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Ellis MS, Xu KY, Tardelli VS, Fidalgo TM, Buttram ME, Grucza RA. Gabapentin Use Among Individuals Initiating Buprenorphine Treatment for Opioid Use Disorder. JAMA Psychiatry 2023; 80:1269-1276. [PMID: 37672238 PMCID: PMC10483381 DOI: 10.1001/jamapsychiatry.2023.3145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 07/05/2023] [Indexed: 09/07/2023]
Abstract
Importance Gabapentin prescriptions have drastically increased in the US due to off-label prescribing in settings such as opioid use disorder (OUD) treatment to manage a range of comorbid conditions and withdrawal symptoms, despite a lack of evidence. Objective To assess the purpose and associated risks of off-label gabapentin use in OUD treatment. Design, Setting, and Participants This retrospective recurrent-event case-control study with a crossover design used administrative claims data from MarketScan Commercial and Multi-State Medicaid databases from January 1, 2006, to December 31, 2016. Individuals aged 12 to 64 years with an OUD diagnosis and filling buprenorphine prescriptions were included in the primary analysis conducted from July 1, 2022, through June 1, 2023. Unit of observation was the person-day. Exposures Days covered by filled gabapentin prescriptions. Main Outcomes and Measures Primary outcomes were receipt of gabapentin in the 90 days after initiation of buprenorphine treatment and drug-related poisoning. Drug-related poisonings were defined using codes from International Classification of Diseases, Ninth Revision, and International Statistical Classification of Diseases and Related Health Problems, Tenth Revision. Results A total of 109 407 patients were included in the analysis (mean [SD] age, 34.0 [11.2] years; 60 112 [54.9%] male). Among the 29 967 patients with Medicaid coverage, 299 (1.0%) were Hispanic, 1330 (4.4%) were non-Hispanic Black, 23 112 (77.1%) were non-Hispanic White, and 3399 (11.3%) were other. Gabapentin was significantly less likely to be prescribed to Black or Hispanic patients, and more likely to be prescribed to female patients, those with co-occurring substance use or mood disorders, and those with comorbid physical conditions such as neuropathic pain. Nearly one-third of persons who received gabapentin (4336 [31.1%]) had at least 1 drug-related poisoning after initiating buprenorphine treatment, compared with 13 856 (14.5%) among persons who did not receive gabapentin. Adjusted analyses showed that days of gabapentin use were not associated with hospitalization for drug-related poisoning (odds ratio, 0.98 [95% CI, 0.85-1.13]). Drug-related poisoning risks did not vary based on dosage. Conclusions and Relevance Gabapentin is prescribed in the context of a myriad of comorbid conditions. Even though persons receiving gabapentin are more likely to have admissions for drug-related poisoning, these data suggest that gabapentin is not associated with an increased risk of drug-related poisoning alongside buprenorphine in adjusted analyses. More data on the safety profile of gabapentin in OUD settings are needed.
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Affiliation(s)
- Matthew S. Ellis
- Department of Psychiatry, Washington University in St Louis, School of Medicine, St Louis, Missouri
| | - Kevin Y. Xu
- Department of Psychiatry, Washington University in St Louis, School of Medicine, St Louis, Missouri
| | - Vitor S. Tardelli
- Department of Psychiatry, Universidade Federal de São Paulo, São Paulo, Brazil
- Translational Addictions Research Laboratory, Centre for Addictions and Mental Health, University of Toronto, Toronto, Ontario, Canada
| | - Thiago M. Fidalgo
- Department of Psychiatry, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Mance E. Buttram
- Department of Health, Human Performance and Recreation, University of Arkansas, Fayetteville
| | - Richard A. Grucza
- Department of Family and Community Medicine, St Louis University, St Louis, Missouri
- Department of Health and Outcomes Research, St Louis University, St Louis, Missouri
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2
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McNeilage AG, Ashton-James CE, Scholz B. "We were all looking for the magic pill": A qualitative study of patient experiences using gabapentinoids for chronic pain. THE INTERNATIONAL JOURNAL OF DRUG POLICY 2023; 119:104112. [PMID: 37453375 DOI: 10.1016/j.drugpo.2023.104112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 06/21/2023] [Accepted: 06/22/2023] [Indexed: 07/18/2023]
Abstract
BACKGROUND Gabapentinoid medications are increasingly being used in chronic pain management, yet very little is known about the experiences of those using them. The aim of this study was to address this gap in the literature by qualitatively exploring the lived experiences of patients using gabapentinoids for chronic pain. METHODS Semi-structured interviews were conducted with 12 adults prescribed a gabapentinoid medication - either pregabalin or gabapentin - for chronic pain in Australia. Interviews were conducted in May 2022 via telephone or online video chat. Audio recordings of the interviews were transcribed verbatim, and data were analysed using reflexive thematic analysis. The Medication Adherence Model was used as a framework for synthesising the data and organising themes. RESULTS For participants in this study, the initial decision to use gabapentinoids for chronic pain was driven by a level of desperation for pain relief, a perceived lack of pain management alternatives, and a belief that the medication was safer and easier to access than opioids. However, once using gabapentinoids, experiences varied considerably with some viewing the medication as effective and safe, and others viewing it as useless or harmful. Some participants expressed concern that they were not adequately informed by their prescribers about the risks of gabapentinoid use. CONCLUSION These findings emphasise the importance of patient-provider communication and taking a patient-centred approach to gabapentinoid prescribing and de-prescribing. Future qualitative research in this area should involve primary care providers to gain a better understanding of factors driving increased gabapentinoid prescribing in chronic pain management as well as barriers to patient education.
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Affiliation(s)
- Amy G McNeilage
- School of Medicine and Psychology, College of Health and Medicine, Australian National University, Canberra, Australian Capital Territory, Australia; Sydney Medical School, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia.
| | - Claire E Ashton-James
- Sydney Medical School, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia.
| | - Brett Scholz
- School of Medicine and Psychology, College of Health and Medicine, Australian National University, Canberra, Australian Capital Territory, Australia
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3
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Chan AYL, Yuen ASC, Tsai DHT, Lau WCY, Jani YH, Hsia Y, Osborn DPJ, Hayes JF, Besag FMC, Lai ECC, Wei L, Taxis K, Wong ICK, Man KKC. Gabapentinoid consumption in 65 countries and regions from 2008 to 2018: a longitudinal trend study. Nat Commun 2023; 14:5005. [PMID: 37591833 PMCID: PMC10435503 DOI: 10.1038/s41467-023-40637-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 08/02/2023] [Indexed: 08/19/2023] Open
Abstract
Recent studies raised concerns about the increasing use of gabapentinoids in different countries. With their potential for misuse and addiction, understanding the global consumption of gabapentinoids will offer us a platform to examine the need for any interventional policies. This longitudinal trend study utilised pharmaceutical sales data from 65 countries and regions across the world to evaluate the global trends in gabapentinoid consumption between 2008-2018. The multinational average annual percentage change of gabapentinoid consumption was +17.20%, increased from 4.17 defined daily dose per ten thousand inhabitants per day (DDD/TID) in 2008 to 18.26 DDD/TID in 2018. High-income countries had the highest pooled gabapentinoid consumption rate (39.92 DDD/TID) in 2018, which was more than six times higher than the lower-middle income countries (6.11 DDD/TID). The study shows that despite differences in healthcare system and culture, a consistent increase in gabapentinoid consumption is observed worldwide, with high-income countries remaining the largest consumers.
