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1.
J Med Econ ; 23(8): 894-901, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32347754

RESUMO

Aims: To describe the real-world economic burden of patients with anaplastic lymphoma kinase-positive (ALK+) non-small cell lung cancer (NSCLC) treated with post-crizotinib, second-line ALK inhibitor therapy.Materials and methods: Retrospective analysis using data from US Optum: Clinformatics Data Mart administrative claims database. Adult patients with ALK + NSCLC treated with ceritinib or alectinib as second-line ALK inhibitors between 1 January 2011 and 30 September 2017 were included. Healthcare costs and resource utilization for up to 1 year of therapy were calculated on a per-patient-per-month (PPPM) basis and stratified by presence or absence of brain metastases (BM). Multivariate regression analysis was performed to identify factors associated with costs. Top ten cost drivers of non-inpatient procedure costs were recorded.Results: One hundred and twelve patients received second-line ALK inhibitors. Total mean PPPM healthcare costs were $23,984 for all patients receiving up to 1 year of post-crizotinib, second-line ALK inhibitor therapy. Total mean PPPM costs for patients with BM on or prior to post-crizotinib, second-line ALK inhibitor therapy were 1.37-times as high as those for patients without BM (p = 0.0406). Mean PPPM outpatient visits and inpatient hospitalization stays were higher for patients with BM versus no BM. The main cost drivers for non-inpatient procedures were radiation therapy, medications, and diagnostic radiology.Limitations: Analyses did not include newer ALK-directed therapies. BM development after the index date (defined as the date of the first claim for a second-line ALK inhibitor) may have been misclassified as non-BM. Findings may not be generalizable to patients with no health insurance coverage.Conclusions: Treatment of patients with ALK + NSCLC with ceritinib or alectinib as post-crizotinib, second-line ALK inhibitor therapy represents a high economic burden. Healthcare costs and resource utilization were significantly higher for patients with ALK + NSCLC with BM versus no BM.


Assuntos
Quinase do Linfoma Anaplásico/antagonistas & inibidores , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Gastos em Saúde/estatística & dados numéricos , Neoplasias Pulmonares/tratamento farmacológico , Inibidores de Proteínas Quinases/economia , Inibidores de Proteínas Quinases/uso terapêutico , Adulto , Fatores Etários , Idoso , Neoplasias Encefálicas/secundário , Carbazóis/economia , Carbazóis/uso terapêutico , Carcinoma Pulmonar de Células não Pequenas/patologia , Comorbidade , Efeitos Psicossociais da Doença , Crizotinibe/economia , Crizotinibe/uso terapêutico , Feminino , Recursos em Saúde/economia , Serviços de Saúde/economia , Humanos , Revisão da Utilização de Seguros , Neoplasias Pulmonares/patologia , Masculino , Pessoa de Meia-Idade , Aceitação pelo Paciente de Cuidados de Saúde/estatística & dados numéricos , Piperidinas/economia , Piperidinas/uso terapêutico , Pirimidinas/economia , Pirimidinas/uso terapêutico , Análise de Regressão , Características de Residência , Estudos Retrospectivos , Fatores Sexuais , Fatores Socioeconômicos , Sulfonas/economia , Sulfonas/uso terapêutico
2.
Clin Drug Investig ; 40(2): 183-189, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31820329

RESUMO

BACKGROUND: Crizotinib, ceritinib, and alectinib improved survival in patients with anaplastic lymphoma kinase (ALK) arrangement non-small-cell lung cancer (NSCLC); however, the long-term economic outcomes of using ceritinib and alectinib versus crizotinib are still unclear. OBJECTIVE: This analysis aimed to evaluate the cost effectiveness of ceritinib and alectinib versus crizotinib in the Chinese healthcare setting. METHODS: A Markov model was developed to project the economic and health outcomes for the treatment of advanced NSCLC with ceritinib, alectinib or crizotinib. A network meta-analysis was performed to calculate the hazard ratios of ceritinib and alectinib versus crizotinib by pooling published trials. Cost and utility values were obtained from the literature, and one-way and probabilistic sensitivity analyses were carried out to determine the robustness of the model outcomes. The primary outputs included total cost, life-years (LYs), quality-adjusted LYs (QALYs), and incremental cost-effectiveness ratio (ICER). RESULTS: Treatment with alectinib and ceritinib yielded an additional 1.00 and 1.09 QALYs and incremental costs of $62,232 and $15,165, resulting in an ICER of $62,231 and $13,905 per QALY compared with crizotinib, respectively. Parameters related to drug costs and progression-free survival were the main drivers of the model outcomes. From the probabilistic sensitivity analysis, ceritinib and alectinib had a 99.9% and 0% probability of being cost effective, respectively, at a willingness-to-pay threshold of US$28,410/QALY. CONCLUSIONS: Our results indicate that compared with crizotinib and alectinib, ceritinib is a cost-effective option for treatment-naïve patients with ALK-positive advanced NSCLC.


