Abstract
Background: Schizophrenia is a serious mental disorder that has greater negative consequences on role functioning than many other severe chronic diseases. Objective: We evaluated the economic impact of long-acting injections of paliperidone palmitate (PP) vs daily oral antipsychotics to treat chronic schizophrenia from a societal perspective over a 2-year period. Methods: A static budget impact model was developed to compare PP with daily oral antipsychotics (risperidone, olanzapine, and aripiprazole) in the treatment of patients with chronic schizophrenia. Our study included treatments used during relapse and hospitalization, validated by an expert panel. The clinical parameters were extracted from the PRIDE trial. Direct medical costs and indirect costs were measured. The unit cost of drug acquisition for all medications was extracted from the public sector. One-way sensitivity analyses were conducted. Results: The target population in our model was estimated to be 142 incident patients. In the first year, the total drug costs in Egyptian pounds (EGP) for PP and oral antipsychotics were £2.7 million and £724 004, respectively, while the total medical costs for PP and oral antipsychotics were £3 million and £5.6 million, respectively. In the second year, the total drug costs for PP and oral antipsychotics were £2.7 million and £724 004, respectively, while the total medical costs for PP and oral antipsychotics were £3 million and £5 million, respectively. The total costs for PP (£11.6 million) over 2 years were less than those of oral antipsychotics without PP (£12.7 million). PP produced an estimated budget savings of £1 046 561 (budget savings per patient per year, £3667). In addition, PP resulted in the avoidance of 18 hospitalizations per year compared with the without-PP arm. Sensitivity analyses showed that the percent of hospitalizations for both oral antipsychotics and PP had the greatest impact on the results. Conclusion: The lower hospitalization rates associated with PP offset the increase in drug costs. PP may potentially be cost-saving compared with the standard of care in chronic schizophrenia in Egyptian representative healthcare settings. Policy makers may consider this approach to improve patient outcomes and budget sustainability.
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