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Affiliation(s)
- Adrienne Y L Chan
- Groningen Research Institute of Pharmacy, Unit of Pharmacotherapy, Epidemiology and Economics, University of Groningen, 72 9700, Groningen, The Netherlands
- Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, Hong Kong SAR, China
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
- Research Department of Practice and Policy, School of Pharmacy, University College London, London, WC1H 9JP, UK
| | - Andrew S C Yuen
- Research Department of Practice and Policy, School of Pharmacy, University College London, London, WC1H 9JP, UK
- Centre for Medicines Optimisation Research and Education, University College London Hospitals NHS Foundation Trust, London, NW1 2PG, UK
| | - Daniel H T Tsai
- Centre for Neonatal and Paediatric Infection, St George's University of London, London, SW17 0RE, UK
- School of Pharamcy, Institute of Clinical Pharmacy and Pharmaceutical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wallis C Y Lau
- Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, Hong Kong SAR, China
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
- Research Department of Practice and Policy, School of Pharmacy, University College London, London, WC1H 9JP, UK
- Centre for Medicines Optimisation Research and Education, University College London Hospitals NHS Foundation Trust, London, NW1 2PG, UK
| | - Yogini H Jani
- Research Department of Practice and Policy, School of Pharmacy, University College London, London, WC1H 9JP, UK
- Centre for Medicines Optimisation Research and Education, University College London Hospitals NHS Foundation Trust, London, NW1 2PG, UK
| | - Yingfen Hsia
- Centre for Neonatal and Paediatric Infection, St George's University of London, London, SW17 0RE, UK
- School of Pharmacy, Queen's University Belfast, Belfast, BT9 7BL, UK
| | - David P J Osborn
- Division of Psychiatry, University College London, London, W1T 7BN, UK
- Camden and Islington NHS Foundation Trust, London, NW1 0PE, UK
| | - Joseph F Hayes
- Division of Psychiatry, University College London, London, W1T 7BN, UK
- Camden and Islington NHS Foundation Trust, London, NW1 0PE, UK
| | - Frank M C Besag
- Research Department of Practice and Policy, School of Pharmacy, University College London, London, WC1H 9JP, UK
- East London Foundation NHS Trust, Bedfordshire, MK40 3JT, UK
| | - Edward C C Lai
- School of Pharamcy, Institute of Clinical Pharmacy and Pharmaceutical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Li Wei
- Research Department of Practice and Policy, School of Pharmacy, University College London, London, WC1H 9JP, UK
- Centre for Medicines Optimisation Research and Education, University College London Hospitals NHS Foundation Trust, London, NW1 2PG, UK
| | - Katja Taxis
- Groningen Research Institute of Pharmacy, Unit of Pharmacotherapy, Epidemiology and Economics, University of Groningen, 72 9700, Groningen, The Netherlands
| | - Ian C K Wong
- Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, Hong Kong SAR, China.
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.
- Research Department of Practice and Policy, School of Pharmacy, University College London, London, WC1H 9JP, UK.
- Centre for Medicines Optimisation Research and Education, University College London Hospitals NHS Foundation Trust, London, NW1 2PG, UK.
- Aston School of Pharmacy, Aston University, Birmingham, B4 7ET, UK.
| | - Kenneth K C Man
- Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, Hong Kong SAR, China.
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.
- Research Department of Practice and Policy, School of Pharmacy, University College London, London, WC1H 9JP, UK.
- Centre for Medicines Optimisation Research and Education, University College London Hospitals NHS Foundation Trust, London, NW1 2PG, UK.
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4
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Covvey JR, Blakely ML, Singh R, Peckham AM, Evoy KE. Pharmacist, prescriber, and drug policy expert opinions on gabapentinoid misuse. Res Social Adm Pharm 2023; 19:599-609. [PMID: 36503683 DOI: 10.1016/j.sapharm.2022.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 11/28/2022] [Accepted: 12/03/2022] [Indexed: 12/12/2022]
Abstract
BACKGROUND Gabapentinoids (gabapentin and pregabalin) are widely used in clinical practice, but recent evidence indicates that they carry an increased risk of misuse. As healthcare professionals (HCPs) and policymakers plan different strategies to promote harm reduction, it is important to understand different interested party viewpoints. OBJECTIVE To explore prescriber, pharmacist, and drug policy expert (DPE) awareness, opinions, and experiences regarding gabapentinoid misuse. METHODS A qualitative description study using individual semi-structured virtual interviews was conducted between February and April 2021. Participants included prescribers (physicians, physician assistants [PA], or nurse practitioners [NP]) and pharmacists practicing in outpatient, ambulatory, or community-based healthcare settings; individuals with relevant drug policy expertise were also included. Qualtrics (Provo, Utah) and Zoom (San Jose, California) were used to facilitate quantitative (for initial screening and participant characteristics) and qualitative (interview) data collection. Data were coded and organized into themes in NVivo (QSR International; Burlington, Massachusetts) using thematic analysis steps. RESULTS A total of 43 individuals participated in this study, including 16 (37.2%) pharmacists, 13 (30.2%) physicians, seven (16.3%) NPs, four (9.3%) DPEs, two (4.7%) pharmacist/DPEs, and one (2.3%) PA. Results were organized along four themes: (1) challenges/opportunities in gabapentinoid use; (2) gabapentinoid misuse awareness; (3) solutions to gabapentinoid misuse and (4) contributing barriers in pain management. Participants invoked different opinions in their consideration of gabapentinoid misuse, including the desire for harm reduction, the limitations of the current healthcare and insurance system, the lack of options for pain and substance use disorder treatment, and the influence of patient expectations. CONCLUSIONS Gabapentinoid misuse was commonly framed in comparative fashion to ongoing concerns with opioids, and proposed solutions often focused less on regulatory control and more toward patient and HCP education and an overhaul of the health system approach to substance use and healthcare overall.
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Affiliation(s)
- Jordan R Covvey
- Duquesne University School of Pharmacy, 600 Forbes Ave, Pittsburgh, PA, 15282, USA.
| | - Michelle L Blakely
- University of Wyoming School of Pharmacy, 1000 E University Ave, Laramie, WY, 82071, USA.
| | - Reshmi Singh
- University of Wyoming School of Pharmacy, 1000 E University Ave, Laramie, WY, 82071, USA.
| | - Alyssa M Peckham
- Massachusetts General Hospital, 55 Fruit St, Boston, MA, 02115, USA.
| | - Kirk E Evoy
- The University of Texas at Austin College of Pharmacy, USA; UT Health San Antonio School of Medicine, 7703 Floyd Curl Drive - MC 6220; San Antonio, TX, 78229, USA.
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5
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Perez-Rivera ND, Chang G. E-consultation for medications to treat opioid use disorders: a pilot study. J Addict Dis 2022; 40:428-431. [PMID: 35157563 DOI: 10.1080/10550887.2021.2020044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND AND OBJECTIVES An electronic consultation to provide expert guidance on medications to treat opioid use disorders [MOUD] was piloted. METHODS Medical record review of the first 100 unique patients receiving consultation with 6-month follow-up. Descriptive statistics, chi-square, and Fisher's exact tests of significance were calculated as appropriate. RESULTS Most consultation requests originated from inpatient psychiatry (66%). Patients (67%) and consultants (33%) preferred buprenorphine/naloxone most often (p < 0.0001). Half of the patients received MOUD prior to discharge. Three quarters of the half who kept their first outpatient appointments received the recommended treatment (p < 0.0001). At 6 months, four patients died and four others overdosed only. Type of MOUD was not associated with either overdose or death, but those who overdosed used cannabis, sedative-hypnotics, or stimulants (all, p < 0 .05). DISCUSSION AND CONCLUSIONS Guidance for MOUD offered via e-consultation may have increased outpatient treatment engagement following inpatient treatment.
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Affiliation(s)
- Natasha D Perez-Rivera
- VA Boston Healthcare System, Boston, MA, USA.,Department of Psychiatry, Boston University School of Medicine, Boston, MA, USA
| | - Grace Chang
- VA Boston Healthcare System, Boston, MA, USA.,Department of Psychiatry, Boston University School of Medicine, Boston, MA, USA.,Department of Psychiatry, Harvard Medical School, Boston, MA, USA
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6
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Aindow S, Crossin R, Toop L, Hudson B. Managing the misuse potential and risk of psychological harm from gabapentinoids in primary care in New Zealand. J Prim Health Care 2021; 13:302-307. [PMID: 34937640 DOI: 10.1071/hc21011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 12/01/2021] [Indexed: 11/23/2022] Open
Abstract
Gabapentinoid prescribing is increasing in New Zealand. International evidence suggests that this prescribing trend is followed by increasing harms, including misuse, dependence, overdose, and psychological harms including suicidal thoughts or behaviours. However, there is limited guidance for prescribers on how to manage these potential harms. Here, we summarise the current international literature and identify three main risk factors that can be used for screening purposes when considering prescribing a gabapentinoid, to identify patients that may be at greater risk of harm. Based on current knowledge of harms, we provide guidance to prescribers on monitoring patients taking gabapentinoids. Finally, we summarise the evidence regarding tapering, and highlight key knowledge gaps including other interventions, referral, and data from primary care populations.