Assuntos
Quinase do Linfoma Anaplásico/antagonistas & inibidores , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Neoplasias Pulmonares/tratamento farmacológico , Inibidores de Proteínas Quinases/uso terapêutico , Quinase do Linfoma Anaplásico/análise , Carbazóis/economia , Carbazóis/uso terapêutico , Carcinoma Pulmonar de Células não Pequenas/enzimologia , Análise Custo-Benefício , Crizotinibe/economia , Crizotinibe/uso terapêutico , Custos de Medicamentos , Humanos , Piperidinas/economia , Piperidinas/uso terapêutico , Pirimidinas/economia , Pirimidinas/uso terapêutico , Anos de Vida Ajustados por Qualidade de Vida , Sulfonas/economia , Sulfonas/uso terapêutico
3.
Adv Ther ; 36(11): 3047-3058, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31576479

RESUMO

INTRODUCTION: A trial-based assessment was completed to evaluate the cost-effectiveness of ceritinib as a first-line treatment for advanced non-small cell lung cancer (NSCLC) with rearrangement of anaplastic lymphoma kinase. METHODS: Based on the disease situation of advanced NSCLC, a Markov model was constructed to estimate the costs and benefits of ceritinib and platinum-based chemotherapy. The cost information and health utilities were obtained from published literature. The incremental cost-effectiveness ratio was calculated. The stability of the model was verified by sensitivity analyses. RESULTS: The base case analysis results indicated that compared with platinum-based chemotherapy, ceritinib therapy would increase benefits in a 5-, 10- and 15-year time horizon, with extra costs of $230,661.61, $149,321.52 and $136,414.43 per quality-adjusted life-year gained, respectively. The most sensitive parameter in the model analysis was the cost of ceritinib. Probabilistic sensitivity analysis suggested that at the current price of ceritinib, the chance of ceritinib being cost-effective was 0 at the willingness-to-pay threshold of $27,142.85 per quality-adjusted life-year (three times the per capita gross domestic product of China). CONCLUSION: As a first-line treatment for advanced NSCLC with rearrangement of anaplastic lymphoma kinase, ceritinib is unlikely to be cost-effective at the current price from the Chinese healthcare perspective. To meet the treatment demands of patients, it may be a better option to reduce the price or provide appropriate drug assistance policies.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Carcinoma Pulmonar de Células não Pequenas/economia , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/economia , Pirimidinas/economia , Sulfonas/economia , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , China , Análise Custo-Benefício , Intervalo Livre de Doença , Humanos , Modelos Econômicos , Platina , Pirimidinas/administração & dosagem , Anos de Vida Ajustados por Qualidade de Vida , Sulfonas/administração & dosagem
4.
Pharmacoeconomics ; 37(5): 645-654, 2019 05.
Artigo em Inglês | MEDLINE | ID: mdl-30298279

RESUMO

The National Institute for Health and Care Excellence (NICE) invited the company that manufactures ceritinib (Zykadia®, Novartis) to submit evidence on the clinical and cost effectiveness of the drug, as a first-line treatment for adults with anaplastic lymphoma kinase (ALK)-positive (+) advanced non-small-cell lung cancer (NSCLC), as part of the Institute's single technology appraisal (STA) process. The CRD (Centre for Reviews and Dissemination) and CHE (Centre for Health Economics) Technology Assessment Group at the University of York was commissioned to act as the Evidence Review Group (ERG). This paper describes the Company's submission (CS), the ERG review and NICE's subsequent decisions. The evidence submitted in support of ceritinib, as the first-line treatment in ALK+ advanced NSCLC, was a phase III, international, multicentre, open-label randomised controlled trial (RCT) comparing ceritinib with pemetrexed/cisplatin plus pemetrexed maintenance therapy (chemotherapy [CT] group). The results indicated that ceritinib prolonged progression-free survival (PFS) compared with CT. The only comparator considered in the CS was crizotinib. The evidence selected in support of crizotinib was PROFILE 1014, an open-label RCT of crizotinib, compared with pemetrexed/cisplatin CT (without maintenance therapy), in previously untreated advanced or metastatic ALK+ NSCLC. The design and population of PROFILE 1014 was similar to that of ASCEND-4, though there were some differences between the trials. The Company considered it not possible to perform an 'anchor-based' analysis of first-line ceritinib and crizotinib, and presented a Matching-Adjusted Indirect Comparison (MAIC) of ceritinib and crizotinib using only the ALK inhibitor arm of ASCEND-4 and PROFILE 1014. The indirect comparison suggests that ceritinib may be more effective in prolonging PFS than crizotinib. The ERG agreed that an indirect comparison using only the ALK inhibitor arm of the trials was the only option available in the present assessment; however, a number of limitations and potential bias were identified in this analysis. The Company's model estimated that ceritinib was cost effective when compared with crizotinib. However, the ERG highlighted several concerns with the Company's analysis; the ERG's preferred base case estimated an incremental cost-effectiveness ratio of £69,255 per quality-adjusted life-year (no patient access scheme [PAS] included). The ERG considered the economic analysis to be sensitive to changes in assumption used, partly due to the due to the immaturity of the overall survival data from trials, which leads to uncertainty around the extrapolation used. The NICE Appraisal Committee concluded that ceritinib is recommended, within its marketing authorisation, as an option for untreated ALK+ advanced NSCLC in adults, if the Company provides it with the discount agreed in the PAS.


