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1.
J Subst Use Addict Treat ; 165: 209441, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-38906417

RESUMO

BACKGROUND: The national opioid crisis continues to intensify, despite the fact that opioid use disorder (OUD) is treatable and opioid overdose deaths are preventable through first-line treatment with medications for opioid use disorder (MOUD). This study identifies and categorizes payment-related barriers that impact MOUD access and retention from both the provider and patient perspectives and provides insight into how these barriers can be addressed. METHODS: We performed a critical review of the literature (peer-reviewed studies and relevant documents from the gray literature) to identify payment-related access and retention barriers to MOUD. We used the results of this review to develop an analytic framework to understand how payment impacts MOUD access and retention for both providers and patients. In addition, we reviewed action plans developed by Massachusetts communities that participated in the Healing Communities Study (HCS) to analyze which payment-related barriers were addressed through the study. RESULTS: We identified 18 payment-related barriers that patients or providers face when initiating or continuing MOUD with either methadone or buprenorphine in Opioid Treatment Programs (OTP) and non-OTP settings. Patient-related barriers mainly relate to health insurance coverage or the design of health plans (e.g., cost sharing, covered benefits) resulting in direct (medical and non-medical) and indirect costs that can affect both access and retention, especially as they relate to services provided in OTPs. Provider-related barriers include low reimbursement and administrative burden and are most likely to impact access to MOUD. Evidence-based strategies to expand MOUD as part of the HCS in Massachusetts targeted about half of the patient and provider payment-related barriers identified. CONCLUSION: Patients and providers face an array of payment-related barriers that impact access to and retention on MOUD, most of which relate to inadequate health insurance coverage, features of health plans, and key federal and state policies. As new regulatory policies are enacted that expand access to MOUD, such as greater flexibility in OTPs and MOUD delivered via telehealth, it will be important to align these delivery changes with payment reform involving payers, providers, and policymakers.


Assuntos
Buprenorfina , Acessibilidade aos Serviços de Saúde , Tratamento de Substituição de Opiáceos , Transtornos Relacionados ao Uso de Opioides , Humanos , Transtornos Relacionados ao Uso de Opioides/economia , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico , Acessibilidade aos Serviços de Saúde/economia , Buprenorfina/uso terapêutico , Buprenorfina/economia , Tratamento de Substituição de Opiáceos/economia , Metadona/uso terapêutico , Metadona/economia , Massachusetts , Estados Unidos , Analgésicos Opioides/economia , Analgésicos Opioides/uso terapêutico
2.
Appl Health Econ Health Policy ; 21(3): 501-510, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36652186

RESUMO

BACKGROUND: Buprenorphine-naloxone is an essential part of the response to opioid poisoning rates in North America. Manipulating market exclusivity is a strategy manufacturers use to increase profitability, as evidenced by Suboxone in the USA. OBJECTIVE: To investigate excess costs of buprenorphine-naloxone due to unmerited market exclusivity (no legal patent or data protection) in Canada. METHODS: Using controlled interrupted time-series, this study examined changes in the cost of buprenorphine-naloxone before and after the first generics were listed on public formularies. Methadone cost was the control. Public data from the Canadian Institute of Health Information in British Columbia, Manitoba, and Saskatchewan were used. All buprenorphine-naloxone and methadone claims (2010-2019) accepted for payment by the provincial drug plan/programme were collected. Primary outcome was mean cost per mg of buprenorphine-naloxone after the first listing of generics. RESULTS: Mean cost per mg of buprenorphine-naloxone before the first listing of generics was $1.21 CAD in British Columbia, $1.27 CAD in Manitoba, and $0.85 CAD in Saskatchewan. Following the introduction of generics, the cost per mg decreased by $0.22 CAD (95% CI - 0.33 to - 0.10; p = 0.0014) in British Columbia, $0.36 CAD (95% CI - 0.58 to - 0.13; p = 0.004) in Manitoba, and $0.27 CAD (95% CI - 0.50 to - 0.05; p = 0.03) in Saskatchewan. Mean cost per mg decreased by $0.26 CAD (95% CI - 0.38 to - 0.13; p = 0.0004) after a third generic was introduced in British Columbia. Excess costs to public formularies during the 4- to 5-year period prior to the listing of generics were $1,992,558 CAD in British Columbia, $80,876 CAD in Manitoba, and $4130 CAD in Saskatchewan. If buprenorphine-naloxone cost $0.61 CAD (mean cost after the third generic entered) instead of $1.21 CAD per mg during the pre-generics period, public payers in British Columbia could have saved $5,016,220 CAD between 2011 and 2015. CONCLUSIONS: Unmerited 6 years of market exclusivity for brand-name buprenorphine-naloxone in Canada resulted in substantial excess costs. There is an urgent need to implement policies that can help reduce costs for high-priority drugs in Canada.


Assuntos
Combinação Buprenorfina e Naloxona , Marketing , Transtornos Relacionados ao Uso de Opioides , Humanos , Combinação Buprenorfina e Naloxona/economia , Combinação Buprenorfina e Naloxona/uso terapêutico , Canadá , Custos e Análise de Custo , Medicamentos Genéricos , Marketing/legislação & jurisprudência , Metadona/economia , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico , Revisão da Utilização de Seguros
3.
Med Care ; 60(3): 256-263, 2022 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-35026792

RESUMO

BACKGROUND: The association between cost-sharing and receipt of medication for opioid use disorder (MOUD) is unknown. METHODS: We constructed a cohort of 10,513 commercially insured individuals with a new diagnosis of opioid use disorder and information on insurance cost-sharing in a large national deidentified claims database. We examined 4 cost-sharing measures: (1) pharmacy deductible; (2) medical service deductible; (3) pharmacy medication copay; and (4) medical office copay. We measured MOUD (naltrexone, buprenorphine, or methadone) initiation (within 14 d of diagnosis), engagement (second receipt within 34 d of first), and 6-month retention (continuous receipt without 14-d gap). We used multivariable logistic regression to assess the association between cost-sharing and MOUD initiation, engagement, and retention. We calculated total out-of-pocket costs in the 30 days following MOUD initiation for each type of MOUD. RESULTS: Of 10,513 individuals with incident opioid use disorder, 1202 (11%) initiated MOUD, 742 (7%) engaged, and 253 (2%) were retained in MOUD at 6 months. A high ($1000+) medical deductible was associated with a lower odds of initiation compared with no deductible (odds ratio: 0.85, 95% confidence interval: 0.74-0.98). We found no significant associations between other cost-sharing measures for initiation, engagement, or retention. Median initial 30-day out-of-pocket costs ranged from $100 for methadone to $710 for extended-release naltrexone. CONCLUSIONS: Among insurance plan cost-sharing measures, only medical services deductible showed an association with decreased MOUD initiation. Policy and benefit design should consider ways to reduce cost barriers to initiation and retention in MOUD.


