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Varenicline

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https://www.readbyqxmd.com/read/28087221/varenicline-provokes-impulsive-action-by-stimulating-%C3%AE-4%C3%AE-2-nicotinic-acetylcholine-receptors-in-the-infralimbic-cortex-in-a-nicotine-exposure-status-dependent-manner
#1
Yu Ohmura, Hitomi Sasamori, Iku Tsutsui-Kimura, Takeshi Izumi, Takayuki Yoshida, Mitsuhiro Yoshioka
Higher impulsivity is a risk factor for criminal involvement and drug addiction. Because nicotine administration enhances impulsivity, the effects of stop-smoking aids stimulating nicotinic acetylcholine receptors (nAChRs) on impulsivity must be determined in different conditions. Our goals were 1) to confirm the relationship between varenicline, a stop-smoking aid and α4β2 nAChR partial agonist, and impulsivity, 2) to elucidate the mechanisms underlying the effects of varenicline, 3) to examine whether a low dose of varenicline that does not evoke impulsive action could block the stimulating effects of nicotine on impulsive action, 4) to determine whether the route of administration could modulate the effects of varenicline on impulsive action, and 5) to determine whether the effects of varenicline on impulsivity could be altered by smoking status...
January 10, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28077163/the-efficacy-of-varenicline-in-achieving-abstinence-among-waterpipe-tobacco-smokers-study-protocol-for-a-randomized-controlled-trial
#2
Raana Zahid, Omara Dogar, Sonia Mansoor, Amina Khan, Mona Kanaan, Mohammed Jawad, Jasjit S Ahluwalia, Kamran Siddiqi
BACKGROUND: Waterpipe tobacco smoking has increased among youth across the globe including in the US, and it continues as a common and traditional form of smoking tobacco in Pakistan. A range of behavioral and pharmacological therapies are available to support people in quitting cigarette smoking; however, little evidence exists for the efficacy of these therapies in achieving abstinence among waterpipe tobacco smokers. The objective of this study is to assess the efficacy of varenicline when added to behavioral support for waterpipe tobacco smoking cessation, by measuring biochemically validated continuous abstinence in waterpipe tobacco smokers...
January 11, 2017: Trials
https://www.readbyqxmd.com/read/28055135/a-combination-of-naltrexone-varenicline-retards-the-expression-of-a-genetic-predisposition-toward-high-alcohol-drinking
#3
Janice C Froehlich, Stephen M Fischer, Emily R Nicholson, Julian E Dilley, Nicholas J Filosa, Teal N Smith, Logan C Rademacher
BACKGROUND: This study examined whether naltrexone (NTX) or varenicline (VAR), alone or in combination, can retard the phenotypic expression of a genetic predisposition toward high alcohol drinking in rats selectively bred for high alcohol intake when drug treatment is initiated prior to, or concomitantly with, the onset of alcohol drinking. METHODS: Alcohol-naïve P rats were treated daily with NTX (15.0 mg/kg BW), VAR (1.0 mg/kg BW), a combination of NTX (15.0 mg/kg BW) + VAR (1...
January 5, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28048167/su-f-i-66-the-effects-of-nicotinic-agonists-on-rat-hippocampal-glutamatergic-fluctuation-by-using-proton-magnetic-resonance-spectroscopy-at-9-4t
#4
S-I Lim, K-H Song, C-H Yoo, D-C Woo, B-Y Choe
PURPOSE: Nicotine exerts its effects through the activation of nicotinic acetylcholine receptors (nAChRs). Varenicline, a smoking cessation aid, is a partial agonist acting at the α4β2 nAChRs. Although nicotine and varenicline contribute to the reward system at the same time, the influence of the substances on hippocampal neurochemical changes has not been investigated yet. We therefore studied the effects of repeated nicotine exposure and varenicline administration on hippocampus of rats by using in vivo proton magnetic resonance spectroscopy (1H MRS) at 9...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28028600/the-contribution-of-%C3%AE-4%C3%AE-2-and-non-%C3%AE-4%C3%AE-2-nicotinic-acetylcholine-receptors-to-the-discriminative-stimulus-effects-of-nicotine-and-varenicline-in-mice
#5
Fernando B de Moura, Lance R McMahon
RATIONALE: The extent to which non-α4β2 versus α4β2* nAChRs contribute to the behavioral effects of varenicline and other nAChR agonists is unclear. OBJECTIVES: The purpose of this study was to characterize the discriminative stimulus effects of varenicline and nicotine using various nAChR agonists and antagonists to elucidate possible non-α4β2 nAChR mechanisms. METHODS: Separate groups of male C57BL/6J mice were trained to discriminate varenicline (3...
