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Capecitabine-Induced Severe Hypertriglyceridemia: Report of Two Cases

Resident of Internal Medicine, Department of Internal Medicine, Faculty of Medicine, Hacettepe University, Ankara, Turkey

Melih O Babaoglu, MD

Associate Professor of Pharmacology, Department of Pharmacology, Faculty of Medicine, Hacettepe University

Umit Yasar, MD

Associate Professor of Pharmacology, Department of Pharmacology, Faculty of Medicine, Hacettepe University

Ali Shorbagi, MD

Resident of Internal Medicine, Department of Internal Medicine, Faculty of Medicine, Hacettepe University

Nilufer Guler, MD

Professor of Internal Medicine, Department of Medical Oncology, Institute of Oncology, Faculty of Medicine, Hacettepe University

Reprints: Dr. Kurt, Department of Internal Medicine, Faculty of Medicine, Hacettepe University, 06100-Sihhiye, Ankara, Turkey, fax 90-312-3242009, mkurt{at}hacettepe.edu.tr

OBJECTIVE: To report 2 cases of severe hypertriglyceridemia associated with the use of oral capecitabine.

CASE SUMMARIES: The first patient was a 73-year-old woman with metastatic breast carcinoma who received capecitabine 2500 mg/m²/day in 2 divided doses for 2 weeks followed by a one week rest period. The baseline triglyceride level was 324 mg/dL; after 2 cycles of capecitabine, levels increased to 916 mg/dL. Although lipid-lowering treatment was initiated, triglyceride levels peaked at 1782 mg/dL by the end of the seventh cycle. Eight weeks after capecitabine treatment was stopped, triglyceride levels decreased to 118 mg/dL. The second patient was a 59-year-old man with metastatic colorectal carcinoma who was placed on capecitabine treatment at a dosage of 2500 mg/m²/day in 2 divided doses for 2 weeks followed by a one week rest period. The baseline triglyceride level was 244 mg/dL; levels peaked at 1455 mg/dL at the end of the fifth cycle. Capecitabine treatment was discontinued due to disease progression, and triglyceride levels decreased to 154 mg/dL after 11 weeks.

DISCUSSION: The most frequently reported adverse effects of capecitabine are gastrointestinal and hematologic effects and palmar–plantar erythrodysesthesia. Drug-induced hyperlipidemia may appear more readily in individuals with hereditary lipoprotein lipase deficiency because decreased lipoprotein lipase activity might make these individuals more susceptible to a rise in triglyceride levels. The Naranjo probability scale indicated a probable relationship between capecitabine and severe hypertriglyceridemia.

CONCLUSIONS: Capecitabine should be prescribed with care, especially in patients with preexisting hypertriglyceridemia. The question of whether capecitabine actually causes hypertriglyceridemia needs careful consideration, and the possible mechanism by which it may cause this adverse effect requires further investigation.

Key Words: capecitabine, hypertriglyceridemia

Published Online, January 3, 2006. www.theannals.com, DOI 10.1345/aph.1G348

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