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García-Carmona JA, García-Pérez A, Isidro García G, Forcen-Muñoz LA, Ovejero García S, Sáez Povedano R, González-Galdámez AL, Mata Iturralde L, Hernández-Sánchez F, Ramirez Bonilla M, Fuentes-Pérez P, Ovejas-Catalán C, Suárez-Pinilla P, Valdivia-Muñoz F, Fernández Abascal B, Omaña Colmenares M, de Lourdes Martín-Pérez Á, Campos-Navarro MP, Baca-García E, Benavente-López S, Raya Platero A, Barberán Navalón M, Sánchez-Alonso S, Vázquez-Bourgon J, Pappa S. Preliminary data from a 4-year mirror-image and multicentre study of patients initiating paliperidone palmitate 6-monthly long-acting injectable antipsychotic: the Paliperidone 2 per Year study. Ther Adv Psychopharmacol 2023; 13:20451253231220907. [PMID: 38152569 PMCID: PMC10752040 DOI: 10.1177/20451253231220907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Accepted: 11/22/2023] [Indexed: 12/29/2023] Open
Abstract
Background Paliperidone palmitate 6-monthly (PP6M) is the first long-acting antipsychotic injectable (LAI) to allow for only two medication administrations per year, though there is presently limited insight into its effectiveness and potential added value in real clinical practice conditions. Objectives To present our ongoing study and draw its preliminary data on patient characteristics initiating PP6M and adherence during the first year of treatment. Methods The paliperidone 2 per year (P2Y) study is a 4-year, multicentre, prospective mirror-image pragmatic study taking place at over 20 different sites in Europe. The mirror period covers 2 years either side of the PP6M LAI initiation. Retrospective data for the previous 2 years are collected for each patient from the electronic health records. Prospective data are recorded at baseline, 6, 12, 18 and 24 months of drug administration and also cover information on concomitant psychiatric medication, relapses, hospital admissions, side effects, discontinuation and its reasons. Meanwhile, here we present preliminary data from the P2Y study at basal and 6-month period (first and second PP6M administration). Results At the point of PP6M initiation, the most frequent diagnosis was schizophrenia (69%), the clinical global impression scale mean score was 3.5 (moderately markedly ill) and the rate of previous hospital admissions per patient and year was 0.21. PP6M was initiated after a median of 3-4 years on previous treatment: 146 (73%) from paliperidone palmitate 3-monthly, 37 (19%) from paliperidone palmitate 1-monthly and 17 (9%) from other antipsychotics. The mean dose of the first PP6M was 1098.9 mg. The retention rate at 6 months and 1 year of treatment on PP6M in our cohort was 94%. Conclusion Patient and clinician preference for LAIs with longer dosing intervals was the main reason for PP6M initiation/switching resulting in high treatment persistence. Future data are needed to evaluate the full impact of PP6M in clinical practice.
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Affiliation(s)
- Juan Antonio García-Carmona
- Department of Neurology, Santa Lucía University Hospital, C/Mezquita s/n 30202, Cartagena, Murcia 30202, Spain
- Group of Clinical and Experimental Pharmacology, Institute for Biomedical Research of Murcia (IMIB), Murcia, Spain
- Faculty of Pharmacy and Nutrition, San Antonio Catholic University of Murcia (UCAM), Murcia, Spain
| | - Alba García-Pérez
- Centre of Mental Health Molina de Segura, Molina de Segura, Murcia, Spain
| | - Guillermo Isidro García
- Department of Psychiatry, Marqués de Valdecilla University Hospital, Universidad de Cantabria, Santander, Spain
- Psychiatry and Mental Health Research Group, Instituto Investigación Sanitaria Valdecilla (IDIVAL), Santander, Spain
| | | | | | - Rocío Sáez Povedano
- Department of Psychiatry, General Hospital of Villarrobledo, Villarrobledo, Albacete, Spain
| | | | | | | | - Mariluz Ramirez Bonilla
- Department of Psychiatry, Marqués de Valdecilla University Hospital, Universidad de Cantabria, Santander, Spain
- Psychiatry and Mental Health Research Group, Instituto Investigación Sanitaria Valdecilla (IDIVAL), Santander, Spain
| | - Paloma Fuentes-Pérez
- Psychiatry and Mental Health Research Group, Instituto Investigación Sanitaria Valdecilla (IDIVAL), Santander, Spain
| | - Claudia Ovejas-Catalán
- Psychiatry and Mental Health Research Group, Instituto Investigación Sanitaria Valdecilla (IDIVAL), Santander, Spain
| | - Paula Suárez-Pinilla
- Department of Psychiatry, Marqués de Valdecilla University Hospital, Universidad de Cantabria, Santander, Spain
- Psychiatry and Mental Health Research Group, Instituto Investigación Sanitaria Valdecilla (IDIVAL), Santander, Spain
| | - Francisco Valdivia-Muñoz
- Department of Psychiatry, Santa Lucía University Hospital, Cartagena, Murcia, Spain
- Unit of Assertive Community Treatment, Centre Mental Health Cartagena, Cartagena, Murcia, Spain
| | - Blanca Fernández Abascal