Assuntos
Analgésicos Opioides/economia , Seguro Saúde/estatística & dados numéricos , Adesão à Medicação/estatística & dados numéricos , Tratamento de Substituição de Opiáceos/economia , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico , Adolescente , Adulto , Idoso , Buprenorfina/economia , Estudos de Coortes , Custo Compartilhado de Seguro/estatística & dados numéricos , Feminino , Gastos em Saúde/estatística & dados numéricos , Humanos , Masculino , Metadona/economia , Pessoa de Meia-Idade , Naltrexona/economia , Transtornos Relacionados ao Uso de Opioides/economia , Estados Unidos , Adulto Jovem
4.
Pan Afr Med J ; 38: 84, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33889250

RESUMO

Methadone maintenance treatment is reported as cost-effective in treatment of opioid use disorder. Estimated cost of providing methadone varies widely in different regions but there is no data regarding cost of methadone treatment in Kenya. The aim of this study was to estimate the cost of methadone maintenance treatment at a methadone maintenance treatment clinic in Nairobi, Kenya from the perspective of the government, implementing partner and the clients. Data was collected for the period of February 2017 to September 2018 for 700 enrolled clients. The cost of providing methadone treatment was estimated as the sum of salaries, laboratory test, methadone and other commodities costs. The outcome was daily cost of methadone per client. The costs are given in Kenya Shillings (Ksh). The cost of treating one client is approximately Ksh. 149 (US$1.49) per day which amounts to Ksh 4500 (US$ 45) per month. This is from the estimated direct costs such as salaries which accounted for 86.4%, methadone 9.6%, tests and other consumables at 4%. The estimated average dose per patient per day is 60mg.This excludes indirect costs such as capital and set up cost, maintenance cost, training, drug import and distribution and other bills. The findings of this study show that the estimate cost of providing methadone at Nairobi, Kenya is comparable to that in other centers. This can help to inform policy makers on continued provision of methadone treatment in the country.


Assuntos
Custos de Cuidados de Saúde/estatística & dados numéricos , Metadona/economia , Tratamento de Substituição de Opiáceos/economia , Transtornos Relacionados ao Uso de Opioides/reabilitação , Instituições de Assistência Ambulatorial/economia , Análise Custo-Benefício , Custos de Medicamentos , Humanos , Quênia , Metadona/administração & dosagem , Tratamento de Substituição de Opiáceos/métodos , Transtornos Relacionados ao Uso de Opioides/economia , Salários e Benefícios/economia
5.
JAMA Psychiatry ; 78(7): 767-777, 2021 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-33787832

RESUMO

Importance: Opioid use disorder (OUD) is a significant cause of morbidity and mortality in the US, yet many individuals with OUD do not receive treatment. Objective: To assess the cost-effectiveness of OUD treatments and association of these treatments with outcomes in the US. Design and Setting: This model-based cost-effectiveness analysis included a US population with OUD. Interventions: Medication-assisted treatment (MAT) with buprenorphine, methadone, or injectable extended-release naltrexone; psychotherapy (beyond standard counseling); overdose education and naloxone distribution (OEND); and contingency management (CM). Main Outcomes and Measures: Fatal and nonfatal overdoses and deaths throughout 5 years, discounted lifetime quality-adjusted life-years (QALYs), and costs. Results: In the base case, in the absence of treatment, 42 717 overdoses (4132 fatal, 38 585 nonfatal) and 12 660 deaths were estimated to occur in a cohort of 100 000 patients over 5 years, and 11.58 discounted lifetime QALYs were estimated to be experienced per person. An estimated reduction in overdoses was associated with MAT with methadone (10.7%), MAT with buprenorphine or naltrexone (22.0%), and when combined with CM and psychotherapy (range, 21.0%-31.4%). Estimated deceased deaths were associated with MAT with methadone (6%), MAT with buprenorphine or naltrexone (13.9%), and when combined with CM, OEND, and psychotherapy (16.9%). MAT yielded discounted gains of 1.02 to 1.07 QALYs per person. Including only health care sector costs, methadone cost $16 000/QALY gained compared with no treatment, followed by methadone with OEND ($22 000/QALY gained), then by buprenorphine with OEND and CM ($42 000/QALY gained), and then by buprenorphine with OEND, CM, and psychotherapy ($250 000/QALY gained). MAT with naltrexone was dominated by other treatment alternatives. When criminal justice costs were included, all forms of MAT (with buprenorphine, methadone, and naltrexone) were associated with cost savings compared with no treatment, yielding savings of $25 000 to $105 000 in lifetime costs per person. The largest cost savings were associated with methadone plus CM. Results were qualitatively unchanged over a wide range of sensitivity analyses. An analysis using demographic and cost data for Veterans Health Administration patients yielded similar findings. Conclusions and Relevance: In this cost-effectiveness analysis, expanded access to MAT, combined with OEND and CM, was associated with cost-saving reductions in morbidity and mortality from OUD. Lack of widespread MAT availability limits access to a cost-saving medical intervention that reduces morbidity and mortality from OUD. Opioid overdoses in the US likely reached a record high in 2020 because of COVID-19 increasing substance use, exacerbating stress and social isolation, and interfering with opioid treatment. It is essential to understand the cost-effectiveness of alternative forms of MAT to treat OUD.