Assuntos
Quinase do Linfoma Anaplásico/antagonistas & inibidores , Antineoplásicos/economia , Antineoplásicos/uso terapêutico , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Neoplasias Pulmonares/tratamento farmacológico , Pirimidinas/economia , Pirimidinas/uso terapêutico , Sulfonas/economia , Sulfonas/uso terapêutico , Carcinoma Pulmonar de Células não Pequenas/enzimologia , Carcinoma Pulmonar de Células não Pequenas/mortalidade , Ensaios Clínicos Fase III como Assunto , Análise Custo-Benefício , Humanos , Neoplasias Pulmonares/enzimologia , Neoplasias Pulmonares/mortalidade , Intervalo Livre de Progressão , Anos de Vida Ajustados por Qualidade de Vida , Ensaios Clínicos Controlados Aleatórios como Assunto , Avaliação da Tecnologia Biomédica/economia
6.
J Med Econ ; 21(6): 577-586, 2018 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-29458286

RESUMO

AIMS: To assess the cost-effectiveness of first-line ceritinib vs crizotinib and platinum doublet chemotherapy for anaplastic lymphoma kinase (ALK)-positive metastatic non-small cell lung cancer (NSCLC) from a US third-party payer's perspective. MATERIALS AND METHODS: A partitioned survival model with three health states (stable disease, progressive disease, death) was developed over a 20-year time horizon. Ceritinib's efficacy inputs (progression-free and overall survival) were estimated from ASCEND-4; parametric survival models extrapolated data beyond the trial period. The relative efficacy of ceritinib vs chemotherapy was obtained from ASCEND-4, the relative efficacy of ceritinib vs crizotinib was estimated using a matching-adjusted indirect comparison based on ASCEND-4 and PROFILE 1014. Drug acquisition, treatment administration, adverse event management, and medical costs were obtained from publicly available databases and the literature, and inflated to 2016 US dollars. Treatment-specific stable-state utilities were derived from trials and progressive-state utility from the literature. Incremental costs per quality-adjusted life year (QALY) were estimated for ceritinib vs each comparator. Cost-effectiveness was assessed based on US willingness-to-pay thresholds. Deterministic and probabilistic sensitivity analyses were performed to test model robustness. RESULTS: In the base case, first-line ceritinib was associated with total direct costs of $299,777 and 3.28 QALYs (from 4.61 life years gained [LYG]) over 20 years. First-line crizotinib and chemotherapy were associated with 2.73 and 2.41 QALYs, 3.92 and 3.53 LYG, and $263,172 and $228,184 total direct costs, respectively. The incremental cost per QALY gained was $66,064 for ceritinib vs crizotinib and $81,645 for ceritinib vs chemotherapy. In the first 2 years following treatment initiation, ceritinib dominated crizotinib by conferring greater health benefits at reduced total costs. Results were robust to deterministic and probabilistic sensitivity analyses. LIMITATIONS: In the absence of head-to-head trials, an indirect comparison method was used. CONCLUSIONS: Ceritinib is cost-effective compared to crizotinib and chemotherapy in the treatment of previously untreated ALK-positive metastatic NCSLC in the US.