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Affiliation(s)
- Shaun Aindow
- University of Otago Medical School, Christchurch, New Zealand
| | - Rose Crossin
- Department of Population Health, University of Otago Medical School, 34 Gloucester St, Christchurch, New Zealand; and Corresponding author.
| | - Les Toop
- Department of General Practice, University of Otago Medical School, Christchurch, New Zealand
| | - Ben Hudson
- Department of General Practice, University of Otago Medical School, Christchurch, New Zealand
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7
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Boggess T, Williamson JC, Niebergall EB, Sexton H, Mazur A, Egleton RD, Grover LM, Risher WC. Alterations in Excitatory and Inhibitory Synaptic Development Within the Mesolimbic Dopamine Pathway in a Mouse Model of Prenatal Drug Exposure. Front Pediatr 2021; 9:794544. [PMID: 34966707 PMCID: PMC8710665 DOI: 10.3389/fped.2021.794544] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 11/18/2021] [Indexed: 12/19/2022] Open
Abstract
The rise in rates of opioid abuse in recent years in the United States has led to a dramatic increase in the incidence of neonatal abstinence syndrome (NAS). Despite improved understanding of NAS and its acute symptoms, there remains a paucity of information regarding the long-term effects of prenatal exposure to drugs of abuse on neurological development. The primary goal of this study was to investigate the effects of prenatal drug exposure on synaptic connectivity within brain regions associated with the mesolimbic dopamine pathway, the primary reward pathway associated with drug abuse and addiction, in a mouse model. Our secondary goal was to examine the role of the Ca+2 channel subunit α2δ-1, known to be involved in key developmental synaptogenic pathways, in mediating these effects. Pregnant mouse dams were treated orally with either the opioid drug buprenorphine (commonly used in medication-assisted treatment for substance use patients), gabapentin (neuropathic pain drug that binds to α2δ-1 and has been increasingly co-abused with opioids), a combination of both drugs, or vehicle daily from gestational day 6 until postnatal day 11. Confocal fluorescence immunohistochemistry (IHC) imaging of the brains of the resulting wild-type (WT) pups at postnatal day 21 revealed a number of significant alterations in excitatory and inhibitory synaptic populations within the anterior cingulate cortex (ACC), nucleus accumbens (NAC), and medial prefrontal cortex (PFC), particularly in the buprenorphine or combinatorial buprenorphine/gabapentin groups. Furthermore, we observed several drug- and region-specific differences in synaptic connectivity between WT and α2δ-1 haploinsufficient mice, indicating that critical α2δ-1-associated synaptogenic pathways are disrupted with early life drug exposure.
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Affiliation(s)
| | | | | | | | | | | | | | - W. Christopher Risher
- Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, United States
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8
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Lavin RA, Liu C, Yuspeh L, Kalia N, Leung N, Tsourmas NF, Williams L, Hunt DL, Bernacki EJ, Tao XG. Trends in the Utilization and Dose of Gabapentinoids in Combination With Opioids in an Injured Worker Population Between 2008 and 2018. J Occup Environ Med 2021; 63:e694-e700. [PMID: 34354021 DOI: 10.1097/jom.0000000000002344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To determine long term (11 year) trends in gabapentin and pregabalin prescribing among workers' compensation claimants at various opioid dose combinations (low, medium, high, and very high) in Louisiana. METHOD A longitudinal study of 18,737 claimants who filled any prescriptions between 2008 and 2018. RESULTS The proportion of claimants prescribed opioids alone at all dose levels decreased dramatically. The proportion claimants prescribed the combination of low dose opioids and low dose gabapentinoids increased (7.7% to 10.9%). Prescribing higher daily doses of gabapentinoids was associated with higher daily doses of opioids. Gabapentinoid prescribing was associated with continued prescribing of medium and high dose opioids as claims matured. CONCLUSIONS Overall opioid prescribing decreased over time, while prescribing low dose opioids with gabapentinoids, increased.
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Affiliation(s)
- Robert A Lavin
- Department of Neurology, University of Maryland School of Medicine, Baltimore, Maryland (Dr Lavin); Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland (Dr Lavin, Mr Yuspeh, Dr Kalia, Dr Leung, Dr Tsourmas, Dr Bernacki, and Dr Tao); Occupational and Environmental Medicine Residency Program, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland (Dr Liu); Strategy, Enterprise Risk, and Research, Louisiana Workers' Compensation Corporation, Baton Rouge, Louisiana (Mr Yuspeh); The General Electric Company, Cincinnati, Ohio (Dr Kalia); Texas Mutual: Workers' Compensation Insurance, Austin, Texas (Dr Leung, Dr Tsourmas, and Dr Williams); Corporate Administration Office, AF Group, Lansing, Michigan (Dr Hunt)
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9
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Abstract
This review summarizes current evidence on the abuse and misuse of the gabapentinoids pregabalin and gabapentin. Pharmacovigilance studies, register-based studies, surveys, clinical toxicology studies, and forensic toxicology studies were identified and scrutinized with the goal to define the problem, identify risk factors, and discuss possible methods to reduce the potential for abuse and misuse. Studies found that gabapentinoids are abused and misused and that individuals with a history of psychiatric disorders or substance use disorder seem to be at high risk. Moreover, some evidence supports the notion that patients with opioid use disorders may be at an increased risk of abusing gabapentinoids. Available evidence also suggests that abuse and misuse are more frequent in users of pregabalin compared with users of gabapentin. Health professionals and prescribers should be aware of the risk for misuse of pregabalin and gabapentin, which eventually could lead to abuse, substance dependence, and intoxications. Prescribing to patients belonging to risk populations such as those with psychiatric disorders or substance use disorder should be avoided if possible and, if prescribed, signs of misuse and abuse should be monitored.
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Affiliation(s)
- Staffan Hägg
- Futurum, Jönköping, Region Jönköping County and Department of Biomedicine and Clinical Sciences, Faculty of Medicine and Health Sciences, Linköping University, Futurum, Hus B4, Ryhov Hospital, S-551 85, Jönköping, Sweden.
| | - Anna K Jönsson
- Division of Drug Research, Department of Biomedicine and Clinical Sciences, Faculty of Medicine and Health Sciences, Linköping University, Linköping, Sweden
- Department of Forensic Genetics and Forensic Chemistry, National Board of Forensic Medicine, Linköping, Sweden
| | - Johan Ahlner
- Division of Drug Research, Department of Biomedicine and Clinical Sciences, Faculty of Medicine and Health Sciences, Linköping University, Linköping, Sweden
- Department of Forensic Genetics and Forensic Chemistry, National Board of Forensic Medicine, Linköping, Sweden
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10
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Evoy KE, Peckham AM, Covvey JR, Tidgewell KJ. Gabapentinoid Pharmacology in the Context of Emerging Misuse Liability. J Clin Pharmacol 2021; 61 Suppl 2:S89-S99. [PMID: 34396549 DOI: 10.1002/jcph.1833] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 02/13/2021] [Indexed: 12/15/2022]
Abstract
This article will review the epidemiology and pharmacology of gabapentinoids (gabapentin and pregabalin) relevant to their emerging misuse potential and provide guidance for clinical and regulatory management. Gabapentinoids are γ-aminobutyric acid analogues that produce their therapeutic effects by inhibiting voltage-gated calcium channels and decreasing neurotransmitter release. Recently gabapentinoid prescribing and use have increased tremendously. Although traditionally thought to possess a favorable safety profile, gabapentinoid misuse has also risen significantly. Gabapentinoid misuse generally occurs in combination with other substances, most notably opioids, and may be for purposes of eliciting euphoric effects, enhancing the effects of other substances, or self-treating conditions such as withdrawal, pain, anxiety, or insomnia. Given its faster onset, increased bioavailability and potency, and nonsaturable absorption, pregabalin's pharmacokinetics theoretically enhance its misuse liability versus gabapentin. However, gabapentin can produce similar euphoric effects, and epidemiologic studies have identified higher rates of gabapentin misuse in the United States, likely because of greater availability and less regulated prescribing. Although adverse events of gabapentinoid-only ingestion are relatively benign, a growing body of evidence indicates that gabapentinoids significantly increase opioid-related morbidity and mortality when used concomitantly. In addition, significant withdrawal effects may occur on abrupt discontinuation. As a result of these trends, several US states have begun to further regulate gabapentinoid prescribing, reclassifying it as a controlled substance or mandating reporting to local prescription drug-monitoring programs. Although increased regulation of gabapentin prescribing may be warranted, harm reduction efforts and increased patient and provider education are necessary to mitigate this concerning gabapentinoid misuse trend.
