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Podlasek A, Claire R, Campbell KA, Orton S, Thomson R, Coleman T. Systematic review and meta-analysis investigating nicotine, cotinine and carbon monoxide exposures in people who both smoke and use nicotine replacement therapy. Addiction 2023; 118:2076-2092. [PMID: 37394704 DOI: 10.1111/add.16279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 05/16/2023] [Indexed: 07/04/2023]
Abstract
AIMS To determine effects of concurrent smoking and nicotine replacement therapy (NRT) use on reported heaviness of smoking, nicotine (cotinine) body fluid and exhaled air carbon monoxide (CO) concentrations. METHODS Systematic review and meta-analysis of RCTs, which test interventions permitting concurrent NRT use and smoking and comparing, within participants, outcomes when smoking with those when smoking and using NRT concurrently. Measurements included reported number of cigarettes smoked per day (CPD), body fluid cotinine and expired air CO concentrations. RESULTS Twenty-nine studies were included in the review. Meta-analysis of nine showed that, compared with when solely smoking, fewer cigarettes were smoked daily when NRT was used (mean difference during concurrent smoking and NRT use, -2.06 CPD [95% CI = -3.06 to -1.07, P < 0.0001]). Meta-analysis of seven studies revealed a non-significant reduction in exhaled CO during concurrent smoking and NRT use (mean difference, -0.58 ppm [95% CI = -2.18 to 1.03, P = 0.48]), but in the three studies that tested NRT used in the lead-up to quitting (i.e. as preloading), a similar reduction in exhaled CO was statistically significant (mean difference, -2.54 ppm CO [95% CI = -4.14 to -0.95, P = 0.002]). Eleven studies reported cotinine concentrations, but meta-analysis was not possible because of data reporting heterogeneity; of these, seven reported lower cotinine concentrations with concurrent NRT use and smoking, four reported no differences, and none reported higher concentrations. CONCLUSIONS People who smoke and also use nicotine replacement therapy report smoking less heavily than people who solely smoke. When nicotine replacement therapy is used in the lead-up to quitting (preloading), this reported smoking reduction has been biochemically confirmed. There is no evidence that concurrent smoking and nicotine replacement therapy use result in greater nicotine exposure than solely smoking.
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Affiliation(s)
- Anna Podlasek
- Centre for Academic Primary Care, University of Nottingham, Nottingham, Nottinghamshire, UK
- Tayside Innovation and MedTech Ecosystem (TIME), University of Dundee, Dundee, Scotland, UK
| | - Ravinder Claire
- National Institute for Health and Care Excellence, London, London City, UK
| | - Katarzyna A Campbell
- Centre for Academic Primary Care, University of Nottingham, Nottingham, Nottinghamshire, UK
| | - Sophie Orton
- Centre for Academic Primary Care, University of Nottingham, Nottingham, Nottinghamshire, UK
| | - Ross Thomson
- Centre for Academic Primary Care, University of Nottingham, Nottingham, Nottinghamshire, UK
| | - Tim Coleman
- Centre for Academic Primary Care, University of Nottingham, Nottingham, Nottinghamshire, UK
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Wong WF, Ang KP, Sethi G, Looi CY. Recent Advancement of Medical Patch for Transdermal Drug Delivery. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:medicina59040778. [PMID: 37109736 PMCID: PMC10142343 DOI: 10.3390/medicina59040778] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/31/2023] [Accepted: 04/05/2023] [Indexed: 04/29/2023]
Abstract
Transdermal patches are a non-invasive method of drug administration. It is an adhesive patch designed to deliver a specific dose of medication through the skin and into the bloodstream throughout the body. Transdermal drug delivery has several advantages over other routes of administration, for instance, it is less invasive, patient-friendly, and has the ability to bypass first-pass metabolism and the destructive acidic environment of the stomach that occurs upon the oral ingestion of drugs. For decades, transdermal patches have attracted attention and were used to deliver drugs such as nicotine, fentanyl, nitroglycerin, and clonidine to treat various diseases or conditions. Recently, this method is also being explored as a means of delivering biologics in various applications. Here, we review the existing literatures on the design and usage of medical patches in transdermal drug delivery, with a focus on the recent advances in innovation and technology that led to the emergence of smart, dissolvable/biodegradable, and high-loading/release, as well as 3D-printed patches.
