alert medication list in a university hospital. METHODS: Of the eighteen 136 MEs reported during 2007 to 2013, ME reports with medications coded as a contributing factor to the incident were included (n = 249)...
June 1, 2017: Journal of Patient Safety
https://www.readbyqxmd.com/read/28567699/effects-of-nalfurafine-on-the-reinforcing-thermal-antinociceptive-and-respiratory-depressant-effects-of-oxycodone-modeling-an-abuse-deterrent-opioid-analgesic-in-rats
#18
E Andrew Townsend, Jennifer E Naylor, S Stevens Negus, Shelley R Edwards, Hina N Qureshi, Hunter W McLendon, Christopher R McCurdy, Coco N Kapanda, Jussara M do Carmo, Fernanda S da Silva, John E Hall, Kenneth J Sufka, Kevin B Freeman
RATIONALE: Strategies to reduce the misuse of mu opioid agonists are critically needed. Previous work has shown that kappa opioid agonists can diminish the abuse-related effects and augment the antinociceptive effects of mu agonists. However, use of traditional kappa agonists is limited by their dysphoric side effects. OBJECTIVES: The current study examined the effects of nalfurafine, a clinically available atypical kappa agonist, on the reinforcing, thermal antinociceptive, and respiratory-depressant effects of oxycodone in male rats...
May 31, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28551445/decreasing-postoperative-narcotics-in-reconstructive-pelvic-surgery-a%C3%A2-randomized-controlled-trial
#19
Krista M L Reagan, David M O'Sullivan, Richard Gannon, Adam C Steinberg
BACKGROUND: Postoperative pain control is crucial to any successful recovery plan. Many currently used medication regimens are narcotic-focused. OBJECTIVE: The objective of our study was to evaluate the efficacy of a multimodal pain regimen after pelvic reconstructive surgery. STUDY DESIGN: The primary outcome measure was narcotic use. Secondary outcomes included pain, nausea, and constipation. Patients were randomized to either usual care postoperative treatment or multimodal pain regimen...
May 25, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28549620/the-effect-of-opioid-prescribing-guidelines-on-prescriptions-by-emergency-physicians-in-ohio
#20
Scott G Weiner, Olesya Baker, Sabrina J Poon, Ann F Rodgers, Chad Garner, Lewis S Nelson, Jeremiah D Schuur
STUDY OBJECTIVE: The objective of our study is to evaluate the association between Ohio's April 2012 emergency physician guidelines aimed at reducing inappropriate opioid prescribing and the number and type of opioid prescriptions dispensed by emergency physicians. METHODS: We used Ohio's prescription drug monitoring program data from January 1, 2010, to December 31, 2014, and included the 5 most commonly prescribed opioids (hydrocodone, oxycodone, tramadol, codeine, and hydromorphone)...
May 20, 2017: Annals of Emergency Medicine
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