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Affiliation(s)
- Kirk E Evoy
- The University of Texas at Austin College of Pharmacy, Austin, Texas, USA.,University Health System, San Antonio, Texas, USA
| | - Alyssa M Peckham
- School of Pharmacy, Northeastern University, Boston, Massachusetts, USA.,Department of Pharmacy, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Jordan R Covvey
- Duquesne University School of Pharmacy, Pittsburgh, Pennsylvania, USA
| | - Kevin J Tidgewell
- Duquesne University School of Pharmacy, Pittsburgh, Pennsylvania, USA
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11
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Nguyen ATM, Quach TVB, Kotha P, Chien SY, MacDonald IJ, Lane HY, Tu CH, Lin JG, Chen YH. Electroacupuncture prevents cocaine-induced conditioned place preference reinstatement and attenuates ΔFosB and GluR2 expression. Sci Rep 2021; 11:13694. [PMID: 34211013 PMCID: PMC8249658 DOI: 10.1038/s41598-021-93014-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 06/10/2021] [Indexed: 02/06/2023] Open
Abstract
Acupuncture has been used for treating drug addiction since the 1970s, but little is known about the mechanisms by which acupuncture affects drug cue-induced relapse. The transcription factor delta-FosB (ΔFosB) plays a critical role in behavior and pathology after chronic use of cocaine. ΔFosB regulates glutamate receptor signaling and dendritic spine morphology in animal models. This experimental study compared the effects of electroacupuncture (EA) at acupoints LI4 and LI11 with those of another potentially beneficial intervention, gabapentin (GBP), alone or in combination, on reinstatement of cocaine-induced conditioned place preference (CPP) and levels of ΔFosB and glutamate receptor subunit 2 (GluR2) expression in the nucleus accumbens (NAc). EA at LI4 and LI11 significantly prevented cue-induced cocaine CPP reinstatement, whereas needle insertion without electrical stimulation at these acupoints had no such effect. EA also significantly attenuated cocaine-induced increases in ΔFosB and GluR2 expression in the NAc. Unexpectedly, these effects were reversed when GBP was combined with EA. Treatment with EA at LI4 and LI11 prevented cocaine-induced increases in dendritic spine density in the NAc core and shell. Our results suggest that EA at LI4 and LI11 may prevent cocaine relapse by modulating ΔFosB and GluR2 expression, as well as dendritic spine density.
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Affiliation(s)
- Ai T M Nguyen
- School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Tran V B Quach
- Graduate Institute of Acupuncture Science, College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Peddanna Kotha
- Graduate Institute of Acupuncture Science, College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Szu-Yu Chien
- Graduate Institute of Acupuncture Science, College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Iona J MacDonald
- Graduate Institute of Acupuncture Science, College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Hsien-Yuan Lane
- Graduate Institute of Biomedical Sciences, College of Medicine, China Medical University, Taichung, Taiwan
- Department of Psychiatry, China Medical University Hospital, Taichung, Taiwan
- Department of Psychology, College of Medical and Health Science, Asia University, Taichung, Taiwan
| | - Cheng-Hao Tu
- Graduate Institute of Acupuncture Science, College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Jaung-Geng Lin
- School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan.
| | - Yi-Hung Chen
- Graduate Institute of Acupuncture Science, College of Chinese Medicine, China Medical University, Taichung, Taiwan.
- Chinese Medicine Research Center, China Medical University, Taichung, Taiwan.
- Department of Photonics and Communication Engineering, Asia University, Taichung, Taiwan.
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12
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Oldfield BJ, Li Y, Vickers-Smith R, Becker WC, Barry DT, Crystal S, Gordon KS, Kerns RD, Rentsch CT, Marshall BDL, Edelman EJ. Sociodemographic and clinical correlates of gabapentin receipt with and without opioids among a national cohort of patients with HIV. AIDS Care 2021; 34:1053-1063. [PMID: 34114904 PMCID: PMC8664891 DOI: 10.1080/09540121.2021.1939851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Gabapentin is commonly prescribed for chronic pain, including to patients with HIV (PWH). There is growing concern regarding gabapentin's potential for harm, particularly in combination with opioids. Among PWH, we examined factors associated with higher doses of gabapentin receipt and determined if receipt varied by opioid use. We examined data from the Veterans Aging Cohort Study, a national prospective cohort including PWH, from 2002 through 2017. Covariates included prescribed opioid dose, self-reported past year opioid use, and other sociodemographic and clinical variables. We used multinomial logistic regression to determine independent predictors of gabapentin receipt. Among 3,702 PWH, 902 (24%) received any gabapentin during the study period at a mean daily dose of 1,469 mg. In the multinomial model, high-dose gabapentin receipt was associated with high-dose benzodiazepine receipt (adjusted odds ratio [aOR], 95% confidence interval [CI]= 1.53, [1.03-2.27]), pain interference (1.65 [1.39-1.95]), and hand or foot pain (1.81, [1.45-2.26]). High-dose gabapentin receipt was associated with prescribed high-dose opioids receipt (2.66 [1.95-3.62]) but not self-reported opioid use (1.03 [0.89-1.21]). PWH prescribed gabapentin at higher doses are more likely to receive high-dose opioids and high-dose benzodiazepines, raising safety concerns.
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Affiliation(s)
- Benjamin J Oldfield
- Yale School of Medicine, New Haven, CT, USA.,Fair Haven Community Health Care, New Haven, CT, USA
| | - Yu Li
- Brown University School of Public Health, Providence, RI, USA
| | - Rachel Vickers-Smith
- Center on Drug and Alcohol Research, Department of Behavioral Science, University of Kentucky College of Medicine, Lexington, KY, USA.,University of Kentucky College of Public Health, Lexington, KY, USA
| | - William C Becker
- Yale School of Medicine, New Haven, CT, USA.,VA Connecticut Healthcare System, West Haven, CT, USA
| | | | - Stephen Crystal
- Center for Health Services Research, Institute for Health, Rutgers University, Rutgers, NJ, USA
| | - Kirsha S Gordon
- Yale School of Medicine, New Haven, CT, USA.,VA Connecticut Healthcare System, West Haven, CT, USA
| | - Robert D Kerns
- Yale School of Medicine, New Haven, CT, USA.,VA Connecticut Healthcare System, West Haven, CT, USA
| | - Christopher T Rentsch
- VA Connecticut Healthcare System, West Haven, CT, USA.,London School of Hygiene and Tropical Medicine, London, UK
| | | | - E Jennifer Edelman
- Yale School of Medicine, New Haven, CT, USA.,Center for Interdisciplinary Research on AIDS, Yale School of Public Health, New Haven, CT, USA
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13
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Zhang Y, Castracane AR, Winstanley EL. Assessment of gabapentin misuse using prescription drug monitoring program data. Subst Abus 2021; 42:454-459. [PMID: 33689673 DOI: 10.1080/08897077.2021.1891602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
BACKGROUND Gabapentin is an anticonvulsant medication with potential misuse reported in case reports and population studies, highlighting the need to reexamine its abuse liability. The purpose of this study was to describe gabapentin dispensing patterns and assess potential misuse. Methods: We used data from Ohio's Prescription Drug Monitoring Program (PDMP) from December 1, 2016 to March 31, 2017 and restricted the population to adults who filled at least one gabapentin prescription (N = 379,372). Gabapentin dispensing patterns are described and multiple strategies were used to assess potential misuse, including Lorenz-1 curve analysis. Supratherapeutic dosing, number of prescribers and number of pharmacies used were compared for individuals who were co-dispensed medications for opioid use disorder (MOUD) and those who were not. Results: More than one million gabapentin prescriptions were dispensed during the 4-month period, with a mean dose of 1103.8 mg. While few individuals received supratherapeutic dosing, exceptionally high doses were observed. Half of the individuals (50.9%) were co-dispensed gabapentin and opioids. The Lorenz-1 value for gabapentin (5.5%) did not exceed the threshold for misuse potential. Individuals co-dispensed MOUD were more likely to have supratherapeutic dosing; however, they had a lower Lorenz-1 value compared to individuals not co-dispensed MOUD. Conclusions: Among Ohio residents dispensed gabapentin, there was no evidence of misuse using PDMP data based on the Lorenz-1 value, yet supratherapeutic dosing of gabapentin was observed and was associated with OUD. New strategies may be needed to identify the non-medical use of gabapentin.
