Abstract
Purpose
A substantial percentage of patients report intolerance or side effects of statin treatment leading to treatment changes or discontinuation. The purpose of this study was to examine statin therapy changes and subsequent effects on low-density lipoprotein cholesterol (LDL-C) among patients with statin intolerance (SI).
Methods
We identified 45,037 adults from Kaiser Permanente Southern California with SI documented between 2006 and 2012. Changes in statin therapy in the year before and after the SI index date were examined. We categorized patients into those who initiated statin therapy, discontinued, up-titrated, down-titrated, or did not switch therapy. We calculated the percentage change in LDL-C from the year before to the year after SI, and the percentage of patients attaining LDL-C < 100 and < 70 mg/dL.
Results
In the year prior to the SI date, 77.8% of patients filled a statin prescription. Following SI, 44.6% had no treatment change, 25.5% discontinued, and 30.0% altered their statin therapy. Of those who altered statin therapy, 52.6% down-titrated and 17.2% up-titrated their dose. Rhabdomyolysis was documented in < 1% of the cohort. The largest changes in LDL-C were experienced by patients who were on a high-intensity statin then discontinued treatment (35.6% increase) and those who initiated a high-intensity statin (25.5% decrease). The proportion of patients achieving LDL-C < 100 mg/dL and LDL-C < 70 mg/dL was the lowest among those who discontinued therapy.
Conclusions
Although adjustments to the statin dosage may be appropriate upon documentation of SI, many of these patients will have high LDL-C. Strategies for LDL-C reduction in patients with SI may be necessary.



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Funding
This study was funded by a contractual agreement between the Southern California Permanente Medical Group and Amgen Corporation.
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Teresa N. Harrison, Jin-Wen Y. Hsu, Rong Wei, and Ronald D. Scott declare that they have no conflict of interest. Robert S. Rosenson has received research grants from Akcea, Amgen, Astra Zeneca, Medicines Company, and Regeneron, speaker honorarium from Kowa and Pfizer, royalties from UpToDate, and is a member of advisory boards for Amgen, C5, CVS Caremark, Easy Vitals, Regneron, and Sanofi. Emily B. Levitan has received research funding from Amgen Inc., served on advisory boards for Amgen, and consulted for research projects funded by Novartis. T. Craig Cheetham has received research support from Bristol Myers-Squibb and Pfizer. Kristi Reynolds and Paul Muntner have received research support from Amgen.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study, formal consent was not required.
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Harrison, T.N., Hsu, JW.Y., Rosenson, R.S. et al. Unmet Patient Need in Statin Intolerance: the Clinical Characteristics and Management. Cardiovasc Drugs Ther 32, 29–36 (2018). https://doi.org/10.1007/s10557-018-6775-0
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DOI: https://doi.org/10.1007/s10557-018-6775-0