Assuntos
Antineoplásicos/uso terapêutico , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Neoplasias Pulmonares/tratamento farmacológico , Pirazóis/uso terapêutico , Piridinas/uso terapêutico , Pirimidinas/uso terapêutico , Receptores Proteína Tirosina Quinases/biossíntese , Sulfonas/uso terapêutico , Quinase do Linfoma Anaplásico , Antineoplásicos/efeitos adversos , Antineoplásicos/economia , Protocolos de Quimioterapia Combinada Antineoplásica/economia , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Efeitos Psicossociais da Doença , Análise Custo-Benefício , Crizotinibe , Intervalo Livre de Doença , Humanos , Modelos Econométricos , Pirazóis/efeitos adversos , Pirazóis/economia , Piridinas/efeitos adversos , Piridinas/economia , Pirimidinas/efeitos adversos , Pirimidinas/economia , Anos de Vida Ajustados por Qualidade de Vida , Sulfonas/efeitos adversos , Sulfonas/economia , Análise de Sobrevida , Estados Unidos
7.
J Med Econ ; 20(7): 671-677, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28332433

RESUMO

Introduction Anaplastic lymphoma kinase (ALK) targeting drugs provide an important option for advanced non-small cell lung cancer patients with this distinct tumor type; however, there is considerable uncertainty as to which drug provides the optimal value after crizotinib treatment. This study estimated the cost-utility of alectinib vs ceritinib from a US payer perspective. Methods A cost-utility model was developed using partition survival methods and three health states: progression-free (PF), post-progression (PP), and death. Survival data were derived from the key clinical trials (alectinib: NP28761 & NP28673, ceritinib: ASCEND I and II). Costs included drugs, adverse events, and supportive care. Utilities were based on trial data and the literature. One-way and probabilistic sensitivity analyses (PSA) were performed to assess parameter uncertainty. Results Treatment with alectinib vs ceritinib resulted in increases of 2.55 months in the PF state, 0.44 quality adjusted life-years (QALYs), and $13,868, yielding a mean cost/QALY of $31,180. In the PSA, alectinib had a 96% probability of being cost-effective at a willingness-to-pay of $100,000/QALY. Drivers of model results were drug costs and utilities in the PF health state. The ICER ranged from $10,600-$65,000 per QALY in scenario analyses, including a sub-group analysis limited to patients with prior chemotherapy and crizotinib treatment. Conclusions Treatment with alectinib in ALK + crizotinib-treated patients increased time progression-free and QALYs vs ceritinib. The marginal cost increase was driven by longer treatment durations with alectinib. This model demonstrates that alectinib may be considered a cost-effective treatment after progression on crizotinib.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/economia , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Neoplasias Pulmonares/tratamento farmacológico , Quinase do Linfoma Anaplásico , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Carbazóis/economia , Carbazóis/uso terapêutico , Carcinoma Pulmonar de Células não Pequenas/patologia , Análise Custo-Benefício , Crizotinibe , Intervalo Livre de Doença , Resistencia a Medicamentos Antineoplásicos , Feminino , Humanos , Neoplasias Pulmonares/patologia , Masculino , Cadeias de Markov , Pessoa de Meia-Idade , Modelos Econômicos , Piperidinas/economia , Piperidinas/uso terapêutico , Pirazóis/economia , Pirazóis/uso terapêutico , Piridinas/economia , Piridinas/uso terapêutico , Pirimidinas/economia , Pirimidinas/uso terapêutico , Anos de Vida Ajustados por Qualidade de Vida , Receptores Proteína Tirosina Quinases/metabolismo , Sulfonas/economia , Sulfonas/uso terapêutico , Análise de Sobrevida
8.
J Med Econ ; 19(10): 936-44, 2016 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-27149298

RESUMO

BACKGROUND: To assess the cost-effectiveness of ceritinib vs alternatives in patients who discontinue treatment with crizotinib in anaplastic lymphoma kinase-positive (ALK+) non-small cell lung cancer (NSCLC) from a Canadian public healthcare perspective. METHODS: A partitioned survival model with three health states (stable, progressive, and death) was developed. Comparators were chosen based on reported utilization from a retrospective Canadian chart study; comparators were pemetrexed, best supportive care (BSC), and historical control (HC). HC comprised of all treatment alternatives reported. Progression-free survival and overall survival for ceritinib were estimated using data reported from single-arm clinical trials (ASCEND-1 [NCT01283516] and ASCEND-2 [NCT01685060]). Survival data for comparators were obtained from published clinical trials in a NSCLC population and from a Canadian retrospective chart study. Parametric models were used to extrapolate outcomes beyond the trial period. Drug acquisition, administration, resource use, and adverse event (AE) costs were obtained from databases. Utilities for health states and disutilities for AEs based on EQ-5D were derived from literature. Incremental costs per quality-adjusted life year (QALY) gained were estimated. Univariate and probabilistic sensitivity analyses were performed. RESULTS: Over 4 years, ceritinib was associated with 0.86 QALYs and total direct costs of $89,740 for the post-ALK population. The incremental cost-effectiveness ratio (ICER) was $149,117 comparing ceritinib vs BSC, $80,100 vs pemetrexed, and $104,436 vs HC. Additional scenarios included comparison to docetaxel with an ICER of $149,780 and using utility scores reported from PROFILE 1007, with a reported ICER ranging from $67,311 vs pemetrexed to $119,926 vs BSC. Due to limitations in clinical efficacy input, extensive sensitivity analyses were carried out whereby results remained consistent with the base-case findings. CONCLUSION: Based on the willingness-to-pay threshold for end-of-life cancer drugs, ceritinib may be considered as a cost-effective option compared with other alternatives in patients who have progressed or are intolerant to crizotinib in Canada.