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Affiliation(s)
- Yifan Zhang
- School of Pharmacy, West Virginia University, Morgantown, West Virginia, USA
| | | | - Erin L Winstanley
- Department of Behavioral Medicine and Psychiatry, School of Medicine and Rockefeller Neuroscience Institute, West Virginia University, Morgantown, West Virginia, USA.,Department of Neuroscience, School of Medicine, West Virginia University, Morgantown, West Virginia, USA
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14
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Ibiloye EA, Barner JC, Lawson KA, Rascati KL, Evoy KE, Peckham AM. Prevalence of and Factors Associated with Gabapentinoid Use and Misuse Among Texas Medicaid Recipients. Clin Drug Investig 2021; 41:245-253. [PMID: 33580482 DOI: 10.1007/s40261-021-01009-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/27/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND AND OBJECTIVES Gabapentin and pregabalin have been considered relatively safe opioid-sparing adjuncts for pain management. However, rising prescribing trends, presence of gabapentinoids in opioid-related overdoses, and the growing body of evidence regarding gabapentinoid misuse and abuse, have caused gabapentinoids to emerge as a drug class of public health concern. This study aimed to assess the prevalence of, and factors associated with gabapentinoid use and misuse. METHODS This retrospective study of Texas Medicaid data from 1/1/2012 to 30/8/2016 included patients aged 18-63 years at index date, with ≥ 1 gabapentinoid prescription, and continuously enrolled 6 months pre-index and 12 months post-index. Gabapentinoid misuse was defined as ≥ 3 claims exceeding daily doses of 3600 mg for gabapentin and 600 mg for pregabalin. Age, gender, concurrent opioid use, neuropathic pain diagnoses and gabapentinoid type were independent variables. Descriptive and inferential statistics were used. RESULTS Of included subjects (N = 39,000), 0.2% (N = 81) met study criteria for gabapentinoid misuse. Overall, the majority (76.4%) of gabapentinoid users were aged 41-63 years with a mean ± SD age of 48.2 ± 10.7 years. Those patients meeting the study criteria for gabapentinoid misuse were significantly younger (45.1 ± 11.0 vs 48.2 ± 10.7, p = 0.0084). Majority of the study sample was female (68.1%). However, a significantly higher proportion of males met the study criteria for gabapentinoid misuse compared to females (0.3% vs 0.2%, p = 0.0079). Approximately one-half (51.9%) of the study sample had neuropathic pain, and gabapentinoid misuse was significantly higher in neuropathic pain patients compared to those without neuropathic pain (0.3% vs 0.1%, p = 0.0078). Over three-quarters (77.4%) of patients were using gabapentin; however, gabapentinoid misuse was significantly higher among pregabalin users (0.4% vs 0.2%, p = 0.0003). Approximately 20% (17.3%) of gabapentinoid users had ≥ 90 days of concurrent opioid use. However, there was no significant difference in gabapentinoid misuse among patients with concurrent opioid use compared to patients without (0.3% vs 0.2%, p = 0.1440). Factors significantly associated with misuse included: male sex (odds ratio [OR] 0.486; 95% confidence interval [CI] 0.313-0.756; p = 0.0013); neuropathic pain (OR 2.065; 95% CI 1.289-3.308; p = 0.0026); and pregabalin versus gabapentin use (OR 2.337, 95% CI 1.492-3.661; p = 0.0002). Concurrent opioid use was not significantly associated with gabapentinoid misuse (OR 1.542, 95% CI 0.920-2.586; p = 0.1006). CONCLUSION Prevalence of gabapentinoid misuse was low (0.2%) among Texas Medicaid recipients. Younger age, male gender, neuropathic pain diagnosis and pregabalin use were significantly associated with higher levels of gabapentinoid misuse.
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Affiliation(s)
- Elizabeth A Ibiloye
- Division of Health Outcomes, College of Pharmacy, University of Texas at Austin, Austin, Texas, USA.
| | - Jamie C Barner
- Division of Health Outcomes, College of Pharmacy, University of Texas at Austin, Austin, Texas, USA
| | - Kenneth A Lawson
- Division of Health Outcomes, College of Pharmacy, University of Texas at Austin, Austin, Texas, USA
| | - Karen L Rascati
- Division of Health Outcomes, College of Pharmacy, University of Texas at Austin, Austin, Texas, USA
| | - Kirk E Evoy
- Pharmacotherapy Division, College of Pharmacy, University of Texas at Austin, San Antonio, Texas, USA
- University Health System, San Antonio, Texas, USA
| | - Alyssa M Peckham
- Department of Pharmacy and Health Systems Sciences, School of Pharmacy, Northeastern University, Boston, Massachusetts, USA
- Department of Pharmacy, Massachusetts General Hospital, Boston, Massachusetts, USA
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15
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Evoy KE, Covvey JR, Peckham AM, Reveles KR. Gabapentinoid misuse, abuse and non-prescribed obtainment in a United States general population sample. Int J Clin Pharm 2021; 43:1055-1064. [PMID: 33387188 DOI: 10.1007/s11096-020-01217-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 12/08/2020] [Indexed: 11/24/2022]
Abstract
Background Reports of gabapentinoid (gabapentin and pregabalin) misuse are on the rise, but few studies have assessed this within the general US population. Objective Describe lifetime misuse/abuse/non-prescribed obtainment of gabapentinoids and descriptive characteristics associated with such actions in a US general population sample. Setting This cross-sectional questionnaire was administered online by Qualtrics® research panel aggregator via quota-based sampling. Methods Data were collected from a sample of respondents that mirrored the general US population aged 18-59 years with regards to age, geographic region, ethnicity, income, and education level, based on most recent census data. Misuse/abuse/non-prescribed obtainment was collectively defined as use of a gabapentinoid for reasons other than a diagnosed medical condition, using with the intention of altering one's state of consciousness, or obtaining without a prescription. A multivariable logistic regression model was created to predict misuse/abuse/non-prescribed obtainment of gabapentinoids, incorporating relevant covariates. Main outcome measure Proportion of sample indicating lifetime misuse/abuse/non-prescribed obtainment of gabapentinoids. Results Among 1,843 respondents, 121 (6.6%) reported gabapentinoid misuse/abuse/non-prescribed obtainment. Specifically, 2.1% (n = 39) and 1.5% (n = 27) of respondents for gabapentin and pregabalin, respectively, met study criteria for abuse. Opioids were the most common medication co-administered with gabapentinoids (among 50-70% of respondents) for misuse/abuse. Previous treatment for addiction (OR: 2.61, 95% CI: 1.32-5.14, p = 0.005) and the total attitudinal risk score (OR: 1.14, 95% CI: 1.09-1.19, p < 0.001) were associated with gabapentinoid misuse/abuse/non-prescribed obtainment. Conclusion Among those surveyed, 6.6% reported previous gabapentinoid misuse/abuse/non-prescribed obtainment, providing one of the first estimates within a nationally distributed, US general population sample.