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Affiliation(s)
- Won Fen Wong
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Kuan Ping Ang
- Department of Medical Microbiology, University Malaya Medical Center, Kuala Lumpur 59100, Malaysia
| | - Gautam Sethi
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore
| | - Chung Yeng Looi
- School of Biosciences, Faculty of Health & Medical Sciences, Taylor's University, Subang Jaya 47500, Malaysia
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Thomas KH, Dalili MN, López-López JA, Keeney E, Phillippo D, Munafò MR, Stevenson M, Caldwell DM, Welton NJ. Smoking cessation medicines and e-cigarettes: a systematic review, network meta-analysis and cost-effectiveness analysis. Health Technol Assess 2021; 25:1-224. [PMID: 34668482 DOI: 10.3310/hta25590] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Cigarette smoking is one of the leading causes of early death. Varenicline [Champix (UK), Pfizer Europe MA EEIG, Brussels, Belgium; or Chantix (USA), Pfizer Inc., Mission, KS, USA], bupropion (Zyban; GlaxoSmithKline, Brentford, UK) and nicotine replacement therapy are licensed aids for quitting smoking in the UK. Although not licensed, e-cigarettes may also be used in English smoking cessation services. Concerns have been raised about the safety of these medicines and e-cigarettes. OBJECTIVES To determine the clinical effectiveness, safety and cost-effectiveness of smoking cessation medicines and e-cigarettes. DESIGN Systematic reviews, network meta-analyses and cost-effectiveness analysis informed by the network meta-analysis results. SETTING Primary care practices, hospitals, clinics, universities, workplaces, nursing or residential homes. PARTICIPANTS Smokers aged ≥ 18 years of all ethnicities using UK-licensed smoking cessation therapies and/or e-cigarettes. INTERVENTIONS Varenicline, bupropion and nicotine replacement therapy as monotherapies and in combination treatments at standard, low or high dose, combination nicotine replacement therapy and e-cigarette monotherapies. MAIN OUTCOME MEASURES Effectiveness - continuous or sustained abstinence. Safety - serious adverse events, major adverse cardiovascular events and major adverse neuropsychiatric events. DATA SOURCES Ten databases, reference lists of relevant research articles and previous reviews. Searches were performed from inception until 16 March 2017 and updated on 19 February 2019. REVIEW METHODS Three reviewers screened the search results. Data were extracted and risk of bias was assessed by one reviewer and checked by the other reviewers. Network meta-analyses were conducted for effectiveness and safety outcomes. Cost-effectiveness was evaluated using an amended version of the Benefits of Smoking Cessation on Outcomes model. RESULTS Most monotherapies and combination treatments were more effective than placebo at achieving sustained abstinence. Varenicline standard plus nicotine replacement therapy standard (odds ratio 5.75, 95% credible interval 2.27 to 14.90) was ranked first for sustained abstinence, followed by e-cigarette low (odds ratio 3.22, 95% credible interval 0.97 to 12.60), although these estimates have high uncertainty. We found effect modification for counselling and dependence, with a higher proportion of smokers who received counselling achieving sustained abstinence than those who did not receive counselling, and higher odds of sustained abstinence among participants with higher average dependence scores. We found that bupropion standard increased odds of serious adverse events compared with placebo (odds ratio 1.27, 95% credible interval 1.04 to 1.58). There were no differences between interventions in terms of major adverse cardiovascular events. There was evidence of increased odds of major adverse neuropsychiatric events for smokers randomised to varenicline standard compared with those randomised to bupropion standard (odds ratio 1.43, 95% credible interval 1.02 to 2.09). There was a high level of uncertainty about the most cost-effective intervention, although all were cost-effective compared with nicotine replacement therapy low at the £20,000 per quality-adjusted life-year threshold. E-cigarette low appeared to be most cost-effective in the base case, followed by varenicline standard plus nicotine replacement therapy standard. When the impact of major adverse neuropsychiatric events was excluded, varenicline standard plus nicotine replacement therapy standard was most cost-effective, followed by varenicline low plus nicotine replacement therapy standard. When limited to licensed interventions in the UK, nicotine replacement therapy standard was most cost-effective, followed by varenicline standard. LIMITATIONS Comparisons between active interventions were informed almost exclusively by indirect evidence. Findings were imprecise because of the small numbers of adverse events identified. CONCLUSIONS Combined therapies of medicines are among the most clinically effective, safe and cost-effective treatment options for smokers. Although the combined therapy of nicotine replacement therapy and varenicline at standard doses was the most effective treatment, this is currently unlicensed for use in the UK. FUTURE WORK Researchers should examine the use of these treatments alongside counselling and continue investigating the long-term effectiveness and safety of e-cigarettes for smoking cessation compared with active interventions such as nicotine replacement therapy. STUDY REGISTRATION This study is registered as PROSPERO CRD42016041302. FUNDING This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 25, No. 59. See the NIHR Journals Library website for further project information.
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Affiliation(s)
- Kyla H Thomas
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - Michael N Dalili
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - José A López-López
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - Edna Keeney
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - David Phillippo
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - Marcus R Munafò
- Faculty of Life Sciences, School of Psychological Science, University of Bristol, Bristol, UK.,MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK.,UK Centre for Tobacco and Alcohol Studies, University of Bristol, Bristol, UK
| | - Matt Stevenson
- Health Economics and Decision Science, School of Health and Related Research, University of Sheffield, Sheffield, UK
| | - Deborah M Caldwell
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - Nicky J Welton
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
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Karelitz JL, McClure EA, Wolford-Clevenger C, Pacek LR, Cropsey KL. Cessation classification likelihood increases with higher expired-air carbon monoxide cutoffs: a meta-analysis. Drug Alcohol Depend 2021; 221:108570. [PMID: 33592559 PMCID: PMC8026538 DOI: 10.1016/j.drugalcdep.2021.108570] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/05/2021] [Accepted: 01/10/2021] [Indexed: 01/20/2023]
Abstract
BACKGROUND Expired-air carbon monoxide (CO) is commonly used to biochemically verify smoking status. The CO cutoff and CO monitor brand may affect the probability of classifying smokers as abstinent, thus influencing conclusions about the efficacy of cessation trials. No systematic reviews have tested this hypothesis. Therefore, we performed a meta-analysis examining whether the likelihood of smoking cessation classification varied due to CO cutoff and monitor brand. METHODS Eligible studies (k = 122) longitudinally assessed CO-verified cessation in adult smokers in randomized trials. Primary meta-regressions separately assessed differences in quit classification likelihood due to continuous and categorical CO cutoffs (Low, 3-4 parts per million [ppm]; [SRNT] Recommended, 5-6 ppm; Moderate, 7-8 ppm; and High, 9-10 ppm); exploratory analyses compared likelihood outcomes between monitor brands: Bedfont and Vitalograph. RESULTS The likelihood of quit classification increased 18% with each 1 ppm increase above the lowest cutoff (3 ppm). Odds of classification as quit significantly increased between each cutoff category and High: 261% increase from Low; 162% increase from Recommended; and 150% increase from Moderate. There were no differences in cessation classification between monitor brands. CONCLUSIONS As expected, higher CO cutoffs were associated with greater likelihood of cessation classification. The lack of CO monitor brand differences may have been due to model-level variance not able to be followed up in the present dataset. Researchers are advised to report outcomes using a range of cutoffs-including the recommended range (5-6 ppm)-and the CO monitor brand/model used. Using higher CO cutoffs significantly increases likelihood of quit classification, possibly artificially elevating treatment strategies.