Assuntos
Tratamento de Substituição de Opiáceos/economia , Transtornos Relacionados ao Uso de Opioides/economia , Adulto , Buprenorfina/economia , Buprenorfina/uso terapêutico , Terapia Combinada , Análise Custo-Benefício , Preparações de Ação Retardada , Feminino , Humanos , Masculino , Metadona/economia , Metadona/uso terapêutico , Pessoa de Meia-Idade , Naloxona/administração & dosagem , Naloxona/economia , Naloxona/uso terapêutico , Overdose de Opiáceos/tratamento farmacológico , Overdose de Opiáceos/economia , Overdose de Opiáceos/prevenção & controle , Transtornos Relacionados ao Uso de Opioides/mortalidade , Transtornos Relacionados ao Uso de Opioides/terapia , Psicoterapia/economia , Psicoterapia/métodos , Resultado do Tratamento
6.
Value Health ; 24(2): 158-173, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33518022

RESUMO

OBJECTIVES: The rapid increase in opioid overdose and opioid use disorder (OUD) over the past 20 years is a complex problem associated with significant economic costs for healthcare systems and society. Simulation models have been developed to capture and identify ways to manage this complexity and to evaluate the potential costs of different strategies to reduce overdoses and OUD. A review of simulation-based economic evaluations is warranted to fully characterize this set of literature. METHODS: A systematic review of simulation-based economic evaluation (SBEE) studies in opioid research was initiated by searches in PubMed, EMBASE, and EbscoHOST. Extraction of a predefined set of items and a quality assessment were performed for each study. RESULTS: The screening process resulted in 23 SBEE studies ranging by year of publication from 1999 to 2019. Methodological quality of the cost analyses was moderately high. The most frequently evaluated strategies were methadone and buprenorphine maintenance treatments; the only harm reduction strategy explored was naloxone distribution. These strategies were consistently found to be cost-effective, especially naloxone distribution and methadone maintenance. Prevention strategies were limited to abuse-deterrent opioid formulations. Less than half (39%) of analyses adopted a societal perspective in their estimation of costs and effects from an opioid-related intervention. Prevention strategies and studies' accounting for patient and physician preference, changing costs, or result stratification were largely ignored in these SBEEs. CONCLUSION: The review shows consistently favorable cost analysis findings for naloxone distribution strategies and opioid agonist treatments and identifies major gaps for future research.


Assuntos
Analgésicos Opioides/efeitos adversos , Overdose de Opiáceos/economia , Transtornos Relacionados ao Uso de Opioides/economia , Custos e Análise de Custo , Humanos , Metadona/economia , Metadona/uso terapêutico , Modelos Econômicos , Naloxona/administração & dosagem , Antagonistas de Entorpecentes/administração & dosagem , Overdose de Opiáceos/epidemiologia , Overdose de Opiáceos/prevenção & controle , Tratamento de Substituição de Opiáceos/economia , Tratamento de Substituição de Opiáceos/métodos , Epidemia de Opioides , Transtornos Relacionados ao Uso de Opioides/epidemiologia , Transtornos Relacionados ao Uso de Opioides/terapia
7.
Drug Alcohol Depend ; 217: 108292, 2020 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-32992151

RESUMO

BACKGROUND: Individuals with opioid use disorder (OUD) who are released from pre-trial detention in jail have a high risk of opioid relapse. While several interventions for OUD initiated during incarceration have been studied, few have had an economic evaluation. As part of a three-group randomized trial, we estimated the cost and cost-effectiveness of a negative urine opioid test. Detainees were assigned to interim methadone (IM) in jail with continued methadone treatment post-release with and without 3 months of post-release patient navigation (PN) compared to an enhanced treatment-as-usual group. METHODS: We implemented a micro-costing approach from the provider's perspective to estimate the cost per participant in jail and over the 12 months post-release from jail. Economic data included jail-based and community-based service utilization, self-reported healthcare utilization and justice system involvement, and administrative arrest records. Our outcome measure is the number of participants with a negative opioid urine test at their 12-month follow-up. We calculated incremental cost-effectiveness ratios (ICERs) for intervention costs only and costs from a societal perspective. RESULTS: The average cost of providing patient navigation services per individual beginning in jail and continuing in the community was $283. We find that IM is dominated by ETAU and IM + PN. Per additional participant with a negative opioid urine test, the ICER for IM + PN including intervention costs only is $91 and $305 including societal costs. CONCLUSIONS: IM + PN is almost certainly the cost-effective choice from both an intervention provider and societal perspective.


Assuntos
Análise Custo-Benefício , Prisões Locais/economia , Metadona/economia , Tratamento de Substituição de Opiáceos/economia , Transtornos Relacionados ao Uso de Opioides/economia , Navegação de Pacientes/economia , Adulto , Analgésicos Opioides/economia , Analgésicos Opioides/uso terapêutico , Análise Custo-Benefício/métodos , Feminino , Humanos , Masculino , Metadona/uso terapêutico , Pessoa de Meia-Idade , Tratamento de Substituição de Opiáceos/métodos , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico , Aceitação pelo Paciente de Cuidados de Saúde , Navegação de Pacientes/métodos , Resultado do Tratamento
8.
Contemp Clin Trials ; 91: 105993, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-32194251

RESUMO

BACKGROUND: North America is facing an unprecedented public health crisis of opioid-related morbidity and mortality, increasingly as a result of the introduction of illicitly manufactured fentanyl into the street drug market. Although the treatment of opioid use disorder (OUD) is a key element in the response to the opioid overdose epidemic, currently available pharmacotherapies (e.g., methadone, buprenorphine) may not be acceptable to or effective in all patients. Available evidence suggests that slow-release oral morphine (SROM) has similar efficacy rates as methadone with respect to promoting abstinence, and with improvements in a number of patient-reported outcomes among persons using heroin. However, little is known about the relative effectiveness and acceptability of SROM compared to methadone in the context of fentanyl use. This study aims to address this research gap. METHODS: pRESTO is a 24-week, open-label, two arm, non-inferiority, randomized controlled trial comparing SROM versus methadone for the treatment of OUD. Participants will be 298 clinically stable, non-pregnant adults with OUD, recruited from outpatient clinics in Vancouver, Canada, where the majority of the illicit opioids are contaminated with fentanyl. The primary outcome is suppression of illicit opioid use, measured by bi-weekly urine drug screens. Secondary outcomes include: treatment retention, medication safety, overdose events, treatment satisfaction, psychological functioning, changes in drug-related problems, changes in quality of life, opioid cravings, other substance use, and cost-effectiveness. DISCUSSION: pRESTO will be among the first studies to evaluate treatment options for individuals primarily using synthetic street opioids, providing important evidence to guide treatment strategies for this population.


