Unfilled prescription rate across all brands and branded generics

During the first four years a new medicine is on the market, fill rates improve; however, by year four, more than half of new prescriptions still go unfilled, significantly higher than the 29% unfilled rate across all brands and branded generics.

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APA

IQVIA Institute. (2025). U.S. Medicine Use Trends 2026. Retrieved September 15, 2026, from https://www.iqvia.com/insights/the-iqvia-institute/reports-and-publications/reports/us-medicine-use-trends-2026. Via StatOrigin, https://statorigin.org/stat/stat_01M2KJ7XCF5037JCNPDKKT7NN5

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MLA

IQVIA Institute. "U.S. Medicine Use Trends 2026." 2025, https://www.iqvia.com/insights/the-iqvia-institute/reports-and-publications/reports/us-medicine-use-trends-2026. Accessed 15 Sept. 2026 via StatOrigin, https://statorigin.org/stat/stat_01M2KJ7XCF5037JCNPDKKT7NN5.

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Chicago

IQVIA Institute. "U.S. Medicine Use Trends 2026." 2025. https://www.iqvia.com/insights/the-iqvia-institute/reports-and-publications/reports/us-medicine-use-trends-2026. Accessed September 15, 2026. Cited from StatOrigin, https://statorigin.org/stat/stat_01M2KJ7XCF5037JCNPDKKT7NN5.

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BibTeX

@misc{iqvia2025unfilledkt7nn5, author = {{IQVIA Institute}}, title = {U.S. Medicine Use Trends 2026}, year = {2025}, howpublished = {StatOrigin, https://statorigin.org}, url = {https://statorigin.org/stat/stat_01M2KJ7XCF5037JCNPDKKT7NN5}, note = {Original source: https://www.iqvia.com/insights/the-iqvia-institute/reports-and-publications/reports/us-medicine-use-trends-2026. Accessed September 15, 2026.} }

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Record last modified 15 September 2026. Value type: actual. Update cadence: annual. This page is permanently addressable at statorigin.org/stat/stat_01M2KJ7XCF5037JCNPDKKT7NN5.