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Affiliation(s)
- Joshua L Karelitz
- Division of Cancer Control and Population Sciences, UPMC Hillman Cancer Center, University of Pittsburgh, 5150 Centre Ave, Suite 4C, Pittsburgh, PA, 15232, USA; Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, 5150 Centre Ave, Suite 4C, Pittsburgh, PA, 15232, USA.
| | - Erin A McClure
- Department of Psychiatry and Behavioral Sciences, College of Medicine, Medical University of South Carolina, 67 President St, MSC 861, Charleston, SC, 29425, USA; Hollings Cancer Center, Medical University of South Carolina, 67 President St, MSC 861, Charleston, SC, 29425, USA
| | - Caitlin Wolford-Clevenger
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, 1670 University Blvd Birmingham, AL, 35233, USA
| | - Lauren R Pacek
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, 2068 Erwin Road, Room 3038, Durham, NC, 27705, USA
| | - Karen L Cropsey
- Department of Psychiatry and Behavioral Neurobiology, University of Alabama at Birmingham, 1670 University Blvd Birmingham, AL, 35233, USA
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Kagabo R, Gordon AJ, Okuyemi K. Smoking cessation in inpatient psychiatry treatment facilities: A review. Addict Behav Rep 2020; 11:100255. [PMID: 32467844 PMCID: PMC7244912 DOI: 10.1016/j.abrep.2020.100255] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 01/06/2020] [Accepted: 01/21/2020] [Indexed: 12/02/2022] Open
Abstract
Smoking rates are high among people with psychiatric illness. Smoking cessation interventions are rarely available in inpatient psychiatry settings. Smokers with psychiatric illness are just as interested in quitting smoking.
Background Tobacco-related diseases are a leading cause of death among individuals with severe mental illness (SMI), yet interventions to address tobacco cessation are rare in inpatient settings where persons with SMI are hospitalized. While cigarette smoking rates have declined in the general population, they remain high in persons with SMI. Inpatient settings would be a prime location to intervene on tobacco consumption among persons with SMI. The objective of this review was to examine evidence of smoking cessation interventions in psychiatric inpatient facilities. Method Using narrative overview guidelines, we searched PubMed, PsycINFO, and CINAHL for smoking cessation RCT studies published between 1950 and 2018. Studies included had to have at least started in inpatient psychiatry settings. Examples of search terms included: smoking cessation in inpatient psychiatry, smoking cessation in inpatient mental health treatment facilities, and smoking cessation and mental health. Results Following the inclusion criteria, eight RCT studies were reviewed. One study was among adolescent psychiatric inpatient smokers ages 13–17, and 7 were among adult psychiatric inpatients with mean age 41 years. Treatment periods lasting 8 to 12 weeks started in inpatient settings and continued post discharge. A combination of behavioral and pharmacological interventions were used. Pharmacological interventions were nicotine replacement therapies, and at least one study used varenicline. At baseline, participants smoked an average of 18.1 cigarettes per day. Conclusion Smoking cessation in inpatient psychiatry settings is rare or delayed. There is a need for more tailored treatments among this population to help them quit smoking.
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Affiliation(s)
- Robert Kagabo
- Department of Family and Preventive Medicine, University of Utah School of Medicine, Salt Lake City, UT, United States
- Corresponding author at: 375 Chipeta Way Ste. A, Salt Lake City, UT 84108, United States.
| | - Adam J. Gordon
- Program for Addiction Research, Clinical Care, Knowledge and Advocacy (PARCKA), Division of Epidemiology, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, UT, United States
- Informatics, Decision-Enhancement, and Analytic Sciences (IDEAS) Center, VA Salt Lake City Health Care System, Salt Lake City, UT, United States
| | - Kola Okuyemi
- Department of Family and Preventive Medicine, University of Utah School of Medicine, Salt Lake City, UT, United States
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Pearsall R, Smith DJ, Geddes JR. Pharmacological and behavioural interventions to promote smoking cessation in adults with schizophrenia and bipolar disorders: a systematic review and meta-analysis of randomised trials. BMJ Open 2019; 9:e027389. [PMID: 31784428 PMCID: PMC6924825 DOI: 10.1136/bmjopen-2018-027389] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 05/23/2019] [Accepted: 06/03/2019] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE Smoking in people with serious mental illness is a major public health problem and contributes to significant levels of morbidity and mortality. The aim of the review was to systematically examine the efficacy of methods used to aid smoking cessation in people with serious mental illness. METHOD A systematic review and meta-analysis of randomised controlled trials to compare the effectiveness and safety of pharmacological and behavioural programmes for smoking cessation in people with serious mental illness. Electronic databases were searched for trials to July 2018. We used the Cochrane Collaboration's tool for assessing the risk of bias. RESULTS Twenty-eight randomised controlled trials were identified. Varenicline increased the likelihood of smoking cessation at both 3 months (risk ratio (RR) 3.56, 95% CI 1.82 to 6.96, p=0.0002) and at 6 months (RR 3.69, 95% CI 1.08 to 12.60, p=0.04). Bupropion was effective at 3 months (RR 3.96, 95% CI 1.86 to 8.40, p=0.0003), especially at a dose of 300 mg/day, but there was no evidence of effect at 6 months (RR 2.22, 95% CI 0.52 to 9.47, p=0.28). In one small study, nicotine therapy proved effective at increasing smoking cessation up to a period of 3 months. Bupropion used in conjunction with nicotine replacement therapy showed more effect than single use. Behavioural and bespoke interventions showed little overall benefit. Side effects were found to be low. CONCLUSION The new information of this review was the effectiveness of varenicline for smoking cessation at both 3 and 6 months and the lack of evidence to support the use of both bupropion and nicotine products for sustained abstinence longer than 3 months. Overall, the review found relatively few studies in this population.