Assuntos
Metadona/uso terapêutico , Morfina/uso terapêutico , Entorpecentes/uso terapêutico , Tratamento de Substituição de Opiáceos/métodos , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico , Adulto , Análise Custo-Benefício , Preparações de Ação Retardada , Overdose de Drogas/epidemiologia , Estudos de Equivalência como Asunto , Feminino , Fentanila/toxicidade , Humanos , Masculino , Metadona/economia , Pessoa de Meia-Idade , Morfina/administração & dosagem , Morfina/economia , Entorpecentes/administração & dosagem , Entorpecentes/economia , Satisfação do Paciente , Qualidade de Vida , Adulto Jovem
9.
PLoS One ; 15(3): e0229787, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32126120

RESUMO

OBJECTIVE: To identify the geographic, organisational, and payment correlates of buprenorphine and methadone treatment among substance abuse treatment (SAT) providers. METHODS: Secondary analyses of the National Survey of Substance Abuse Treatment Services (NSSATS) from 2007-16 were conducted. We provide bivariate descriptive statistics regarding substance abuse treatment services which offered buprenorphine and methadone treatment from 2007-16. Using multiple logistic regression, we regressed geographic, organisational, and payment correlates on buprenorphine and methadone treatment. RESULTS: Buprenorphine is increasingly offered at SAT facilities though uptake remains comparatively low outside of the northeast. SAT facilities run by tribal governments or Indian Health Service which offer buprenorphine remain low compared to privately operated SAT facilities (AOR = 0.528). The odds of offering buprenorphine among facilities offering free or no charge treatment (AOR = 0.838) or a sliding fee scale (AOR = 0.464) was lower. SAT facilities accepting Medicaid payments showed higher odds of offering methadone treatment (AOR = 2.035). CONCLUSIONS: Greater attention towards the disparities in provision of opioid agonist therapies is warranted, especially towards the reasons why uptake has been moderate among civilian providers. Additionally, the care needs of Native Americans facing opioid-related use disorders bears further scrutiny.


Assuntos
Antagonistas de Entorpecentes/uso terapêutico , Tratamento de Substituição de Opiáceos/estatística & dados numéricos , Epidemia de Opioides/prevenção & controle , Transtornos Relacionados ao Uso de Opioides/reabilitação , Centros de Tratamento de Abuso de Substâncias/estatística & dados numéricos , Analgésicos Opioides/efeitos adversos , Buprenorfina/economia , Buprenorfina/uso terapêutico , Efeitos Psicossociais da Doença , Geografia , Disparidades em Assistência à Saúde/economia , Disparidades em Assistência à Saúde/organização & administração , Disparidades em Assistência à Saúde/estatística & dados numéricos , Humanos , Medicaid/economia , Medicaid/estatística & dados numéricos , Metadona/economia , Metadona/uso terapêutico , Antagonistas de Entorpecentes/economia , Tratamento de Substituição de Opiáceos/economia , Tratamento de Substituição de Opiáceos/tendências , Transtornos Relacionados ao Uso de Opioides/economia , Transtornos Relacionados ao Uso de Opioides/epidemiologia , Transtornos Relacionados ao Uso de Opioides/etiologia , Centros de Tratamento de Abuso de Substâncias/economia , Centros de Tratamento de Abuso de Substâncias/organização & administração , Inquéritos e Questionários/estatística & dados numéricos , Estados Unidos/epidemiologia
10.
Subst Abuse Treat Prev Policy ; 14(1): 57, 2019 12 16.
Artigo em Inglês | MEDLINE | ID: mdl-31842942

RESUMO

BACKGROUND: Opioid Use Disorder (OUD) is a substance use disorder with a chronic course associated with comorbid mental and somatic disorders, a high burden of psychosocial problems and opioid maintenance treatment (OMT) as a standard treatment. In the US, OUD imposes a significant economic burden on society, with annual societal costs estimated at over 55 billion dollars. Surprisingly, in Europe and especially in Germany, there is currently no detailed information on the healthcare costs of patients with OUD. The goal of the present research is to gather cost information about OUD patients in OMT with a focus on maintenance medication and relapses. METHODS: We analysed health claims data of four million persons covered by statutory health insurance in Germany, applying a cost-of-illness approach and aimed at examining the direct costs of OMT patients in Germany. Patients with an ICD-10 code F11.2 and at least one claim of an OMT medication were stratified into the treatment groups buprenorphine, methadone or levomethadone, based on the first prescription in each of the follow-up years. Costs were stratified for years with and without relapses. Group comparisons were performed with ANOVA. RESULTS: We analysed 3165 patient years, the total annual sickness funds costs were on average 7470 € per year and patient. Comparing costs of levomethadone (8400 €, SD: 11,080 €), methadone (7090 €, SD: 10,900 €) and buprenorphine (6670 €, SD: 7430 €) revealed significant lower costs of buprenorphine compared to levomethadone (p < 0.0001). In years with relapses, costs were higher than in years without relapses (8178 € vs 7409 €; SD: 11,622, resp. 10,378 €). In years with relapses, hospital costs were the major cost driver. CONCLUSIONS: The present study shows the costs of OUD patients in OMT for the first time with a German dataset. Healthcare costs for patients with an OUD in OMT are associated with more than two times the cost of an average German patients. Preventing relapses might have significant impact on costs. Patients in different OMT were dissimilar which may have affected the cost differences.