December 27, 2016: Psychopharmacology
https://www.readbyqxmd.com/read/28025093/varenicline-improves-motor-and-cognitive-deficits-and-decreases-depressive-like-behaviour-in-late-stage-yac128-mice
#6
Ailsa L McGregor, Gary D'Souza, Donghyo Kim, Malcolm D Tingle
OBJECTIVE: Studies in the post mortem human brain and in genetic mouse model suggest that dysfunctional cholinergic neurotransmission, through a loss of agonist rather than receptors may be a significant contributing factor to HD pathology. If correct, pharmacological replacement may therefore be a potential treatment strategy. We have investigated whether chronic administration of the selective nicotinic partial agonist varenicline improved motor, cognitive and affective symptoms in a transgenic mouse model of Huntington's disease...
December 23, 2016: Neuropharmacology
https://www.readbyqxmd.com/read/27986524/smoking-cessation-the-urgent-need-for-increased-utilization-of-varenicline
#7
EDITORIAL
Dianna Gaballa, Joanna Drowos, Charles H Hennekens
No abstract text is available yet for this article.
December 13, 2016: American Journal of Medicine
https://www.readbyqxmd.com/read/27971376/budgetary-impact-analysis-of-reimbursement-varenicline-in-the-smoking-cessation-treatment-of-patients-with-major-depression-in-spain
#8
S Cedillo, J Rejas
No abstract text is available yet for this article.
November 2016: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
https://www.readbyqxmd.com/read/27965778/the-management-of-asthmatic-smokers
#9
REVIEW
José Miguel Chatkin, Cynthia Rocha Dullius
Asthma is still a major public health problem in most countries; new strategies to better control this disease are necessary. Such strategies must include predisposing factors. One of these factors is smoking and a significant fraction of asthmatics are smokers. However, clinical trials studying new drugs or newer therapeutic regimens for asthma generally exclude smokers. Therefore, there is a lack of specific information about the treatment of asthma in smokers. The asthmatic smoker is a special phenotype with important therapeutic and prognostic clinical implications...
2016: Asthma research and practice
https://www.readbyqxmd.com/read/27956009/maintenance-pharmacotherapy-normalizes-the-relapse-curve-in-recently-abstinent-tobacco-smokers-with-schizophrenia-and-bipolar-disorder
#10
A Eden Evins, Susanne S Hoeppner, David A Schoenfeld, Bettina B Hoeppner, Corinne Cather, Gladys N Pachas, Kristina M Cieslak, Melissa Culhane Maravic
OBJECTIVE: To compare the effect of maintenance pharmacotherapy on sustained abstinence rates between recently abstinent smokers with schizophrenia and bipolar disorder (SBD) and general population smokers without psychiatric illness. METHOD: We performed a person-level, pooled analysis of two randomized controlled trials of maintenance varenicline, conducted in adult smokers with SBD and general population smokers, controlling for severity of dependence. Smokers abstinent after 12-weeks of open varenicline treatment were randomly assigned to ≥12-weeks maintenance varenicline or identical placebo...
December 9, 2016: Schizophrenia Research
https://www.readbyqxmd.com/read/27940077/the-discriminative-stimulus-effects-of-i-v-nicotine-in-rhesus-monkeys-pharmacokinetics-and-apparent-pa2-analysis-with-dihydro-%C3%AE-erythroidine
#11
Megan J Moerke, Andy Z X Zhu, Rachel F Tyndale, Martin A Javors, Lance R McMahon
Quantitative analysis of antagonism is infrequently used to identify nAChRs mediating behavioral effects. Here, nicotine (0.032 mg/kg i.v.) was established as a discriminative stimulus in rhesus monkeys responding under a fixed ratio 5 schedule; pharmacokinetics and underlying nAChR mechanism(s) were examined. When measured up to 4 h in venous blood, the training dose resulted in the following mean pharmacokinetic parameters: nicotine Cmax = 71.7 ng/ml, t1/2 = 116 min, and clearance = 6.25 ml/min/kg; cotinine Cmax = 191 ng/ml; and 3OH-cotinine Cmax = 63 ng/ml...