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Affiliation(s)
- Robert Pearsall
- Department of Psychiatry, Monklands Hospital, Airdrie, UK
- Institute of Health and Wellbeing, University of Glasgow, Glasgow, UK
| | - Daniel J Smith
- Institute of Health and Wellbeing, University of Glasgow, Glasgow, UK
| | - John R Geddes
- Department of Psychiatry, University of Oxford, Oxford, UK
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Lindson N, Klemperer E, Hong B, Ordóñez‐Mena JM, Aveyard P. Smoking reduction interventions for smoking cessation. Cochrane Database Syst Rev 2019; 9:CD013183. [PMID: 31565800 PMCID: PMC6953262 DOI: 10.1002/14651858.cd013183.pub2] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
BACKGROUND The standard way most people are advised to stop smoking is by quitting abruptly on a designated quit day. However, many people who smoke have tried to quit many times and may like to try an alternative method. Reducing smoking behaviour before quitting could be an alternative approach to cessation. However, before this method can be recommended it is important to ensure that abrupt quitting is not more effective than reducing to quit, and to determine whether there are ways to optimise reduction methods to increase the chances of cessation. OBJECTIVES To assess the effect of reduction-to-quit interventions on long-term smoking cessation. SEARCH METHODS We searched the Cochrane Tobacco Addiction Group Specialised Register, MEDLINE, Embase and PsycINFO for studies, using the terms: cold turkey, schedul*, cut* down, cut-down, gradual*, abrupt*, fading, reduc*, taper*, controlled smoking and smoking reduction. We also searched trial registries to identify unpublished studies. Date of the most recent search: 29 October 2018. SELECTION CRITERIA Randomised controlled trials in which people who smoked were advised to reduce their smoking consumption before quitting smoking altogether in at least one trial arm. This advice could be delivered using self-help materials or behavioural support, and provided alongside smoking cessation pharmacotherapies or not. We excluded trials that did not assess cessation as an outcome, with follow-up of less than six months, where participants spontaneously reduced without being advised to do so, where the goal of reduction was not to quit altogether, or where participants were advised to switch to cigarettes with lower nicotine levels without reducing the amount of cigarettes smoked or the length of time spent smoking. We also excluded trials carried out in pregnant women. DATA COLLECTION AND ANALYSIS We followed standard Cochrane methods. Smoking cessation was measured after at least six months, using the most rigorous definition available, on an intention-to-treat basis. We calculated risk ratios (RRs) and 95% confidence intervals (CIs) for smoking cessation for each study, where possible. We grouped eligible studies according to the type of comparison (no smoking cessation treatment, abrupt quitting interventions, and other reduction-to-quit interventions) and carried out meta-analyses where appropriate, using a Mantel-Haenszel random-effects model. We also extracted data on quit attempts, pre-quit smoking reduction, adverse events (AEs), serious adverse events (SAEs) and nicotine withdrawal symptoms, and meta-analysed these where sufficient data were available. MAIN RESULTS We identified 51 trials with 22,509 participants. Most recruited adults from the community using media or local advertising. People enrolled in the studies typically smoked an average of 23 cigarettes a day. We judged 18 of the studies to be at high risk of bias, but restricting the analysis only to the five studies at low or to the 28 studies at unclear risk of bias did not significantly alter results.We identified very low-certainty evidence, limited by risk of bias, inconsistency and imprecision, comparing the effect of reduction-to-quit interventions with no treatment on cessation rates (RR 1.74, 95% CI 0.90 to 3.38; I2 = 45%; 6 studies, 1599 participants). However, when comparing reduction-to-quit interventions with abrupt quitting (standard care) we found evidence that neither approach resulted in superior quit rates (RR 1. 01, 95% CI 0.87 to 1.17; I2 = 29%; 22 studies, 9219 participants). We judged this estimate to be of moderate certainty, due to imprecision. Subgroup analysis provided some evidence (P = 0.01, I2 = 77%) that reduction-to-quit interventions may result in more favourable quit rates than abrupt quitting if varenicline is used as a reduction aid. Our analysis comparing reduction using pharmacotherapy with reduction alone found low-certainty evidence, limited by inconsistency and imprecision, that reduction aided by pharmacotherapy resulted in higher quit rates (RR 1. 68, 95% CI 1.09 to 2.58; I2 = 78%; 11 studies, 8636 participants). However, a significant subgroup analysis (P < 0.001, I2 = 80% for subgroup differences) suggests that this may only be true when fast-acting NRT or varenicline are used (both moderate-certainty evidence) and not when nicotine patch, combination NRT or bupropion are used as an aid (all low- or very low-quality evidence). More evidence is likely to change the interpretation of the latter effects.Although there was some evidence from within-study comparisons that behavioural support for reduction to quit resulted in higher quit rates than self-help resources alone, the relative efficacy of various other characteristics of reduction-to-quit interventions investigated through within- and between-study comparisons did not provide any evidence that they enhanced the success of reduction-to-quit interventions. Pre-quit AEs, SAEs and nicotine withdrawal symptoms were measured variably and infrequently across studies. There was some evidence that AEs occurred more frequently in studies that compared reduction using pharmacotherapy versus no pharmacotherapy; however, the AEs reported were mild and usual symptoms associated with NRT use. There was no clear evidence that the number of people reporting SAEs, or changes in withdrawal symptoms, differed between trial arms. AUTHORS' CONCLUSIONS There is moderate-certainty evidence that neither reduction-to-quit nor abrupt quitting interventions result in superior long-term quit rates when compared with one another. Evidence comparing the efficacy of reduction-to-quit interventions with no treatment was inconclusive and of low certainty. There is also low-certainty evidence to suggest that reduction-to-quit interventions may be more effective when pharmacotherapy is used as an aid, particularly fast-acting NRT or varenicline (moderate-certainty evidence). Evidence for any adverse effects of reduction-to-quit interventions was sparse, but available data suggested no excess of pre-quit SAEs or withdrawal symptoms. We downgraded the evidence across comparisons due to risk of bias, inconsistency and imprecision. Future research should aim to match any additional components of multicomponent reduction-to-quit interventions across study arms, so that the effect of reduction can be isolated. In particular, well-conducted, adequately-powered studies should focus on investigating the most effective features of reduction-to-quit interventions to maximise cessation rates.