Assuntos
Custos de Cuidados de Saúde/estatística & dados numéricos , Tratamento de Substituição de Opiáceos/economia , Transtornos Relacionados ao Uso de Opioides/economia , Adulto , Buprenorfina/economia , Buprenorfina/uso terapêutico , Efeitos Psicossociais da Doença , Feminino , Alemanha/epidemiologia , Humanos , Masculino , Metadona/economia , Metadona/uso terapêutico , Tratamento de Substituição de Opiáceos/estatística & dados numéricos , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico , Transtornos Relacionados ao Uso de Opioides/epidemiologia
11.
Obstet Gynecol ; 134(5): 921-931, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31599845

RESUMO

OBJECTIVE: To estimate whether methadone, buprenorphine, or detoxification treatment is the most cost-effective approach to the management of opioid use disorder (OUD) during pregnancy. METHODS: We created a decision analytic model that compared the cost effectiveness (eg, the marginal cost of the strategy in U.S. dollars divided by the marginal effectiveness of the strategy, measured in quality-adjusted life-years [QALYs]) of initiation of methadone, buprenorphine, or detoxification in treatment of OUD during pregnancy. Probabilities, costs, and utilities were estimated from the existing literature. Incremental cost-effective ratios for each strategy were calculated, and a ratio of $100,000 per QALY was used to define cost effectiveness. One-way sensitivity analyses and a Monte Carlo probabilistic sensitivity analysis were performed. RESULTS: Under base assumptions, initiation of buprenorphine was more effective at a lower cost than either methadone or detoxification and thus was the dominant strategy. Buprenorphine was no longer cost effective if the cost of methadone was 8% less than the base-case estimate ($1,646/month) or if the overall costs of detoxification were 121% less than the base-case estimate for the detoxification cost multiplier, which was used to increase the values of both inpatient and outpatient management of detoxification by a factor of 2. Monte Carlo analyses revealed that buprenorphine was the cost-effective strategy in 70.5% of the simulations. Direct comparison of buprenorphine with methadone demonstrated that buprenorphine was below the incremental cost-effective ratio in 95.1% of simulations; direct comparison between buprenorphine and detoxification demonstrated that buprenorphine was below the incremental cost-effective ratio in 45% of simulations. CONCLUSION: Under most circumstances, we estimate that buprenorphine is the cost-effective strategy when compared with either methadone or detoxification as treatment for OUD during pregnancy. Nonetheless, the fact that buprenorphine was not the cost-effective strategy in almost one out of three of simulations suggests that the robustness of our model may be limited and that further evaluation of the cost-effective approach to the management of OUD during pregnancy is needed.


Assuntos
Buprenorfina , Metadona , Tratamento de Substituição de Opiáceos , Transtornos Relacionados ao Uso de Opioides/terapia , Complicações na Gravidez/terapia , Buprenorfina/economia , Buprenorfina/uso terapêutico , Análise Custo-Benefício , Técnicas de Apoio para a Decisão , Feminino , Humanos , Metadona/economia , Metadona/uso terapêutico , Antagonistas de Entorpecentes/economia , Antagonistas de Entorpecentes/uso terapêutico , Tratamento de Substituição de Opiáceos/economia , Tratamento de Substituição de Opiáceos/métodos , Gravidez , Cuidado Pré-Natal/economia , Cuidado Pré-Natal/métodos
12.
Int J Drug Policy ; 74: 84-89, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31585318

RESUMO

BACKGROUND: Evaluation of costs and benefits of substance use treatment programs through a standard economic framework is necessary for optimal policy making. However, drug policy making is seldom supported by economic justification. Measurement of willingness to pay is a tool to provide better understanding of intangible substance use treatment outcomes and to help a balanced policy in treatment of substance use between maintenance treatment and abstinence-based approach. AIM: To assess the reciprocal association between economic indexes and attitudes about substance use and its treatment as indicators of tendency toward the two different treatment. METHOD: Willingness to pay for treatment was measured by contingency valuation method among 109 treatment cost payers of which 78 subjects were from outpatient methadone maintenance clinics and 31 were from abstinence-based residential facilities. To analyze predictors of willingness to pay, we used income to capture heterogeneity of purchasing power among subjects. Further, we checked bivariate correlation of different attitudes of cost payers with willingness to pay. In the next step using backward regression equation we tried to reach the best specification of the model. Selected variables include cost payers' attitudes toward substance use and its treatment, effectiveness of treatment, social attitude toward the condition of substance use in Iran, fairness of treatment prices, and government financial support for addiction treatment. RESULTS: In methadone maintenance clinics the payers' income had a pivotal role in determining willingness to pay for substance use treatment by 50% (p<0.001 ). On the other hand, in abstinence-based residential facilities positive attitude toward substance use (61%, p<0.01) was the major direct determinant of willingness to pay for treatment. Attitude to public financial support for substance use treatment (55%, p<0.01 ) and consumption experience (45%, p<0.01 ) showed an inverse association with WTP in regression equation. CONCLUSION: This study expanded the understanding of the nature of payment in different substance use treatment modalities. The suggestion to policy makers is that before taking position on different types of treatment services, it is necessary to pay attention to factors that determine values cost payers put on treatment. In other words, economic indexes, payers' views about substance use and its treatment, and their opinion about effectiveness of substance use treatment programs may jeopardize the success of the policy.


Assuntos
Metadona/administração & dosagem , Tratamento de Substituição de Opiáceos/economia , Centros de Tratamento de Abuso de Substâncias/economia , Transtornos Relacionados ao Uso de Substâncias/reabilitação , Adulto , Feminino , Financiamento Pessoal , Humanos , Renda , Irã (Geográfico) , Masculino , Metadona/economia , Pessoa de Meia-Idade , Política Pública , Transtornos Relacionados ao Uso de Substâncias/economia
13.
J Subst Abuse Treat ; 104: 15-21, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31370980

RESUMO

Medication-assisted treatment (MAT) with methadone or buprenorphine has been shown to be more effective at reducing the use of illicit opioids, the risk of drug-related overdose, and overall healthcare costs, on average, compared to abstinence-based addiction treatments for individuals with an opioid use disorder (OUD). Individuals who are adherent to MAT are more likely to experience positive outcomes. We used physical and behavioral Medicaid claims data of individuals newly treated with methadone (n = 212) and buprenorphine (n = 972) to examine the overall predictors of adherence, differences in adherence to each medication, the relationship between adherence and ED nonfatal drug-related overdose, and differences in total cost of care between the two medications. We found that older individuals and women had significantly lower risk of non-adherence. At six months, only 3.6% of individuals who were adherent to either treatment experienced a nonfatal drug-related overdose in the ED, compared to 13.2% of individuals who were non-adherent. We found no significant difference between methadone and buprenorphine on nonfatal drug-related overdose. Non-adherence to methadone was associated with a significant increase in total cost of care. Implications for how these results could be used to improve the overall impact of MAT are discussed.