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Affiliation(s)
- Kirk E Evoy
- The University of Texas At Austin College of Pharmacy, 7703 Floyd Curl Dr. - MC 6220, San Antonio, TX, 78229, USA. .,University Health System, San Antonio, TX, USA. .,The University of Texas Health San Antonio School of Medicine, 7703 Floyd Curl Dr. MC - 6220, San Antonio, TX, 78229, USA.
| | - Jordan R Covvey
- Duquesne University School of Pharmacy, 600 Forbes Avenue, 418 Mellon Hall, Pittsburgh, PA, 15282, USA
| | - Alyssa M Peckham
- School of Pharmacy, Northeastern University, Bouvé College of Health Sciences, 360 Huntington Ave, Boston, MA, R218 TF02115, USA.,Department of Pharmacy, Massachusetts General Hospital, 360 Huntington Ave, Boston, MA, R218 TF02115, USA
| | - Kelly R Reveles
- The University of Texas At Austin College of Pharmacy, 7703 Floyd Curl Dr. - MC 6220, San Antonio, TX, 78229, USA.,The University of Texas Health San Antonio School of Medicine, 7703 Floyd Curl Dr. MC - 6220, San Antonio, TX, 78229, USA
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16
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Abstract
BACKGROUND A 2017 systematic review (SR) identified 59 studies examining gabapentinoid (pregabalin and gabapentin) misuse/abuse. Evidence of gabapentinoid misuse/abuse has since grown substantially. OBJECTIVE Update previous SR and describe new insights regarding gabapentinoid abuse. METHODS A SR of PubMed was conducted to identify studies published from 7/29/2016-8/31/2020. Four searches were performed using the following terms: "gabapentin [MeSH] OR pregabalin [MeSH] OR gabapentinoid" AND one of the following substance misuse/abuse-related terms: "substance-related disorders [MeSH]", "overdose", "abuse", or "misuse". Clinicaltrials.gov and the Cochrane Library database were searched to identify ongoing studies or similar SRs. Reference lists of included studies were reviewed to identify additional literature. All studies with novel data related to pregabalin and/or gabapentin abuse, misuse, or overdose conducted during the study period were included. Articles not written in English, review articles, and animal studies were excluded. RESULTS Fifty-five studies were included (29 [52.7%] from North America, 17 [30.9%] Europe, 6 [10.9%] Asia, and 3 [5.5%] Australia). Forty-six observational studies and 10 case reports/series were included (one manuscript included both). Twenty (36.4%) studied gabapentin only, 18 (32.7%) pregabalin only, and 17 (30.9%) both pregabalin/gabapentin. These studies corroborate findings from the previous SR that gabapentinoids are increasingly abused or misused to self-medicate, that gabapentinoids can produce desirable effects alone but are often used concomitantly with other drugs, and that opioid use disorder is the greatest risk factor for gabapentinoid abuse. While the original SR identified the largest studies having been published in Europe, this review identified several more generalisable US studies that have subsequently been conducted. The most concerning finding was increased evidence of associated patient harm, including increased hospital utilisation and opioid-related overdose mortality risk. CONCLUSION Evidence suggests that gabapentinoid misuse/abuse represents a growing trend that is causing significant patient harm. Prescribers should exercise appropriate caution with use in high-risk populations and monitor for signs of misuse or abuse.
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17
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Buttram ME, Kurtz SP. Descriptions of Gabapentin Misuse and Associated Behaviors among a Sample of Opioid (Mis)users in South Florida. J Psychoactive Drugs 2020; 53:47-54. [PMID: 32748701 DOI: 10.1080/02791072.2020.1802087] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Gabapentin has received increased attention due to a growing number of reports of misuse and diversion. However, significant details about gabapentin misuse are scant. Data are drawn from a mixed-methods study examining gabapentin misuse in South Florida. The sample includes 49 respondents who were age 18 or over and reported past year use of illicit opioids and/or the misuse of prescription opioid medications, as well as, recent (past 90 days) gabapentin misuse. Respondents were female (40.8%), Hispanic (30.6%), Black (16.3%), white (49.0%), and other race/ethnicity (4.1%). Mean age was 37.6. Many respondents (43%) misused gabapentin without ever receiving a prescription and 14% misused prior to being prescribed. Mean frequency of recent misuse was 25.4 days and included a mean of 51.65 pills/doses. Prevalent routes of administration included swallowing (85.7%) and snorting (10.2%). Gabapentin misuse occurred concomitantly with any opioid (44.9%), benzodiazepines (38.8%), alcohol (24.5%), and powder cocaine (24.5), among others. Respondents' descriptions indicate that gabapentin produces feelings reminiscent of alcohol intoxication or opioid-induced euphoria, but for some it produces no noticeable effect or only alleviates pain. Greater understanding of gabapentin misuse, especially associated behaviors and concomitant use is needed to inform prevention and intervention efforts, and to guide policy approaches.
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Affiliation(s)
- Mance E Buttram
- Center for Applied Research on Substance Use and Health Disparities, Nova Southeastern University, Miami, FL, USA
| | - Steven P Kurtz
- Center for Applied Research on Substance Use and Health Disparities, Nova Southeastern University, Miami, FL, USA
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18
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Boggess T, Risher WC. Clinical and basic research investigations into the long-term effects of prenatal opioid exposure on brain development. J Neurosci Res 2020; 100:396-409. [PMID: 32459039 DOI: 10.1002/jnr.24642] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 04/01/2020] [Accepted: 04/27/2020] [Indexed: 12/26/2022]
Abstract
Coincident with the opioid epidemic in the United States has been a dramatic increase in the number of children born with neonatal abstinence syndrome (NAS), a form of withdrawal resulting from opioid exposure during pregnancy. Many research efforts on NAS have focused on short-term care, including acute symptom treatment and weaning of the infants off their drug dependency prior to authorizing their release. However, investigations into the long-term effects of prenatal opioid exposure (POE) on brain development, from the cellular to the behavioral level, have not been as frequent. Given the importance of the perinatal period for human brain development, opioid-induced disturbances in the formation and function of nascent synaptic networks and glia have the potential to impact brain connectivity and cognition long after the drug supply is cutoff shortly after birth. In this review, we will summarize the current state of NAS research, bringing together findings from human studies and preclinical animal models to highlight what is known about how POE can induce significant, prolonged deficits in brain structure and function. With rates of NAS continuing to rise, particularly in regions that already face substantial socioeconomic challenges, we speculate as to the most promising avenues for future research to alleviate this growing multigenerational threat.
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Affiliation(s)
- Taylor Boggess
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University, Huntington, WV, USA
| | - W Christopher Risher
- Department of Biomedical Sciences, Joan C. Edwards School of Medicine at Marshall University, Huntington, WV, USA
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19
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Pauly NJ, Delcher C, Slavova S, Lindahl E, Talbert J, Freeman PR. Trends in Gabapentin Prescribing in a Commercially Insured U.S. Adult Population, 2009-2016. J Manag Care Spec Pharm 2020; 26:246-252. [PMID: 32105169 PMCID: PMC7155217 DOI: 10.18553/jmcp.2020.26.3.246] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Gabapentin is prescribed for a variety of conditions and is often used off label. It is important to understand the prevalence of gabapentin prescribing and the characteristics of individuals who are prescribed gabapentin, given increasing concern regarding its potential for misuse. OBJECTIVES To (a) examine state- and region-level prevalence and trends in gabapentin prescribing from 2009 to 2016 and (b) characterize demographic and clinical characteristics of individuals prescribed gabapentin in a nationwide population of commercially insured adults. METHODS This retrospective, longitudinal study examined trends in gabapentin prescribing from 2009 to 2016. The study population included individuals aged 18-64 years who were enrolled in a commercial insurance plan at any point from 2009 to 2016. Individuals who were prescribed gabapentin were defined as beneficiaries with at least 1 gabapentin prescription claim in a calendar year (CY). A cross-sectional descriptive analysis was performed to examine differences in demographic and clinical characteristics of individuals prescribed or not prescribed gabapentin in CY 2016. RESULTS The prevalence of gabapentin prescribing nearly doubled from 2009 to 2016. During this time, gabapentin prescribing increased in every state (range: 44%-179%). State-specific prevalence rates in 2016 varied from 12.7 to 43.9 per 1,000 beneficiaries. Overall, 2.7% of beneficiaries filled ≥ 1 gabapentin prescription in 2016. Individuals prescribed gabapentin were more likely to fill opioid prescriptions (60.8% vs. 16.5%, P < 0.01); reside in the South (53.7% vs. 47%, P < 0.01); be female (62.5% vs. 52.3%, P < 0.01); and be aged 55-64 years (41.7% vs. 21.2%, P < 0.01) compared with the comparator. Individuals who were prescribed gabapentin also had significantly higher rates of seizure disorders, neuropathic pain, mental health disorders, substance use disorders, and diabetes. CONCLUSIONS The prevalence of gabapentin prescribing among a U.S. privately insured population has increased steadily in recent years. Additional research should examine coprescribing of gabapentin in the context of the opioid epidemic. DISCLOSURES The project described in this study was supported by the NIH National Center for Advancing Translational Sciences through grant number UL1TR001998. This study was also partially supported by grant number 2017-PM-BX-K026 (Data-Driven Responses to Prescription Drug Misuse in Kentucky) awarded by the Bureau of Justice Assistance. Viewpoints or opinions in this document are those of the authors and do not necessarily represent the official position or policies of the U.S. Department of Justice or the official views of the NIH. The authors do not have any conflicts of interest to report. Portions of this study have been previously presented in poster presentations at the 2019 Academy Health Annual Research Meeting; June 2-4, 2019; Washington, DC, and the 2019 University of Kentucky Substance Use Research Day; March 3, 2019; Lexington, KY.