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Affiliation(s)
- Nicola Lindson
- University of OxfordNuffield Department of Primary Care Health SciencesRadcliffe Observatory QuarterWoodstock RoadOxfordOxfordshireUKOX2 6GG
| | - Elias Klemperer
- University of VermontDepartments of Psychological Sciences & Psychiatry1 S Prospect Street, Mail Stop 482, OH4BurlingtonVTUSA05405
| | - Bosun Hong
- Birmingham Dental HospitalOral Surgery Department5 Mill Pool WayBirminghamUKB5 7EG
| | - José M Ordóñez‐Mena
- University of OxfordNuffield Department of Primary Care Health SciencesRadcliffe Observatory QuarterWoodstock RoadOxfordOxfordshireUKOX2 6GG
| | - Paul Aveyard
- University of OxfordNuffield Department of Primary Care Health SciencesRadcliffe Observatory QuarterWoodstock RoadOxfordOxfordshireUKOX2 6GG
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Underner M, Perriot J, Brousse G, de Chazeron I, Schmitt A, Peiffer G, Harika-Germaneau G, Jaafari N. Arrêt et réduction du tabac chez le patient souffrant de schizophrénie. L'ENCEPHALE 2019; 45:345-356. [PMID: 31153585 DOI: 10.1016/j.encep.2019.04.067] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 04/18/2019] [Accepted: 04/22/2019] [Indexed: 02/08/2023]
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Scott JG, Jhetam S, Chen R, Daglish M. Should psychiatrists support the availability of nicotine e-cigarettes in Australia? Australas Psychiatry 2019; 27:392-395. [PMID: 31246116 DOI: 10.1177/1039856219859271] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVE To examine the position statement of the Royal Australian and New Zealand College of Psychiatrists (RANZCP) regarding the availability of electronic cigarettes in Australia. CONCLUSION There is limited evidence supporting the efficacy of nicotine e-cigarettes as an effective tobacco harm-reduction or cessation strategy for people with mental illness. The recommendations to increase their availability under regulation must be balanced with the physical and mental health risks of vapour inhalation and nicotine use, particularly for youth. Future recommendations by the RANZCP in relation to e-cigarettes must consider both the available evidence for harm reduction and the potential risks associated with youth e-cigarette use.
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Affiliation(s)
- James G Scott
- Faculty of Medicine, The University of Queensland, Herston, QLD, and; Metro North Mental Health, Royal Brisbane and Women's Hospital, Herston, Brisbane, QLD, and; Queensland Centre for Mental Health Research, Wacol, Brisbane, QLD, Australia
| | - Sarah Jhetam
- Faculty of Science, The University of Queensland, St Lucia, QLD, Australia
| | - Renee Chen
- Metro North Mental Health, Royal Brisbane and Women's Hospital, Herston, Brisbane, QLD, Australia
| | - Mark Daglish
- Faculty of Medicine, The University of Queensland, Herston, QLD, and; Metro North Mental Health, Royal Brisbane and Women's Hospital, Herston, Brisbane, QLD, Australia
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10
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Shawen AE, Drayton SJ. Review of pharmacotherapy for smoking cessation in patients with schizophrenia. Ment Health Clin 2018; 8:78-85. [PMID: 29955550 PMCID: PMC6007740 DOI: 10.9740/mhc.2018.03.078] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Smoking cessation is a chronic issue surrounding individuals with schizophrenia. It is estimated that up to 90% of patients diagnosed with schizophrenia smoke cigarettes. The purpose of this article is to provide a nonsystematic review of the efficacy of smoking cessation interventions as well as to explore the potential neuropsychiatric adverse effects of these agents in patients with schizophrenia. Eighteen studies were found and included in the review. Overall, nicotine replacement therapy, bupropion, and varenicline have all proven their effectiveness at either promoting smoking abstinence or a significant reduction in cigarette use.