Assuntos
Buprenorfina , Serviço Hospitalar de Emergência , Custos de Cuidados de Saúde , Medicaid , Metadona , Entorpecentes , Tratamento de Substituição de Opiáceos , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico , Transtornos Relacionados ao Uso de Opioides/economia , Avaliação de Resultados em Cuidados de Saúde , Cooperação do Paciente , Adulto , Buprenorfina/economia , Buprenorfina/uso terapêutico , Serviço Hospitalar de Emergência/economia , Serviço Hospitalar de Emergência/estatística & dados numéricos , Feminino , Custos de Cuidados de Saúde/estatística & dados numéricos , Humanos , Masculino , Medicaid/economia , Medicaid/estatística & dados numéricos , Metadona/economia , Metadona/uso terapêutico , Pessoa de Meia-Idade , Entorpecentes/economia , Entorpecentes/uso terapêutico , Tratamento de Substituição de Opiáceos/economia , Tratamento de Substituição de Opiáceos/estatística & dados numéricos , Avaliação de Resultados em Cuidados de Saúde/estatística & dados numéricos , Cooperação do Paciente/estatística & dados numéricos , Estados Unidos
14.
J Manag Care Spec Pharm ; 25(6): 630-634, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-31134864

RESUMO

DISCLOSURES: Funding for this summary was contributed by the Laura and John Arnold Foundation, Blue Shield of California, and California Health Care Foundation to the Institute for Clinical and Economic Review (ICER), an independent organization that evaluates the evidence on the value of health care interventions. ICER's annual policy summit is supported by dues from Aetna, AHIP Anthem, Blue Shield of California, CVS Caremark, Express Scripts, Harvard Pilgrim Health Care, Cambia Health Solutions, United Healthcare, Kaiser Permanente, Premera Blue Cross, AstraZeneca, Genentech, GlaxoSmithKline, Johnson & Johnson, Merck, National Pharmaceutical Council, Prime Therapeutics, Sanofi, Spark Therapeutics, Health Care Service Corporation, Editas, Alnylam, Regeneron, Mallinkrodt, Biogen, HealthPartners, and Novartis. Otuonye, Kumar, and Pearson are ICER employees. Banken received consulting fees from ICER for work on this report.


Assuntos
Analgésicos Opioides/uso terapêutico , Antagonistas de Entorpecentes/uso terapêutico , Tratamento de Substituição de Opiáceos/métodos , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico , Analgésicos Opioides/economia , Buprenorfina/economia , Buprenorfina/uso terapêutico , Análise Custo-Benefício , Preparações de Ação Retardada/uso terapêutico , Humanos , Metadona/economia , Metadona/uso terapêutico , Modelos Econômicos , Naltrexona/economia , Naltrexona/uso terapêutico , Antagonistas de Entorpecentes/economia , Tratamento de Substituição de Opiáceos/economia , Transtornos Relacionados ao Uso de Opioides/economia , Transtornos Relacionados ao Uso de Opioides/epidemiologia , Políticas , Resultado do Tratamento , Estados Unidos/epidemiologia
15.
J Subst Abuse Treat ; 94: 81-90, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-30243422

RESUMO

Methadone maintenance treatment has proven effectiveness in the treatment of opioid use disorder, but significant barriers remain to treatment retention. In a randomized clinical trial, 300 newly-admitted methadone patients were randomly assigned to patient-centered methadone (PCM) v. treatment-as-usual (TAU). In PCM, participants were treated under revised program rules which permitted voluntary attendance at counseling and other changes focused on reducing involuntary discharge, and different staff roles which shifted disciplinary responsibility from the participant's counselor to the supervisor. The study found no significant differences in treatment retention, measures of opioid use, or other patient outcomes. This paper employs an activity-based costing approach to estimate the cost and cost-effectiveness of the two study conditions. We found that service use and costs were similar between PCM and TAU. Specifically, the average cost for PCM patients was $2396 compared to $2292 for standard methadone, while the average length of stay was 2 weeks longer for PCM patients. Incremental cost-effectiveness ratios (ICER) for self-reported heroin use, opioid positive urine screens, and meeting DSM-IV criteria for opioid dependence were mixed, with TAU achieving non-significantly better outcomes at lower treatment episode costs (i.e., economically dominating) for opioid positive urine screens. PCM patients reported slightly more days abstinent from heroin and fewer meet the opioid dependence criteria. While these differences are small and not statistically significant, we can still examine the cost-effectiveness implications. For days, abstinent from heroin, the ICER was $242 for one additional day of abstinence, however, there was notable uncertainty around this estimate. For opioid dependence criteria, the ICER was $1160 for a one-percentage point increase in the probability that a participant no longer met criteria for opioid dependence at follow-up. This economic study finds that patient choice concepts can be introduced into methadone treatment without significant impacts on costs or patient outcomes.


Assuntos
Metadona/administração & dosagem , Tratamento de Substituição de Opiáceos/métodos , Transtornos Relacionados ao Uso de Opioides/reabilitação , Assistência Centrada no Paciente/métodos , Adulto , Analgésicos Opioides/administração & dosagem , Analgésicos Opioides/economia , Comportamento de Escolha , Análise Custo-Benefício , Seguimentos , Custos de Cuidados de Saúde , Dependência de Heroína/reabilitação , Humanos , Tempo de Internação , Metadona/economia , Tratamento de Substituição de Opiáceos/economia , Assistência Centrada no Paciente/economia , Centros de Tratamento de Abuso de Substâncias/economia , Fatores de Tempo , Resultado do Tratamento
16.
Am J Drug Alcohol Abuse ; 44(6): 611-618, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30024783

RESUMO

BACKGROUND: The US has the highest incarceration rate in the world and spends $40-$80 billion to house inmates per year. It is well-known that a significant correlation is present between substance use and crime, especially over recent years as opioid use disorder (OUD) has grown exponentially. To mitigate OUD, methadone maintenance treatment (MMT) has demonstrated effectiveness in numerous randomized and quasi-experimental studies. A potentially fruitful environment for MMT is correctional facilities, particularly short-term facilities, such as city and county jails. However, little is known about the economic implications of MMT within correctional facilities. OBJECTIVE: The aim of the present study was to estimate the economic costs of jail-based MMT using data from a novel, established MMT program located within a large urban jail in New Mexico. METHODS: Data were collected using administrative records and by interviewing program administrators using a modified version of the Drug Abuse Treatment Cost Analysis Program (DATCAP). Both sensitivity analysis and cost-structure analysis were conducted to gauge the robustness of the findings. RESULTS: The average (per patient) weekly cost of MMT is $115 and the total treatment cost for an average treatment episode is $689. These costs are generally in-line with non-jail-based MMT programs of similar size. Weekly cost estimates range from $86 to $185 depending on the size of the treatment facility, with larger programs exhibiting lower per-patient costs. CONCLUSION: Results provide a valuable economic benchmark to policy makers, criminal justice officials, and program administrators considering establishing and/or expanding MMT in jail settings.