- Department of Psychiatry, Marqués de Valdecilla University Hospital, Universidad de Cantabria, Santander, Spain
- Psychiatry and Mental Health Research Group, Instituto Investigación Sanitaria Valdecilla (IDIVAL), Santander, Spain
| | | | | | | | | | | | | | | | | | - Javier Vázquez-Bourgon
- Department of Psychiatry, Marqués de Valdecilla University Hospital, Universidad de Cantabria, Santander, Spain
- Psychiatry and Mental Health Research Group, Instituto Investigación Sanitaria Valdecilla (IDIVAL), Santander, Spain
- Centro de Investigación Biomédica en Red en Salud Mental (CIBERSAM), Instituto de Salud Carlos III, Sevilla, Spain
| | - Sofia Pappa
- West London National Health System (NHS) Trust, London, UK
- Department of Brain Sciences, Imperial College of London, London, UK
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Wang GHM, Svensson M, Shao H, Vouri SM, Park H. Cost-effectiveness analysis of monthly, 3-monthly, and 6-monthly long-acting injectable and oral paliperidone in adults with schizophrenia. J Manag Care Spec Pharm 2023; 29:884-895. [PMID: 37523313 PMCID: PMC10397333 DOI: 10.18553/jmcp.2023.29.8.884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
BACKGROUND: Paliperidone is among the most cost-effective antipsychotics in adults with schizophrenia, and it has different formulations, including oral paliperidone extended-release (ER) and long-acting injectable (LAI) paliperidone formulations administered every month (PP1M), 3 months (PP3M), or 6 months (PP6M). However, cost-effectiveness analyses comparing different paliperidone formulations were limited. OBJECTIVE: To compare the cost-effectiveness across different paliperidone formulations. METHODS: A Markov model was developed to simulate 1,000 adults aged 40 years with stable schizophrenia transitioning among stable disease-medication adherent, stable disease-medication nonadherent, relapse with hospitalization, relapse with ambulatory care, and death states every 3 months for 5 years. Drug costs were estimated using the prices listed in the Veterans Affairs Federal Supply Schedule, and costs for treating complications were estimated from published studies. All costs were estimated from the US health care system perspective and standardized to 2022 US dollars using the Consumer Price Index Inflation Calculator. Quality-adjusted life-years (QALYs) were estimated using relapse rates from randomized clinical trials and health-related quality of life scores from observational studies. The estimated future costs and QALYs were discounted at 3%. We reported incremental net monetary benefits between alternative formulations at the $50,000 willingness-to-pay (WTP) threshold with a positive value indicating cost-effectiveness. The impact of parameter uncertainty on study outcomes was assessed using 1-way deterministic and probabilistic sensitivity analyses. RESULTS: In adults with schizophrenia stabilized with paliperidone ER, switching to LAI formulations was associated with increased QALY (PP1M = 0.05, PP3M = 0.14, PP6M = 0.15) and increased cost (PP1M = 49,433, PP3M = 26,698, PP6M = 26,147), leading to a negative incremental net monetary benefit (PP1M = -$46,804, PP3M = -$19,508, PP6M = -$18,886) compared with continuing ER. Among LAI formulations, PP6M was cost-saving with the most QALYs gained (cost = $63,277, QALY = 3.731), followed by PP3M (cost = $63,828, QALY = 3.729) and PP1M (cost = $86,563, QALY = 3.638). At the $50,000 WTP threshold, the probabilities for PP1M, PP3M, and PP6M being cost-effective compared with paliperidone ER were 0.4%, 10.2%, and 9.8%, respectively. The probability of PP6M being cost-effective was 92.6% for the PP6M-PP1M pair and 55.2% for the PP6M-PP3M pair, and 91.1% of PP3M use was cost-effective in the PP3M-PP1M pair. The results were generally robust in the sensitivity analyses, even at the $190,000 WTP threshold. CONCLUSIONS: For patients with schizophrenia stabilized with paliperidone ER, switching to LAI formulations was not cost-effective, suggesting the high drug costs for LAI may not justify the improved quality of life within 5 years. Among LAI formulations, PP6M was cost-effective over PP1M and PP3M.
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Affiliation(s)
- Grace Hsin-Min Wang
- Department of Pharmaceutical Outcomes & Policy, College of Pharmacy, University of Florida, Gainesville
| | - Mikael Svensson
- Department of Pharmaceutical Outcomes & Policy, College of Pharmacy, University of Florida, Gainesville
| | - Hui Shao
- Department of Pharmaceutical Outcomes & Policy, College of Pharmacy, University of Florida, Gainesville
| | - Scott Martin Vouri
- Department of Pharmaceutical Outcomes & Policy, College of Pharmacy, University of Florida, Gainesville
- Center for Drug Evaluation and Safety, College of Pharmacy, University of Florida, Gainesville
| | - Haesuk Park
- Department of Pharmaceutical Outcomes & Policy, College of Pharmacy, University of Florida, Gainesville
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