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Affiliation(s)
- Avery E Shawen
- Student, Medical University of South Carolina College of Pharmacy, Charleston, South Carolina,
| | - Shannon J Drayton
- Associate Professor, Medical University of South Carolina College of Pharmacy, Charleston, South Carolina
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11
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Smoking cessation in severe mental ill health: what works? an updated systematic review and meta-analysis. BMC Psychiatry 2017; 17:252. [PMID: 28705244 PMCID: PMC5513129 DOI: 10.1186/s12888-017-1419-7] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 07/04/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND People with severe mental ill health are more likely to smoke than those in the general population. It is therefore important that effective smoking cessation strategies are used to help people with severe mental ill health to stop smoking. This study aims to assess the effectiveness and cost -effectiveness of smoking cessation and reduction strategies in adults with severe mental ill health in both inpatient and outpatient settings. METHODS This is an update of a previous systematic review. Electronic databases were searched during September 2016 for randomised controlled trials comparing smoking cessation interventions to each other, usual care, or placebo. Data was extracted on biochemically-verified, self-reported smoking cessation (primary outcome), as well as on smoking reduction, body weight, psychiatric symptom, and adverse events (secondary outcomes). RESULTS We included 26 trials of pharmacological and/or behavioural interventions. Eight trials comparing bupropion to placebo were pooled showing that bupropion improved quit rates significantly in the medium and long term but not the short term (short term RR = 6.42 95% CI 0.82-50.07; medium term RR = 2.93 95% CI 1.61-5.34; long term RR = 3.04 95% CI 1.10-8.42). Five trials comparing varenicline to placebo showed that that the addition of varenicline improved quit rates significantly in the medium term (RR = 4.13 95% CI 1.36-12.53). The results from five trials of specialised smoking cessation programmes were pooled and showed no evidence of benefit in the medium (RR = 1.32 95% CI 0.85-2.06) or long term (RR = 1.33 95% CI 0.85-2.08). There was insufficient data to allowing pooling for all time points for varenicline and trials of specialist smoking cessation programmes. Trials suggest few adverse events although safety data were not always reported. Only one pilot study reported cost effectiveness data. CONCLUSIONS Bupropion and varenicline, which have been shown to be effective in the general population, also work for people with severe mental ill health and their use in patients with stable psychiatric conditions. Despite good evidence for the effectiveness of smoking cessation interventions for people with severe mental ill health, the percentage of people with severe mental ill health who smoke remains higher than that for the general population.
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Lindson‐Hawley N, Hartmann‐Boyce J, Fanshawe TR, Begh R, Farley A, Lancaster T. Interventions to reduce harm from continued tobacco use. Cochrane Database Syst Rev 2016; 10:CD005231. [PMID: 27734465 PMCID: PMC6463938 DOI: 10.1002/14651858.cd005231.pub3] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Although smoking cessation is currently the only guaranteed way to reduce the harm caused by tobacco smoking, a reasonable secondary tobacco control approach may be to try and reduce the harm from continued tobacco use amongst smokers unable or unwilling to quit. Possible approaches to reduce the exposure to toxins from smoking include reducing the amount of tobacco used, and using less toxic products, such as pharmaceutical, nicotine and potential reduced-exposure tobacco products (PREPs), as an alternative to cigarettes. OBJECTIVES To assess the effects of interventions intended to reduce the harm to health of continued tobacco use, we considered the following specific questions: do interventions intended to reduce harm have an effect on long-term health status?; do they lead to a reduction in the number of cigarettes smoked?; do they have an effect on smoking abstinence?; do they have an effect on biomarkers of tobacco exposure?; and do they have an effect on biomarkers of damage caused by tobacco? SEARCH METHODS We searched the Cochrane Tobacco Addiction Group Trials Register (CRS) on the 21st October 2015, using free-text and MeSH terms for harm reduction, smoking reduction and cigarette reduction. SELECTION CRITERIA Randomized or quasi-randomized controlled trials of interventions to reduce the amount smoked, or to reduce harm from smoking by means other than cessation. We include studies carried out in smokers with no immediate desire to quit all tobacco use. Primary outcomes were change in cigarette consumption, smoking cessation and any markers of damage or benefit to health, measured at least six months from the start of the intervention. DATA COLLECTION AND ANALYSIS We assessed study eligibility for inclusion using standard Cochrane methods. We pooled trials with similar interventions and outcomes (> 50% reduction in cigarettes a day (CPD) and long-term smoking abstinence), using fixed-effect models. Where it was not possible to meta-analyse data, we summarized findings narratively. MAIN RESULTS Twenty-four trials evaluated interventions to help those who smoke to cut down the amount smoked or to replace their regular cigarettes with PREPs, compared to placebo, brief intervention, or a comparison intervention. None of these trials directly tested whether harm reduction strategies reduced the harms to health caused by smoking. Most trials (14/24) tested nicotine replacement therapy (NRT) as an intervention to assist reduction. In a pooled analysis of eight trials, NRT significantly increased the likelihood of reducing CPD by at least 50% for people using nicotine gum or inhaler or a choice of product compared to placebo (risk ratio (RR) 1.75, 95% confidence interval (CI) 1.44 to 2.13; 3081 participants). Where average changes from baseline were compared for different measures, carbon monoxide (CO) and cotinine generally showed smaller reductions than CPD. Use of NRT versus placebo also significantly increased the likelihood of ultimately quitting smoking (RR 1.87, 95% CI 1.43 to 2.44; 8 trials, 3081 participants; quality of the evidence: low). Two trials comparing NRT and behavioural support to brief advice found a significant effect on reduction, but no significant effect on cessation. We found one trial investigating each of the following harm reduction intervention aids: bupropion, varenicline, electronic cigarettes, snus, plus another of nicotine patches to facilitate temporary abstinence. The evidence for all five intervention types was therefore imprecise, and it is unclear whether or not these aids increase the likelihood of smoking reduction or cessation. Two trials investigating two different types of behavioural advice and instructions on reducing CPD also provided imprecise evidence. Therefore, the evidence base for this comparison is inadequate to support the use of these types of behavioural advice to reduce smoking. Four studies of PREPs (cigarettes with reduced levels of tar, carbon and nicotine, and in one case delivered using an electronically-heated cigarette smoking system) showed some reduction in exposure to some toxicants, but it is unclear whether this would substantially alter the risk of harm. We judged the included studies to be generally at a low or unclear risk of bias; however, there were some ratings of high risk, due to a lack of blinding and the potential for detection bias. Using the GRADE system, we rated the overall quality of the evidence for our cessation outcomes as 'low' or 'very low', due to imprecision and indirectness. A 'low' grade means that further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate. A 'very low' grade means we are very uncertain about the estimate. AUTHORS' CONCLUSIONS People who do not wish to quit can be helped to cut down the number of cigarettes they smoke and to quit smoking in the long term, using NRT, despite original intentions not to do so. However, we rated the evidence contributing to the cessation outcome for NRT as 'low' by GRADE standards. There is a lack of evidence to support the use of other harm reduction aids to reduce the harm caused by continued tobacco smoking. This could simply be due to the lack of high-quality studies (our confidence in cessation outcomes for these aids is rated 'low' or 'very low' due to imprecision by GRADE standards), meaning that we may have missed a worthwhile effect, or due to a lack of effect on reduction or quit rates. It is therefore important that more high-quality RCTs are conducted, and that these also measure the long-term health effects of treatments.