Assuntos
Antineoplásicos/economia , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Pirazóis/economia , Piridinas/economia , Pirimidinas/economia , Pirimidinas/uso terapêutico , Receptores Proteína Tirosina Quinases/isolamento & purificação , Sulfonas/economia , Sulfonas/uso terapêutico , Quinase do Linfoma Anaplásico , Canadá , Análise Custo-Benefício , Crizotinibe , Intervalo Livre de Doença , Feminino , Financiamento Pessoal , Humanos , Masculino , Auditoria Médica , Pessoa de Meia-Idade , Pirazóis/uso terapêutico , Piridinas/uso terapêutico , Anos de Vida Ajustados por Qualidade de Vida , Estudos Retrospectivos
9.
BMC Health Serv Res ; 15: 498, 2015 Nov 06.
Artigo em Inglês | MEDLINE | ID: mdl-26545734

RESUMO

BACKGROUND: Over the last decade, actions following some adverse drug events received major publicity. This study investigated changes in usage patterns of medications in Australia following two examples - rofecoxib market withdrawal (2004) and warnings about jaw necrosis following bisphosphonates (2007). METHODS: Dispensing data for COX-2 inhibitors (2000-2008) and anti-osteoporosis medications (2003-2012) were obtained from the Australian Pharmaceutical Benefits Scheme database. For bisphosphonates, data on Australian marketing expenditures were purchased from Cegedim(R). RESULTS: For COX-2 inhibitors, celecoxib dispensing halved after rofecoxib withdrawal, but meloxicam dispensing increased by 60 %. When lumiracoxib was introduced (2006) there was uptake of prescribing at a faster rate than meloxicam in 2002, its first year of use. For bisphosphonates, alendronate had highest use at the time of the warnings (8.3 DDD/1000/day), dropping to 4.9 DDD/1000/day by 2012. In contrast, risedronate use rose 2007-2012 from 4.1 to 4.9 DDD/1000/day. There was 49 % increase in reported annual expenditure on detailing for risedronate from 2007 to 2008 (to AUD$7.3 million) and only 29 % increase for alendronate (to AUD$3.1 million). CONCLUSIONS: The rapid uptake of prescribing of lumiracoxib and increased use of meloxicam flagged a concern, especially after rofecoxib withdrawal due to safety issues. Bisphosphonates are useful drugs, however the dramatic rise in expenditure on detailing, followed by a rise in utilisation of risedronate could suggest that adverse publicity triggered a marketing response. These examples highlight the importance of tracking utilisation of medication classes in real time, using different data as needed, to ensure that due caution is exercised (and quick intervention provided if needed) for medications in the same class.


Assuntos
Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos , Adesão à Medicação , Idoso , Austrália , Conservadores da Densidade Óssea/economia , Conservadores da Densidade Óssea/uso terapêutico , Celecoxib/economia , Celecoxib/uso terapêutico , Inibidores de Ciclo-Oxigenase 2/economia , Inibidores de Ciclo-Oxigenase 2/uso terapêutico , Difosfonatos/economia , Difosfonatos/uso terapêutico , Feminino , Humanos , Lactonas/economia , Lactonas/uso terapêutico , Meloxicam , Osteoporose/tratamento farmacológico , Sulfonas/economia , Sulfonas/uso terapêutico , Tiazinas/economia , Tiazinas/uso terapêutico , Tiazóis/economia , Tiazóis/uso terapêutico
10.
Biomacromolecules ; 15(6): 2067-78, 2014 Jun 09.
Artigo em Inglês | MEDLINE | ID: mdl-24762265

RESUMO

Clinical and industrial applications of human pluripotent stem cells (hPSC) require large amounts of cells that have been expanded under defined conditions. Labor-intensive techniques and ill-defined or expensive compounds and substrates are not applicable. Here we describe a chemically defined synthetic substrate consisting of polysulfone (PSF) membranes coated with polymerized 3,4-dihydroxy-l-phenylalanine (DOPA). DOPA/PSF is inexpensive and can be easily produced at various shapes and sizes. DOPA/PSF supports long-term self-renewal of undifferentiated human embryonic (hESC) and human induced pluripotent stem cells (hiPSC) under defined conditions. Pluripotency is maintained for at least 10 passages. Adhesion of hPSC to DOPA/PSF is mainly mediated by a specific integrin heterodimer. Proliferation and gene expression patterns on DOPA/PSF and control substrates are comparable. Labor-intensive cultivation methods and use of serum or coating with proteins are not required. Together, these features make DOPA/PSF attractive for applications where large-scale expansion of human pluripotent stem cells under defined conditions is essential.