Assuntos
Analgésicos Opioides/economia , Metadona/economia , Tratamento de Substituição de Opiáceos/economia , Transtornos Relacionados ao Uso de Opioides/economia , Prisões , Analgésicos Opioides/uso terapêutico , Análise Custo-Benefício , Custos de Cuidados de Saúde , Humanos , Metadona/uso terapêutico , Tratamento de Substituição de Opiáceos/métodos , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico
17.
Harm Reduct J ; 15(1): 28, 2018 05 23.
Artigo em Inglês | MEDLINE | ID: mdl-29792191

RESUMO

BACKGROUND: Mexico recently enacted drug policy reform to decriminalize possession of small amounts of illicit drugs and mandated that police refer identified substance users to drug treatment. However, the economic implications of drug treatment expansion are uncertain. We estimated the costs of opioid substitution therapy (OST) provision in Tijuana, Mexico, where opioid use and HIV are major public health concerns. METHODS: We adopted an economic health care provider perspective and applied an ingredients-based micro-costing approach to quantify the average monthly cost of OST (methadone maintenance) provision at two providers (one private and one public) in Tijuana, Mexico. Costs were divided by type of input (capital, recurrent personnel and non-personnel). We defined "delivery cost" as all costs except for the methadone and compared total cost by type of methadone (powdered form or capsule). Cost data were obtained from interviews with senior staff and review of expenditure reports. Service provision data were obtained from activity logs and senior staff interviews. Outcomes were cost per OST contact and cost per person month of OST. We additionally collected information on patient charges for OST provision from published rates. RESULTS: The total cost per OST contact at the private and public sites was $3.12 and $5.90, respectively, corresponding to $95 and $179 per person month of OST. The costs of methadone delivery per OST contact were similar at both sites ($2.78 private and $3.46 public). However, cost of the methadone itself varied substantially ($0.34 per 80 mg dose [powder] at the private site and $2.44 per dose [capsule] at the public site). Patients were charged $1.93-$2.66 per methadone dose. CONCLUSIONS: The cost of OST provision in Mexico is consistent with other upper-middle income settings. However, evidenced-based (OST) drug treatment facilities in Mexico are still unaffordable to most people who inject drugs.


Assuntos
Tratamento de Substituição de Opiáceos/economia , Transtornos Relacionados ao Uso de Opioides/economia , Analgésicos Opioides/economia , Analgésicos Opioides/uso terapêutico , Custos e Análise de Custo , Atenção à Saúde/economia , Terapia Diretamente Observada/economia , Honorários e Preços/estatística & dados numéricos , Redução do Dano , Humanos , Metadona/economia , Metadona/uso terapêutico , México , Transtornos Relacionados ao Uso de Opioides/reabilitação , Setor Privado/economia , Setor Público/economia , Centros de Tratamento de Abuso de Substâncias/economia
18.
Addiction ; 113(7): 1264-1273, 2018 07.
Artigo em Inglês | MEDLINE | ID: mdl-29589873

RESUMO

BACKGROUND AND AIMS: Previous research has found diacetylmorphine, delivered under supervision, to be cost-effective in the treatment of severe opioid use disorder, but diacetylmorphine is not available in many settings. The Study to Assess Long-term Opioid Maintenance Effectiveness (SALOME) randomized controlled trial provided evidence that injectable hydromorphone is non-inferior to diacetylmorphine. The current study aimed to compare the cost-effectiveness of hydromorphone directly with diacetylmorphine and indirectly with methadone maintenance treatment. DESIGN: A within-trial analysis was conducted using the patient level data from the 6-month, double-blind, non-inferiority SALOME trial. A life-time analysis extrapolated costs and outcomes using a decision analytical cohort model. The model incorporated data from a previous trial to include an indirect comparison to methadone maintenance. SETTING: A supervised clinic in Vancouver, British Columbia, Canada. PARTICIPANTS: A total of 202 long-term street opioid injectors who had at least two attempts at treatment, including one with methadone (or other substitution), were randomized to hydromorphone (n = 100) or diacetylmorphine (n = 102). MEASUREMENTS: We measured the utilization of drugs, visits to health professionals, hospitalizations, criminal activity, mortality and quality of life. This enabled us to estimate incremental costs, quality-adjusted life years (QALYs) and cost-effectiveness ratios from a societal perspective. Sensitivity analyses considered different sources of evidence, assumptions and perspectives. FINDINGS: The within-trial analysis found hydromorphone provided similar QALYs to diacetylmorphine [0.377, 95% confidence interval (CI) = 0.361-0.393 versus 0.375, 95% CI = 0.357-0.391], but accumulated marginally greater costs [$49 830 ($28 401-73 637) versus $34 320 ($21 780-55 998)]. The life-time analysis suggested that both diacetylmorphine and hydromorphone provide more benefits than methadone [8.4 (7.4-9.5) and 8.3 (7.2-9.5) versus 7.4 (6.5-8.3) QALYs] at lower cost [$1.01 million ($0.6-1.59 million) and $1.02 million ($0.72-1.51 million) versus $1.15 million ($0.71-1.84 million)]. CONCLUSIONS: In patients with severe opioid use disorder enrolled into the SALOME trial, injectable hydromorphone provided similar outcomes to injectable diacetylmorphine. Modelling outcomes during a patient's life-time suggested that injectable hydromorphone might provide greater benefit than methadone alone and may be cost-saving, with drug costs being offset by costs saved from reduced involvement in criminal activity.