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Affiliation(s)
- Nicola Lindson‐Hawley
- University of OxfordNuffield Department of Primary Care Health SciencesRadcliffe Observatory QuarterWoodstock RoadOxfordOxfordshireUKOX2 6GG
| | - Jamie Hartmann‐Boyce
- University of OxfordNuffield Department of Primary Care Health SciencesRadcliffe Observatory QuarterWoodstock RoadOxfordOxfordshireUKOX2 6GG
| | - Thomas R Fanshawe
- University of OxfordNuffield Department of Primary Care Health SciencesRadcliffe Observatory QuarterWoodstock RoadOxfordOxfordshireUKOX2 6GG
| | - Rachna Begh
- University of OxfordNuffield Department of Primary Care Health SciencesRadcliffe Observatory QuarterWoodstock RoadOxfordOxfordshireUKOX2 6GG
| | - Amanda Farley
- University of BirminghamPublic Health, Epidemiology and BiostatisticsEdgbastonBirminghamWest MidlandsUKB15 2TT
| | - Tim Lancaster
- University of OxfordNuffield Department of Primary Care Health SciencesRadcliffe Observatory QuarterWoodstock RoadOxfordOxfordshireUKOX2 6GG
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The challenge of reducing smoking in people with serious mental illness. THE LANCET RESPIRATORY MEDICINE 2016; 4:835-844. [DOI: 10.1016/s2213-2600(16)30228-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 07/18/2016] [Accepted: 07/19/2016] [Indexed: 12/28/2022]
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Paul C, Wolfenden L, Tzelepis F, Yoong S, Bowman J, Wye P, Sherwood E, Rose S, Wiggers J. Nicotine replacement therapy as a smoking cessation aid among disadvantaged smokers: What answers do we need? Drug Alcohol Rev 2015; 35:785-789. [PMID: 26661119 DOI: 10.1111/dar.12362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 09/03/2015] [Accepted: 10/06/2015] [Indexed: 11/30/2022]
Abstract
In Australia and New Zealand, population groups who experience social disadvantage smoke at much higher rates than the general population. As there are limited data specific to these groups regarding the success of nicotine replacement therapy for smoking cessation, this commentary will provide an overview of the relevant international literature supplemented with observational data relevant to the policy contexts in Australia and New Zealand. [Paul C, Wolfenden L, Tzelepis F, Yoong S, Bowman J, Wye P, Sherwood E, Rose S, Wiggers J. Nicotine replacement therapy as a smoking cessation aid among disadvantaged smokers: What answers do we need? Drug Alcohol Rev 2016;35:785-789].
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Affiliation(s)
- Christine Paul
- Priority Research Centre for Health Behaviour, University of Newcastle, Newcastle, Australia.,Hunter Medical Research Institute, HMRI Building, University of Newcastle, Newcastle, Australia
| | - Luke Wolfenden
- Priority Research Centre for Health Behaviour, University of Newcastle, Newcastle, Australia.,Hunter Medical Research Institute, HMRI Building, University of Newcastle, Newcastle, Australia.,Hunter New England Population Health, Newcastle, Australia
| | - Flora Tzelepis
- Priority Research Centre for Health Behaviour, University of Newcastle, Newcastle, Australia.,Hunter Medical Research Institute, HMRI Building, University of Newcastle, Newcastle, Australia.,Hunter New England Population Health, Newcastle, Australia
| | - Serene Yoong
- Priority Research Centre for Health Behaviour, University of Newcastle, Newcastle, Australia.,Hunter Medical Research Institute, HMRI Building, University of Newcastle, Newcastle, Australia.,Hunter New England Population Health, Newcastle, Australia
| | - Jenny Bowman
- Priority Research Centre for Health Behaviour, University of Newcastle, Newcastle, Australia.,Hunter Medical Research Institute, HMRI Building, University of Newcastle, Newcastle, Australia
| | - Paula Wye
- Hunter Medical Research Institute, HMRI Building, University of Newcastle, Newcastle, Australia.,Hunter New England Population Health, Newcastle, Australia
| | - Emma Sherwood
- Priority Research Centre for Health Behaviour, University of Newcastle, Newcastle, Australia.,Hunter Medical Research Institute, HMRI Building, University of Newcastle, Newcastle, Australia
| | - Shiho Rose
- Priority Research Centre for Health Behaviour, University of Newcastle, Newcastle, Australia.,Hunter Medical Research Institute, HMRI Building, University of Newcastle, Newcastle, Australia
| | - John Wiggers
- Priority Research Centre for Health Behaviour, University of Newcastle, Newcastle, Australia.,Hunter Medical Research Institute, HMRI Building, University of Newcastle, Newcastle, Australia.,Hunter New England Population Health, Newcastle, Australia
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Azorin JM, Simon N, Adida M, Belzeaux R. Pharmacological treatment of schizophrenia with comorbid substance use disorder. Expert Opin Pharmacother 2015; 17:231-53. [DOI: 10.1517/14656566.2016.1114101] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Chou KJ, Chen HK, Hung CH, Chen TT, Chen CM, Wu BJ. Readiness to quit as a predictor for outcomes of smoking-reduction programme with transdermal nicotine patch or bupropion in a sample of 308 patients with schizophrenia. Eur Arch Psychiatry Clin Neurosci 2015; 265:249-57. [PMID: 25005553 DOI: 10.1007/s00406-014-0515-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Accepted: 06/28/2014] [Indexed: 10/25/2022]
Abstract
