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Yousef CC, Khan MA, Almodaimegh H, Alshamrani M, Al-Foheidi M, AlAbdalkarim H, AlJedai A, Naeem A, Abraham I. Cost-efficiency analysis of conversion to biosimilar filgrastim for supportive cancer care and resultant expanded access analysis to supportive care and early-stage HER2+ breast cancer treatment in Saudi Arabia: simulation study. J Med Econ 2023; 26:394-402. [PMID: 36815700 DOI: 10.1080/13696998.2023.2183680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
AIMS This study estimated, for Saudi Arabia, the cost-efficiency of converting patients from reference Neupogen and Neulastim to one of two filgrastim biosimilars (Nivestim, Zarzio); the budget-neutral expanded access to supportive care with biosimilar filgrastim and therapeutic care to ado-trastuzumab emtansine thus afforded; and the number-needed-to-convert (NNC) to provide supportive or therapeutic treatment to one patient. MATERIALS AND METHODS Replicating prior studies, we modeled the cost-efficiencies gained from converting varying proportions of a hypothetical panel of 4,000 patients undergoing six cycles of cancer treatment from Neupogen or Neulastim to one of the two biosimilar G-CSF formulations, using national cost inputs. Cost-savings in USD were used to estimate the additional doses of biosimilar G-CSF and expanded access to ado-trastuzumab emtansine on a budget-neutral basis, and NNC to purchase one additional dose of supportive or therapeutic treatment. RESULTS Savings from conversion from reference to a biosimilar filgrastim were $3,086,400 (Nivestim) and $3,460,800 (Zarzio). With reference pegfilgrastim, savings from conversion were $11,712,240 (Nivestim) and $12,086,640 (Zarzio). Biosimilar conversion from reference to biosimilar filgrastim enabled expanded access to ado-trastuzumab emtansine ranging from 61 patients (5 days, Nivestim) to 191 patients (14 days, Zarzio). For supportive care, biosimilar conversion enabled expanded access ranging from 8,244 patients (5 days, Nivestim) to 25,882 patients (14 days, Zarzio). For biosimilar conversion from daily filgrastim, the NNC for treatment with ado-trastuzumab emtansine decreased as days of injections increased [5 days: 395 (Nivestim), 352 (Zarzio); 14 days: 141(Nivestim), 126 (Zarzio)]. Alternately, for biosimilar conversion from single-injection pegfilgrastim to daily biosimilar filgrastim, the NNC for treatment with ado-trastuzumab emtansine rose as days of injections increased, being highest under the 14-day scenario (146, Nivestim; 130, Zarzio). CONCLUSION This simulation study demonstrated significant potential cost-savings from biosimilar conversion. These savings provide budget-neutral increased access to supportive and therapeutic cancer care.
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Affiliation(s)
- Consuela Cheriece Yousef
- Pharmaceutical Care Department, Ministry of National Guard - Health Affairs, Dammam, Saudi Arabia
- King Abdullah International Medical Research Center, Al Ahsa, Saudi Arabia
- King Saud bin Abdul-Aziz University for Health Sciences, Al Ahsa, Saudi Arabia
| | - Mansoor Ahmed Khan
- Pharmaceutical Care Department, Ministry of the National Guard-Health Affairs, Jeddah, Saudi Arabia
- King Abdullah International Medical Research Center, Jeddah, Saudi Arabia
- King Saud bin Abdul-Aziz University for Health Sciences, Jeddah, Saudi Arabia
| | - Hind Almodaimegh
- College of Pharmacy, King Saud bin Abdul-Aziz University for Health Sciences, Riyadh, Saudi Arabia
- Pharmaceutical Care Department, Ministry of National Guard-Health Affairs, Riyadh, Saudi Arabia
- King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
| | - Majed Alshamrani
- Pharmaceutical Care Department, Ministry of the National Guard-Health Affairs, Jeddah, Saudi Arabia
- King Abdullah International Medical Research Center, Jeddah, Saudi Arabia
- King Saud bin Abdul-Aziz University for Health Sciences, Jeddah, Saudi Arabia
| | - Meteb Al-Foheidi
- King Abdullah International Medical Research Center, Jeddah, Saudi Arabia
- College of Medicine, King Saud bin Abdul-Aziz University for Health Sciences, Jeddah, Saudi Arabia
- Department of Oncology, Ministry of National Guard-Health Affairs, Riyadh, Saudi Arabia
| | - Hana AlAbdalkarim
- King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
- Drug Policy and Economic Center, Ministry of National Guard-Health Affairs, Riyadh, Saudi Arabia
- Doctoral School of Applied Informatics and Applied Mathematics, Obuda University, Budapest, Hungary
| | - Ahmed AlJedai
- Therapeutic Affairs, Ministry of Health, Riyadh, Saudi Arabia
- Colleges of Pharmacy and Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | - Anjum Naeem
- Pharmaceutical Care Department, Ministry of the National Guard-Health Affairs, Jeddah, Saudi Arabia
- King Abdullah International Medical Research Center, Jeddah, Saudi Arabia
- King Saud bin Abdul-Aziz University for Health Sciences, Jeddah, Saudi Arabia
| | - Ivo Abraham
- Center for Health Outcomes and PharmacoEconomic Research, University of Arizona, Tucson, AZ, USA
- Matrix45, Tucson, AZ, USA
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