Assuntos
Técnicas de Cultura de Células/métodos , Análise Custo-Benefício , Di-Hidroxifenilalanina/química , Células-Tronco Pluripotentes Induzidas/efeitos dos fármacos , Polímeros/química , Sulfonas/química , Técnicas de Cultura de Células/economia , Proliferação de Células/efeitos dos fármacos , Proliferação de Células/fisiologia , Análise Custo-Benefício/métodos , Di-Hidroxifenilalanina/economia , Di-Hidroxifenilalanina/farmacologia , Humanos , Células-Tronco Pluripotentes Induzidas/metabolismo , Polímeros/economia , Polímeros/farmacologia , Especificidade por Substrato/efeitos dos fármacos , Especificidade por Substrato/fisiologia , Sulfonas/economia
11.
J Sex Med ; 11(4): 1056-1062, 2014 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-24382018

RESUMO

INTRODUCTION: The United Kingdom is unusual in that a significant proportion of patients with erectile dysfunction (ED) have their treatment fully reimbursed by the National Health Service (NHS). This may have consequences for the choice of treatment and for compliance with treatment. AIMS: The aim of this study was to evaluate the use and cost implications of phosphodiesterase type 5 inhibitor in an NHS setting. METHODS: Basic demographics and data on ED management for patients treated from January 2000 to April 2011 were obtained from a prospectively accrued database. We reviewed drug usage and costs as well as switching between drugs. Patients were given the choice of all available therapies and were followed up annually. MAIN OUTCOME MEASURES: Switching, compliance, and costs of treating ED under the "severe distress" criteria in the NHS were reviewed for this study. RESULTS: Two thousand one hundred fifty-nine patients qualified for reimbursed therapy. Two hundred twenty-six patients were excluded from further analysis owing to missing data. Patients were followed up on an annual basis. The mean patient age was 60.2 years (min 23, max 90), and the mean follow-up was 50.8 months (min 1, max 127). Six hundred ninety-six were started on sildenafil, 990 on tadalafil, 163 on vardenafil, and 84 on intracavernosal alprostadil. Eighteen percent of patients initially started on the scheme and stopped medication unilaterally. Of the patients, 12.3% changed their medication during follow-up. The cost of drugs increased year by year from £257,100 in 2007 to £352,519 in 2011. CONCLUSIONS: Our real-life observational study shows that in our institution, dropout of therapy is unusual. We hypothesize that this reflects, in part, the reimbursement issue. We also found that switching between drugs was unusual, although there are several possible explanations for that. Although this is a successful system for the patients, the hospital, which bears the costs of medication, is finding this an increasing economic drain.


Assuntos
Disfunção Erétil/tratamento farmacológico , Inibidores da Fosfodiesterase 5/uso terapêutico , Adulto , Idoso , Idoso de 80 Anos ou mais , Assistência Ambulatorial/economia , Carbolinas/economia , Carbolinas/uso terapêutico , Custos de Medicamentos , Disfunção Erétil/economia , Humanos , Imidazóis/economia , Imidazóis/uso terapêutico , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Cooperação do Paciente , Inibidores da Fosfodiesterase 5/economia , Piperazinas/economia , Piperazinas/uso terapêutico , Purinas/economia , Purinas/uso terapêutico , Citrato de Sildenafila , Medicina Estatal/economia , Sulfonas/economia , Sulfonas/uso terapêutico , Tadalafila , Triazinas/economia , Triazinas/uso terapêutico , Reino Unido , Dicloridrato de Vardenafila , Adulto Jovem
12.
J Sex Med ; 10(5): 1389-400, 2013 May.
Artigo em Inglês | MEDLINE | ID: mdl-23347555