Assuntos
Hidromorfona/uso terapêutico , Entorpecentes/uso terapêutico , Tratamento de Substituição de Opiáceos/métodos , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico , Colúmbia Britânica , Análise Custo-Benefício , Crime/economia , Crime/estatística & dados numéricos , Método Duplo-Cego , Estudos de Equivalência como Asunto , Serviços de Saúde/economia , Serviços de Saúde/estatística & dados numéricos , Heroína/economia , Heroína/uso terapêutico , Hospitalização/economia , Hospitalização/estatística & dados numéricos , Humanos , Hidromorfona/economia , Metadona/economia , Metadona/uso terapêutico , Mortalidade , Entorpecentes/economia , Tratamento de Substituição de Opiáceos/economia , Transtornos Relacionados ao Uso de Opioides/economia , Anos de Vida Ajustados por Qualidade de Vida , Ensaios Clínicos Controlados Aleatórios como Assunto , Índice de Gravidade de Doença
19.
Drug Alcohol Depend ; 185: 411-420, 2018 04 01.
Artigo em Inglês | MEDLINE | ID: mdl-29477574

RESUMO

BACKGROUND: We evaluated the cost-effectiveness of a hepatitis C (HCV) screening and active linkage to care intervention in US methadone maintenance treatment (MMT) patients using data from a randomized trial conducted in New York City and San Francisco. METHODS: We used a decision analytic model to compare 1) no intervention; 2) HCV screening and education (control); and 3) HCV screening, education, and care coordination (active linkage intervention). We also explored an alternative strategy wherein HCV/HIV co-infected participants linked elsewhere. Trial data include population characteristics (67% male, mean age 48, 58% HCV infected) and linkage rates. Data from published sources include treatment efficacy and HCV re-infection risk. We projected quality-adjusted life years (QALYs) and lifetime medical costs using an established model of HCV (HEP-CE). Incremental cost-effectiveness ratios (ICERs) are in 2015 US$/QALY discounted 3% annually. RESULTS: The control strategy resulted in a projected 35% linking to care within 6 months and 31% achieving sustained virologic response (SVR). The intervention resulted in 60% linking and 54% achieving SVR with an ICER of $24,600/QALY compared to no intervention from the healthcare sector perspective and was a more efficient use of resources than the control strategy. The intervention had an ICER of $76,500/QALY compared to the alternative strategy. From a societal perspective, the intervention had a net monetary benefit of $511,000-$975,600. CONCLUSIONS: HCV care coordination interventions that include screening, education and active linkage to care in MMT settings are likely cost-effective at a conventional $100,000/QALY threshold for both HCV mono-infected and HIV co-infected patients.


Assuntos
Análise Custo-Benefício/métodos , Hepatite C Crônica/diagnóstico , Hepatite C Crônica/economia , Programas de Rastreamento/economia , Metadona/economia , Tratamento de Substituição de Opiáceos/economia , Adulto , Antivirais/economia , Antivirais/uso terapêutico , Coinfecção , Feminino , Hepatite C Crônica/epidemiologia , Humanos , Masculino , Programas de Rastreamento/métodos , Metadona/uso terapêutico , Pessoa de Meia-Idade , Cidade de Nova Iorque/epidemiologia , Tratamento de Substituição de Opiáceos/métodos , Anos de Vida Ajustados por Qualidade de Vida , São Francisco/epidemiologia , Resultado do Tratamento , Estados Unidos/epidemiologia
20.
J Med Econ ; 21(4): 406-415, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-29320915

RESUMO

OBJECTIVE: Opioid use disorder (OUD) can be managed with medication assisted therapy (MAT) (methadone [MET], buprenorphine [BUP], or extended-release naltrexone [XR-NTX]) or counseling alone (non-pharmacological therapy [NPT]). The objective of this study was to evaluate healthcare resource utilization and costs associated with XR-NTX compared with alternative treatments for opioid dependence. METHODS: Adults with a diagnosis of opioid dependence who initiated treatment with XR-NTX, BUP, MET, or NPT between January 1, 2011 and December 31, 2014 were identified in the Truven Health MarketScan Commercial administrative claims database. Healthcare resource utilization, costs (inpatient [IP], emergency department [ED], outpatient [OP], and pharmacy) and adherence were evaluated for each cohort during 12-month baseline and follow-up periods. RESULTS: A total of 29,235 patients were included in the analysis; 1,041, 20,566, 745, and 6,883 received XR-NTX, BUP, MET, and NPT, respectively. Patients in the XR-NTX cohort were significantly younger and had more comorbidities compared with the other cohorts. Patients in the XR-NTX group had the largest percentage decrease in IP and ED utilization and costs from baseline to follow-up. OP and pharmacy costs increased significantly from baseline to follow-up for all cohorts. Overall, there was no significant change in total healthcare costs for the XR-NTX group, whereas the costs increased significantly for other groups (BUP = +43%, MET = +47.7%, NPT = +38.8%). CONCLUSIONS: Healthcare resource utilization and costs increased from baseline to follow-up in BUP, MET, and NPT patients, whereas patients receiving XR-NTX experienced no such increase. This analysis suggests there may be economic value in the use of XR-NTX for OUD.


Assuntos
Recursos em Saúde/economia , Recursos em Saúde/estatística & dados numéricos , Transtornos Relacionados ao Uso de Opioides/economia , Transtornos Relacionados ao Uso de Opioides/terapia , Adulto , Fatores Etários , Buprenorfina/economia , Buprenorfina/uso terapêutico , Comorbidade , Aconselhamento/economia , Aconselhamento/métodos , Preparações de Ação Retardada , Gastos em Saúde/estatística & dados numéricos , Humanos , Masculino , Metadona/economia , Metadona/uso terapêutico , Pessoa de Meia-Idade , Modelos Econométricos , Naltrexona/economia , Naltrexona/uso terapêutico , Antagonistas de Entorpecentes/economia , Antagonistas de Entorpecentes/uso terapêutico , Tratamento de Substituição de Opiáceos/economia , Tratamento de Substituição de Opiáceos/métodos , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico , Estudos Retrospectivos
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