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Affiliation(s)
- Nathan J. Pauly
- Department of Health Policy, Management, and Leadership, West Virginia University School of Public Health, Morgantown
| | - Chris Delcher
- Institute for Pharmaceutical Outcomes and Policy, University of Kentucky College of Pharmacy, Lexington
| | - Svetla Slavova
- Department of Biostatistics, University of Kentucky College of Public Health, Lexington
| | - Eric Lindahl
- Institute for Pharmaceutical Outcomes and Policy, University of Kentucky College of Pharmacy, Lexington
| | - Jeff Talbert
- Institute for Pharmaceutical Outcomes and Policy, University of Kentucky College of Pharmacy, Lexington
| | - Patricia R. Freeman
- Institute for Pharmaceutical Outcomes and Policy, University of Kentucky College of Pharmacy, Lexington
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20
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Buttram ME, Surratt HL. Factors Associated with Gabapentin Misuse among People Who Inject Drugs in Appalachian Kentucky. Subst Use Misuse 2020; 55:2364-2370. [PMID: 32917119 PMCID: PMC7643539 DOI: 10.1080/10826084.2020.1817082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Gabapentin is misused to potentiate the euphoric effects of opioids, self-treat physical pain, and moderate opioid withdrawal symptoms. Because examinations of gabapentin misuse among people who inject drugs (PWID) are scant, the aim of this study is to identify factors associated with gabapentin misuse among this population. Methods: Data are drawn from a study examining the uptake of syringe service programs (SSPs) in Appalachian Kentucky. The sample includes 324 PWID who were age 18 and over and reported past month drug injection. Logistic regression models were constructed to examine recent (past 90 days) gabapentin misuse. Results: Participants are female (50.0%); Hispanic (2.2%), Black (1.5%), white (90.7%), and other race/ethnicity (4.6%). Mean age is 37. Participants reporting gabapentin misuse had higher odds of reporting (mis)use of marijuana, cocaine, methamphetamine, prescription opioids, benzodiazepines, prescription stimulants, fentanyl, and buprenorphine (p < .042); severe substance use disorder (p < .000); and recent physical pain (p < .003). In multivariable models, findings related to misuse of prescription opioids and buprenorphine; severe substance use disorder; and recent physical pain or discomfort, remained significant (p < .042). Conclusions: This is one of the first studies to examine gabapentin misuse among PWID. It is possible that individuals reporting recent gabapentin misuse are attempting to self-treat physical pain when healthcare is limited. Gabapentin may also be misused to achieve desired central nervous system effects and to potentiate opioid highs. Syringe service programs can educate PWID about the potential dangers of polydrug use involving gabapentin and to connect PWID with needed healthcare services.
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Affiliation(s)
- Mance E Buttram
- Center for Applied Research on Substance Use and Health Disparities, Nova Southeastern University, Miami, Florida, USA
| | - Hilary L Surratt
- Department of Behavioral Science, College of Medicine, University of Kentucky, Lexington, Kentucky, USA
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21
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Vickers-Smith R, Sun J, Charnigo RJ, Lofwall MR, Walsh SL, Havens JR. Gabapentin drug misuse signals: A pharmacovigilance assessment using the FDA adverse event reporting system. Drug Alcohol Depend 2020; 206:107709. [PMID: 31732295 PMCID: PMC7762328 DOI: 10.1016/j.drugalcdep.2019.107709] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 10/17/2019] [Accepted: 10/19/2019] [Indexed: 01/09/2023]
Abstract
BACKGROUND Although there have been increasing reports of intentional gabapentin misuse, epidemiological evidence for the phenomenon is limited. The purpose of this study was to determine whether there are pharmacovigilance abuse signals for gabapentin. METHODS Using FDA Adverse Events Reporting System reports from January 1, 2005 to December 31, 2015, we calculated pharmacovigilance signal measures (i.e., reporting odds ratio, proportional reporting ratio, information component, and empirical Bayes geometric mean) for abuse-related adverse event (AR-AE)-gabapentin pairs. Loglinear modeling assessed the frequency of concurrent reporting of abuse-related and abuse-specific AEs (AS-AEs) associated with gabapentin. Findings were compared to a positive (pregabalin) and negative (duloxetine) control. RESULTS From 2005-2015 there were 5,951,229 unique AE reports submitted to the FDA including 99,977 for gabapentin, 73,977 for duloxetine, and 97,813 for pregabalin. Significant drug-AR-AE pair signals involving gabapentin included: drug abuser, multiple drug overdose, and substance-induced psychotic disorder. Significant drug AR-AE signals involving gabapentin and pregabalin, but not duloxetine, were: ataxia, dependence, drug abuse, increased drug tolerance, and overdose. Compared to duloxetine, gabapentin had significantly greater odds of a co-report for an AS-AE with drug withdrawal syndrome (OR: 6.55), auditory hallucinations (OR: 4.57), delusions (OR: 2.36), euphoric mood (OR: 5.45), ataxia (OR: 2.85), drug abuser (OR: 3.01), aggression (OR: 1.98), psychotic disorder (OR: 1.96), and feeling abnormal (OR: 1.31). CONCLUSIONS We identified abuse-related signals for gabapentin and highlighted several CNS effects that may be associated with its abuse. Gabapentin prescribers should be aware of the drug's abuse liability and effects that may accompany its use.
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Affiliation(s)
- Rachel Vickers-Smith
- University of Louisville School of Nursing, Louisville, KY 40202, USA; Department of Biostatistics, University of Kentucky College of Public Health, 111 Washington Avenue, Lexington, KY 40536, USA; Department of Epidemiology, University of Kentucky College of Public Health, 111 Washington Avenue, Lexington, KY 40536, USA; Center on Drug and Alcohol Research, Department of Behavioral Science, University of Kentucky College of Medicine, 845 Angliana Avenue, Lexington, KY 40508, USA.