RESUMO

INTRODUCTION: Sildenafil was the first oral phosphodiesterase type 5 (PDE5) inhibitor introduced as primary therapy for erectile dysfunction (ED). In the 7 years following its market launch, sildenafil was prescribed by more than 750,000 physicians to more than 23 million men worldwide. To date, few studies have evaluated the economic impact of sildenafil in treating ED. AIM: To evaluate the cost-effectiveness and impact of sildenafil on health care costs for patients with ED in multiple countries. MAIN OUTCOMES MEASURES: Economic outcomes including cost, cost-effectiveness, cost of illness, cost consequence, resource use, productivity, work loss, and willingness to pay (WTP) were investigated. METHODS: Using keywords related to economic outcomes and sildenafil, we systematically searched literature published between July 2001 and July 2011 using MEDLINE and EMBASE. Included articles pertained to costs, WTP, and economic evaluations. RESULTS: In the last 10 years, 12 studies assessed economic outcomes associated with sildenafil for ED. Most studies were conducted in the United States and the United Kingdom, with one study identified in Canada and one from Mexico. Six studies evaluated cost of illness, cost consequence, or cost of care, and four studies evaluated WTP or drug pricing by country in the United States and the United Kingdom. In the United States and the United Kingdom, costs to health care systems have increased with demand for treatment. Cost analyses suggested that sildenafil would lower direct costs compared with other PDE5 inhibitors. U.S. and U.K. studies found that patients exhibited WTP for sildenafil. The two cost-effectiveness models we identified examined ED sub-groups, those with spinal cord injury and those with diabetes or hypertension. These models indicated favorable cost-effectiveness profiles for sildenafil compared with other active-treatment options in both Mexico and Canada. CONCLUSIONS: The relative value of sildenafil vs. surgically implanted prosthetic devices and other PDE5 inhibitors, is underscored by patients' WTP, and cost-effectiveness in ED patients with comorbidities.


Assuntos
Disfunção Erétil/economia , Custos de Cuidados de Saúde , Inibidores da Fosfodiesterase 5/economia , Piperazinas/economia , Sulfonas/economia , Adulto , Idoso , Idoso de 80 Anos ou mais , Canadá , Análise Custo-Benefício , Disfunção Erétil/tratamento farmacológico , Humanos , Masculino , México , Pessoa de Meia-Idade , Inibidores da Fosfodiesterase 5/uso terapêutico , Piperazinas/uso terapêutico , Purinas/economia , Purinas/uso terapêutico , Citrato de Sildenafila , Sulfonas/uso terapêutico , Reino Unido , Estados Unidos
13.
BMC Pulm Med ; 12: 75, 2012 Dec 11.
Artigo em Inglês | MEDLINE | ID: mdl-23231890

RESUMO

BACKGROUND: Little is known concerning the degree to which initiation of sildenafil for pulmonary arterial hypertension (PAH) impacts patterns of healthcare utilization and costs. METHODS: Using a large US health insurance claims database, we identified all patients with evidence of PAH (ICD-9-CM diagnosis codes 416.0, 416.8) who received sildenafil between 1/1/2005 and 9/30/2008. Date of the first-noted prescription for sildenafil was designated the "index date," and claims data were compiled for all study subjects for 6 months prior to their index date ("pretreatment") and 6 months thereafter ("follow-up"); patients with incomplete data during either of these periods were excluded. Healthcare utilization and costs were then compared between pretreatment and follow-up for all study subjects. RESULTS: A total of 567 PAH patients were identified who began therapy with sildenafil and met all other study entry criteria. Mean (SD) age was 52 (10) years; 73% were women. Healthcare utilization was largely unchanged between pretreatment and follow-up, the only exceptions being decreases in the mean number of emergency department visits (from 0.7 to 0.5 per patient; p<0.01) and the percentage of patients hospitalized (from 35% to 29%; p=0.01). The mean cost of all PAH-related medication was $7139 during pretreatment and $14,095 during follow-up (sildenafil cost during follow-up= $5236); exclusive of PAH-related medications, however, total healthcare costs decreased modestly (from $30,104 to $27,605) (p<0.01 for all comparisons). CONCLUSIONS: The cost of sildenafil therapy may be partially offset by reductions in other healthcare costs.


Assuntos
Atenção à Saúde/estatística & dados numéricos , Custos de Cuidados de Saúde/estatística & dados numéricos , Hipertensão Pulmonar/tratamento farmacológico , Hipertensão Pulmonar/economia , Piperazinas/economia , Piperazinas/uso terapêutico , Sulfonas/economia , Sulfonas/uso terapêutico , Adulto , Codificação Clínica , Estudos de Coortes , Hipertensão Pulmonar Primária Familiar , Feminino , Seguimentos , Humanos , Hipertensão Pulmonar/classificação , Formulário de Reclamação de Seguro/economia , Formulário de Reclamação de Seguro/estatística & dados numéricos , Revisão da Utilização de Seguros/economia , Revisão da Utilização de Seguros/estatística & dados numéricos , Masculino , Pessoa de Meia-Idade , Purinas/economia , Purinas/uso terapêutico , Estudos Retrospectivos , Citrato de Sildenafila , Estados Unidos , Vasodilatadores/economia , Vasodilatadores/uso terapêutico
17.
Value Health ; 14(1): 97-101, 2011 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-21211491