December 8, 2016: Neuropharmacology
https://www.readbyqxmd.com/read/27939341/the-effects-of-varenicline-on-methamphetamine-self-administration-and-drug-primed-reinstatement-in-male-rats
#12
Steven T Pittenger, Scott T Barrett, Shinnyi Chou, Rick A Bevins
Methamphetamine (meth) addiction is a costly burden to both the individual user and society as a whole. Establishing effective pharmacotherapies to treat meth dependence is needed to help solve this health problem. The study reported herein examined the effects of varenicline, a partial α4β2 and full α7 nicotinic acetylcholine receptor agonist, on meth self-administration and reinstatement in male Sprague-Dawley rats. Following indwelling jugular catheter surgery, rats were either trained to self-administer meth or saline on a variable ratio (VR) 3 schedule of reinforcement...
December 8, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/27906858/electronic-cigarettes-as-smoking-cessation-tool-are-we-there
#13
Sohini Ghosh, M Bradley Drummond
PURPOSE OF REVIEW: Electronic cigarette (e-cigarette) use is rapidly increasing, with many users reporting trying e-cigarettes as a method to quit combustible cigarettes. This review highlights recently published studies assessing the use of e-cigarettes as a tool for cessation of combustible cigarettes. RECENT FINDINGS: When evaluating data from four randomized controlled trials and multiple cohort studies, differential association between e-cigarette use and cessation rates was seen...
November 30, 2016: Current Opinion in Pulmonary Medicine
https://www.readbyqxmd.com/read/27905641/-factors-associated-with-success-of-a-smoking-cessation-program
#14
Pedro Peña, Mónica Zagolin, Mónica Acuña, Sandra Navarrete, Pilar Bustamante, Andrea Canals
BACKGROUND: Smoking cessation therapies include counseling, psychological management and pharmacological therapy. Varenicline is the most effective and safe medication available. AIM: To study risk factors for the failure of pharmacological smoking cessation therapy with varenicline. PATIENTS AND METHODS: Retrospective analysis of 281 patients aged 45 ± 11 years (65% males) with a mean consumption of 31 ± 22 packs/year. They completed a smoking cessation program comprising psychological support and use of varenicline in a private clinic...
August 2016: Revista Médica de Chile
https://www.readbyqxmd.com/read/27893843/comparative-effectiveness-of-smoking-cessation-medications-a-national-prospective-cohort-from-taiwan
#15
Po-Yin Chang, Po-Ching Lo, Hui-Chin Chang, Kuang-Chieh Hsueh, Yi-Wen Tsai
BACKGROUND AND OBJECTIVE: Relative effectiveness of smoking cessation medications-varenicline, bupropion and nicotine replacement therapy (NRT)-remains unclear among smokers in real-world settings. Evidence in females and smokers with light/moderate nicotine dependence is particularly insufficient. This study compared the effectiveness of varenicline, bupropion or NRT gum relative to NRT patch, in achieving abstinence among recent quitters. METHODS: In a national smoking cessation program in Taiwan (2012-2015), a cohort of 11,968 participants received varenicline (n = 5,052), bupropion (n = 823), NRT gum (n = 1944) or NRT patch (n = 4,149)...
2016: PloS One
https://www.readbyqxmd.com/read/27882838/a-pragmatic-randomized-trial-comparing-telephone-based-enhanced-pharmacy-care-and-usual-care-to-support-smoking-cessation
#16
Jason Gong, Christine L Baker, Kelly H Zou, Marianna Bruno, Zhanna Jumadilova, David Lawrence, Beth Wilson, Cynthia Ewel
BACKGROUND: Smoking is the leading preventable cause of death, and tobacco control professionals continue to make progress in cessation efforts. Pharmacists can assist smokers seeking to quit by offering counseling on smoking cessation pharmacotherapies. Pragmatic randomized trials are useful for investigating practical questions about an intervention's risks, benefits, and costs in routine clinical practice. OBJECTIVE: To evaluate an enhanced pharmacy care (EPC) program involving personalized pharmacist-provided telephone counseling for supporting prescription smoking cessation medications compared with usual care (UC)...