| | - Jiangwen Sun
- Department of Computer Science, Old Dominion University, Norfolk, VA 23529, USA
| | - Richard J. Charnigo
- Department of Biostatistics, University of Kentucky College of Public Health, 111 Washington Avenue, Lexington, KY 40536, USA
| | - Michelle R. Lofwall
- Center on Drug and Alcohol Research, Department of Behavioral Science, University of Kentucky College of Medicine, 845 Angliana Avenue, Lexington, KY 40508, USA
| | - Sharon L. Walsh
- Center on Drug and Alcohol Research, Department of Behavioral Science, University of Kentucky College of Medicine, 845 Angliana Avenue, Lexington, KY 40508, USA,Department of Pharmaceutical Sciences, University of Kentucky College of Pharmacy, 789 South Limestone, Lexington, KY 40508, USA
| | - Jennifer R.. Havens
- Department of Epidemiology, University of Kentucky College of Public Health, 111 Washington Avenue, Lexington, KY 40536, USA,Center on Drug and Alcohol Research, Department of Behavioral Science, University of Kentucky College of Medicine, 845 Angliana Avenue, Lexington, KY 40508, USA
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22
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Elsayed M, Zeiss R, Gahr M, Connemann BJ, Schönfeldt-Lecuona C. Intranasal Pregabalin Administration: A Review of the Literature and the Worldwide Spontaneous Reporting System of Adverse Drug Reactions. Brain Sci 2019; 9:brainsci9110322. [PMID: 31766153 PMCID: PMC6896010 DOI: 10.3390/brainsci9110322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 10/31/2019] [Accepted: 11/11/2019] [Indexed: 11/16/2022] Open
Abstract
Background: It is repeatedly reported that pregabalin (PRG) and gabapentin feature a potential for abuse/misuse, predominantly in patients with former or active substance use disorder. The most common route of use is oral, though reports of sublingual, intravenous, rectal, and smoking administration also exist. A narrative review was performed to provide an overview of current knowledge about nasal PRG use. Methods: A narrative review of the currently available literature of nasal PRG use was performed by searching the MEDLINE, EMBASE, and Web of Science databases. The abstracts and articles identified were reviewed and examined for relevance. Secondly, a request regarding reports of cases of nasal PRG administration was performed in the worldwide spontaneous reporting system of adverse drug reactions of the European Medicines Agency (EMA, EudraVigilance database). Results: The literature search resulted in two reported cases of nasal PRG use. In the analysis of the EMA-database, 13 reported cases of nasal PRG use (11 male (two not specified), mean age of users = 34.2 years (four not specified)) were found. In two cases fatalities occurred related to PRG nasal use. Conclusions: Even if only little evidence can be found in current literature, the potential for misuse/abuse of PRG via nasal route might be of particular importance in the near future in PRG users who misuse it. Physicians should be aware of these alternative routes of administration.
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Affiliation(s)
- Mohamed Elsayed
- Correspondence: ; Tel.: +49-(0)-731-500-61411; Fax: +49-(0)-731-500-61412
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23
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Buttram ME, Kurtz SP, Cicero TJ, Havens JR. An ethnographic decision model of the initiation of gabapentin misuse among prescription and/or illicit opioid (mis)user. Drug Alcohol Depend 2019; 204:107554. [PMID: 31542629 PMCID: PMC6905052 DOI: 10.1016/j.drugalcdep.2019.107554] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/08/2019] [Accepted: 07/09/2019] [Indexed: 01/21/2023]
Abstract
AIMS Gabapentin is used in the treatment of seizures and neuralgia, and it is prescribed off-label to treat substance use disorders and withdrawal symptoms. Recent research documents misuse of gabapentin, especially among prescription opioid misusers. The present study contributes to this literature by examining the initiation of gabapentin misuse. METHODS Qualitative interviews were conducted with prescription and/or illicit opioid (mis)users who reported a history of gabapentin misuse (N = 62) and who did not (N = 29). During semi-structured interviews, respondents provided descriptions of the first time they misused gabapentin. An ethnographic decision model was constructed to illustrate the factors that influence the initiation decision. RESULTS Multiple individual, social, and environmental factors influence the decision to initiate gabapentin misuse. Respondents described the initiation decision related to: a) wanting to feel a psychoactive high during times of limited access to one's preferred drug because of institutional barriers (e.g., substance abuse treatment; jail; transitional living facility; N = 18); b) the desire to use multiple drugs, including for experimentation or to potentiate another substance (N = 18); and c) the need to self-treat withdrawal symptoms during periods of opioid nonuse or when opioids were unavailable (N = 16). Respondents also initiated gabapentin misuse to self-treat physical pain (N = 10). CONCLUSIONS Multiple approaches are needed to mitigate gabapentin misuse, including limiting availability in institutional settings and informal channels as well as addressing the needs of drug users who experience physical pain and withdrawal symptoms. Continued research is needed to examine therapeutic uses of gabapentin and behaviors related to misuse.
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Affiliation(s)
- Mance E. Buttram
- ARSH: Center for Applied Research on Substance Use and Health Disparities, Nova Southeastern University, 7255 NE 4th Ave., Suite 112, Miami, FL 33138 USA
| | - Steven P. Kurtz
- ARSH: Center for Applied Research on Substance Use and Health Disparities, Nova Southeastern University, 7255 NE 4th Ave., Suite 112, Miami, FL 33138 USA
| | - Theodore J. Cicero
- Department of Psychiatry, Washington University School of Medicine, 660 S. Euclid Ave., Box 8134, St. Louis, MO 63110 USA
| | - Jennifer R. Havens
- Department of Behavioral Science, University of Kentucky, 333 Waller Ave., Suite 480, Lexington, KY 40504 USA
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24
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Kim S. The unsuspected threat of three opioid-like substitutes. Arch Psychiatr Nurs 2019; 33:325-328. [PMID: 31280775 DOI: 10.1016/j.apnu.2019.01.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 01/16/2019] [Accepted: 01/19/2019] [Indexed: 12/24/2022]
Abstract
The opioid epidemic has left its toll on the United States with millions suffering from an opioid use disorder and tens of thousands dying from overdoses each year. With intentions to combat the crisis, health providers have been prescribing less opioids, which resulted in an unintentional increase in the abuse of other opioid-like substances. Three emerging drugs of abuse have been noted in the literature as having increased abuse potential in light of recent trends. Kratom, an herbal supplement, gabapentin, a prescription nerve pain and anticonvulsant medication, and loperamide, an over-the-counter antidiarrheal medication. These have all displayed opioid-like properties at high doses and used to alleviate opioid withdrawal. Healthcare clinicians and patients might not be aware of the potential risks involved with misusing or abusing these opioid substitutes. This article discusses the increased usage of kratom, gabapentin, and loperamide, the abuse potential, adverse effects and withdrawal symptoms of each drug, and nursing implications that impact inpatient safety and management.
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Affiliation(s)
- Sarah Kim
- Pacific Lutheran University, School of Nursing, Tacoma, WA, 98447, United States of America.
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25
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Buttram ME, Kurtz SP, Ellis MS, Cicero TJ. Gabapentin prescribed during substance abuse treatment: The perspective of treatment providers. J Subst Abuse Treat 2019; 105:1-4. [PMID: 31443885 DOI: 10.1016/j.jsat.2019.07.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 07/10/2019] [Accepted: 07/19/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND Gabapentin, a prescription medication approved for the treatment of seizures and neuralgia, is often prescribed off-label for substance use treatment, mental health problems, and pain. Emerging reports also suggest it is misused for the purpose of getting high. The present study examines substance abuse treatment provider key informants' experiences with gabapentin prescribed to clients in treatment. The focus of this exploratory study is to ascertain how gabapentin is used in these settings and the benefits and risks for clients. METHODS Key informants from South Florida participated in confidential, in-depth interviews (N = 12). Data analyses included descriptive and in vivo coding schemes and employed a descriptive qualitative approach. RESULTS All key informants recognized the benefits of prescribing gabapentin to clients in treatment for problems related to withdrawal symptoms, mental distress and pain. At the same time, half of participants described gabapentin misuse among clients and four key informants described such misuse as a first marker of relapse. Key informants also stated that more research must be done about how to use gabapentin effectively in treatment settings. CONCLUSIONS These findings illustrate the lack of clarity about the efficacy of administration of gabapentin in treatment settings. Additional research about how to best use gabapentin, for whom it may be beneficial, and the effect of prescribed gabapentin on addiction recovery is needed.
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Affiliation(s)
- Mance E Buttram
- Center for Applied Research on Substance Use and Health Disparities, Nova Southeastern University, 7255 NE 4th Avenue, Suite 112, Miami, FL 33138, USA.
| | - Steven P Kurtz
- Center for Applied Research on Substance Use and Health Disparities, Nova Southeastern University, 7255 NE 4th Avenue, Suite 112, Miami, FL 33138, USA
| | - Matthew S Ellis
- Washington University, Department of Psychiatry, Campus Box 8134, 600 S. Euclid Avenue, St. Louis, MO 63110, USA
| | - Theodore J Cicero
- Washington University, Department of Psychiatry, Campus Box 8134, 600 S. Euclid Avenue, St. Louis, MO 63110, USA
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