RESUMO

OBJECTIVE: To compare the cost-effectiveness of four, six, and eight doses per month of vardenafil in the context of pharmacy benefit decision making. METHODS: A Markov model was used to estimate the incremental cost-effectiveness of zero, four, six, or eight doses of vardenafil per month in hypothetical cohorts of 60-year-old male veterans with erectile dysfunction. Efficacy values for vardenafil were obtained from the literature, and vardenafil costs were obtained from Veterans Affairs pharmacy data. The analysis was conducted from a third-party payer perspective with a lifetime horizon, and the effect of parameter uncertainty was explored in one-way and probabilistic sensitivity analyses. RESULTS: In the base case analysis, the cost per quality-adjusted life-year gained for four doses of vardenafil per month compared with no therapy was $576. Six doses per month compared with four cost $2585/quality-adjusted life-year gained, and eight doses per month compared with six cost $5169/quality-adjusted life-year gained. In one-way sensitivity analyses of six doses per month compared with four, variation of two parameters caused the incremental cost-effectiveness ratio to cross a willingness-to-pay threshold of $20,000: when the increased utility associated with giving two additional doses/month was less than 0.001 (baseline 0.01) and when the cost per dose increased to $15.00 (baseline $1.69). CONCLUSION: Although four doses per month of vardenafil was the most cost-effective strategy, the use of six or eight doses per month also compares favorably with other accepted medical treatments. The results were stable across a range of inputs and help to support the current Veterans Affairs policy on the number of vardenafil doses provided per month for erectile dysfunction.


Assuntos
Custos de Medicamentos , Disfunção Erétil/tratamento farmacológico , Imidazóis/economia , Inibidores da Fosfodiesterase 5/economia , Piperazinas/economia , Qualidade de Vida , Adulto , Idoso , Idoso de 80 Anos ou mais , Análise Custo-Benefício , Esquema de Medicação , Disfunção Erétil/economia , Humanos , Imidazóis/administração & dosagem , Masculino , Cadeias de Markov , Pessoa de Meia-Idade , Modelos Econométricos , Inibidores da Fosfodiesterase 5/administração & dosagem , Piperazinas/administração & dosagem , Anos de Vida Ajustados por Qualidade de Vida , Sulfonas/administração & dosagem , Sulfonas/economia , Triazinas/administração & dosagem , Triazinas/economia , Dicloridrato de Vardenafila , Veteranos
20.
Int J Pharm Pract ; 18(6): 341-5, 2010 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-21054594

RESUMO

OBJECTIVES: to categorise online suppliers of Viagra based on their legal status, and to quantify the suppliers within each category. METHODS: Google was used to search for websites offering to sell or supply either proprietary Viagra tablets or generic versions containing sildenafil citrate. Relevant websites were classified as falling into one of three categories, which were further subclassified. Simple descriptive statistics were calculated. KEY FINDINGS: the number of relevant sites found within the first 100 Google hits, following the removal of mirror and affiliate sites, was 44. Only 6.8% of sites identified were legitimate online pharmacies. Some 34.1% of sites offered to sell Viagra to patients in the UK without any form of medical consultation. Whether or not the online consultation offered by 59.1% of sites had to be completed in order to make a purchase could not be confirmed. The location of only three pharmacies could be ascertained; the remainder made various claims as to their location, which could not be verified. CONCLUSIONS: we have been unable to verify that the questionnaires used for online consultations are scrutinised by any healthcare practitioners to determine the appropriateness of the treatment sought. This represents a serious safety concern for UK residents who procure drugs for erectile dysfunction on the internet.


Assuntos
Controle de Medicamentos e Entorpecentes , Internet , Assistência Farmacêutica/normas , Piperazinas/provisão & distribuição , Sulfonas/provisão & distribuição , Vasodilatadores/provisão & distribuição , Comércio/normas , Disfunção Erétil/tratamento farmacológico , Humanos , Masculino , Assistência Farmacêutica/legislação & jurisprudência , Piperazinas/economia , Piperazinas/uso terapêutico , Purinas/economia , Purinas/provisão & distribuição , Purinas/uso terapêutico , Citrato de Sildenafila , Sulfonas/economia , Sulfonas/uso terapêutico , Inquéritos e Questionários , Reino Unido , Vasodilatadores/economia , Vasodilatadores/uso terapêutico
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