Readiness to quit has been found to predict smoking-cessation outcomes in a general population. However, little is known about the relationship between the readiness to quit and smoking-reduction outcomes in patients with schizophrenia treated with pharmacological adjuvants. The aim of this study was to examine the association between readiness to quit and smoking-reduction outcomes in patients with schizophrenia. A total of 308 subjects using nicotine replacement therapy (NRT) (N = 242) or bupropion (N = 66) participated in an 8-week smoking-reduction programme. Participants were categorised into precontemplators (N = 127), contemplators (N = 76) and preparators (N = 105) to quit smoking based on the transtheoretical model. There was a significant difference in change in number of cigarettes (NOC) (p = 0.007) and Fagerstrom test for nicotine dependence (FTND) score (nicotine dependence level) (p = 0.029) across the stages of change. A linear regression model revealed trend of increasing reduction in NOC and FTND scores in different stages of change (NOC: B = -1.22, t = -2.81, p = 0.005; FTND: B = -0.43, t = -2.57, p = 0.011). However, the 7-day point prevalence of abstinence was 5.5% (18/308), but there was no significant association between stage of change and smoking cessation (p = 0.26), possibly due to a very small sample size of successful quitters. In summary, among a cohort of institutionalised chronic schizophrenia patients receiving 8-week NRT or bupropion, stage of change can predict smoking reduction and may serve as a useful indicator for patients' preparedness before a trial of smoking reduction.
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Affiliation(s)
- Kuan-Ju Chou
- Department of Psychiatry, Yuli Hospital, Ministry of Health and Welfare, No. 448 Chung-Hua Road, Yuli Township, 981, Hualien County, Taiwan
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Tsoi DT, Porwal M, Webster AC. Interventions for smoking cessation and reduction in individuals with schizophrenia. Cochrane Database Syst Rev 2013; 2013:CD007253. [PMID: 23450574 PMCID: PMC6486303 DOI: 10.1002/14651858.cd007253.pub3] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND Individuals with schizophrenia smoke more heavily than the general population and this contributes to their higher morbidity and mortality from smoking-related illnesses. It remains unclear what interventions can help them to quit or to reduce smoking. OBJECTIVES To evaluate the benefits and harms of different treatments for nicotine dependence in schizophrenia. SEARCH METHODS We searched electronic databases including MEDLINE, EMBASE and PsycINFO from inception to October 2012, and the Cochrane Tobacco Addiction Group Specialized Register in November 2012. SELECTION CRITERIA We included randomised trials for smoking cessation or reduction, comparing any pharmacological or non-pharmacological intervention with placebo or with another therapeutic control in adult smokers with schizophrenia or schizoaffective disorder. DATA COLLECTION AND ANALYSIS Two reviewers independently assessed the eligibility and quality of trials, as well as extracted data. Outcome measures included smoking abstinence, reduction in the amount smoked and any change in mental state. We extracted abstinence and reduction data at the end of treatment and at least six months after the intervention. We used the most rigorous definition of abstinence or reduction and biochemically validated data where available. We noted any reported adverse events. Where appropriate, we pooled data using a random-effects model. MAIN RESULTS We included 34 trials (16 trials of cessation; nine trials of reduction; one trial of relapse prevention; eight trials that reported smoking outcomes for interventions aimed at other purposes). Seven trials compared bupropion with placebo; meta-analysis showed that cessation rates after bupropion were significantly higher than placebo at the end of treatment (seven trials, N = 340; risk ratio [RR] 3.03; 95% confidence interval [CI] 1.69 to 5.42) and after six months (five trials, N = 214, RR 2.78; 95% CI 1.02 to 7.58). There were no significant differences in positive, negative and depressive symptoms between bupropion and placebo groups. There were no reports of major adverse events such as seizures with bupropion.Smoking cessation rates after varenicline were significantly higher than placebo, at the end of treatment (2 trials, N = 137; RR 4.74, 95% CI 1.34 to 16.71). Only one trial reported follow-up at six months and the CIs were too wide to provide evidence of a sustained effect (one trial, N = 128, RR 5.06, 95% CI 0.67 to 38.24). There were no significant differences in psychiatric symptoms between the varenicline and placebo groups. Nevertheless, there were reports of suicidal ideation and behaviours from two people on varenicline.Two studies reported that contingent reinforcement (CR) with money may increase smoking abstinence rates and reduce the level of smoking in patients with schizophrenia. However, it is uncertain whether these benefits can be maintained in the longer term. There was no evidence of benefit for the few trials of other pharmacological therapies (including nicotine replacement therapy (NRT)) and psychosocial interventions in helping smokers with schizophrenia to quit or reduce smoking. AUTHORS' CONCLUSIONS Bupropion increases smoking abstinence rates in smokers with schizophrenia, without jeopardizing their mental state. Varenicline may also improve smoking cessation rates in schizophrenia, but its possible psychiatric adverse effects cannot be ruled out. CR may help this group of patients to quit and reduce smoking in the short term. We failed to find convincing evidence that other interventions have a beneficial effect on smoking in schizophrenia.
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Affiliation(s)
- Daniel T Tsoi
- Nottinghamshire Healthcare NHS Trust, Nottingham, UK.
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