December 2016: Journal of Managed Care & Specialty Pharmacy
https://www.readbyqxmd.com/read/27863344/selection-criteria-limit-generalizability-of-smoking-pharmacotherapy-studies-differentially-across-clinical-trials-and-laboratory-studies-a-systematic-review-on-varenicline
#17
REVIEW
Courtney A Motschman, Julie C Gass, Jennifer M Wray, Lisa J Germeroth, Nicolas J Schlienz, Diana A Munoz, Faith E Moore, Jessica D Rhodes, Larry W Hawk, Stephen T Tiffany
BACKGROUND: The selection criteria used in clinical trials for smoking cessation and in laboratory studies that seek to understand mechanisms responsible for treatment outcomes may limit their generalizability to one another and to the general population. METHODS: We reviewed studies on varenicline versus placebo and compared eligibility criteria and participant characteristics of clinical trials (N=23) and laboratory studies (N=22) across study type and to nationally representative survey data on adult, daily USA smokers (2014 National Health Interview Survey; 2014 National Survey on Drug Use and Health)...
December 1, 2016: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/27852796/combination-varenicline-and-lorcaserin-for-tobacco-dependence-treatment-and-weight-gain-prevention-in-overweight-and-obese-smokers-a-pilot-study
#18
Ryan T Hurt, Ivana T Croghan, Darrell R Schroeder, J Taylor Hays, Doo-Sup Choi, Jon O Ebbert
INTRODUCTION: Post-cessation weight gain (PCWG) is a major barrier to maintaining abstinence, especially in weight-concerned smokers. Varenicline is the most effective medication for smoking cessation but has minimal impact on PCWG. Lorcaserin is an FDA-approved medication for weight management in overweight or obese patients which also provides a noticeable benefit in treating drug dependence. We hypothesized that combining varenicline with lorcaserin may help prevent PCWG. We conducted an open-label, single arm, Phase II clinical pilot study to obtain preliminary data on the safety and effectiveness of combination varenicline and lorcaserin in preventing PCWG in overweight and obese smokers...
November 16, 2016: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/27851994/pregnancy-outcomes-after-maternal-varenicline-use-analysis-of-surveillance-data-collected-by-the-european-network-of-teratology-information-services
#19
J L Richardson, S Stephens, L M Yates, O Diav-Citrin, J Arnon, D Beghin, A Kayser, D Kennedy, D Cupitt, B Te Winkel, M Peltonen, Y C Kaplan, S H L Thomas
: Varenicline is a smoking cessation aid for which limited data exist concerning safety during human pregnancy. This multicentre prospective observational comparative cohort study was undertaken using surveillance data collected by the European Network of Teratology Information Services. The study sample consisted of 89 varenicline exposed pregnancies and two matched comparator groups; 267 non-teratogen exposed (NTE) controls and 78 exposed to nicotine replacement therapy or bupropion (NRT/B) for smoking cessation...
November 13, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27847973/metabotropic-glutamate-receptor-5-as-a-potential-target-for-smoking-cessation
#20
REVIEW
Cristiano Chiamulera, Claudio Marcello Marzo, David J K Balfour
RATIONALE: Most habitual smokers find it difficult to quit smoking because they are dependent upon the nicotine present in tobacco smoke. Tobacco dependence is commonly treated pharmacologically using nicotine replacement therapy or drugs, such as varenicline, that target the nicotinic receptor. Relapse rates, however, remain high, and there remains a need to develop novel non-nicotinic pharmacotherapies for the dependence that are more effective than existing treatments. OBJECTIVE: The purpose of this paper is to review the evidence from preclinical and clinical studies that drugs that antagonise the metabotropic glutamate receptor 5 (mGluR5) in the brain are likely to be efficacious as treatments for tobacco dependence...
November 16, 2016: Psychopharmacology
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