A case of elevated low-density lipoprotein cholesterol (LDL-C) concentration in a patient taking fish oil supplements for hypertriglyceridemia has been reported in the Annals of Pharmacotherapy.
A 63-year-old white woman had been taking 2.7 g of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) daily in 9 g of over-the-counter (OTC) fish oil capsules for triglyceride lowering. Prior to the adverse event, she had baseline fasting triglyceride (TG) and LDL-C concentrations of 278 mg/dL and 106 mg/dL, respectively. After 6 weeks of treatment with fish oil, fasting TG levels decreased by 47.5% (-132 mg/dL) and the LDL-C increased by 75% (+80 mg/dL). Discontinuation of therapy for 6 weeks resulted in TG returning to high concentrations (334 mg/dL; +56 mg/dL change from baseline) and LDL-C decreasing toward baseline (143 mg/dL; +37 mg/dL change from baseline).
This case documents a much higher LDL-C elevation associated with OTC fish oil supplementation than has been previously identified in the literature. Healthcare providers should be advised that LDL-C levels may increase with use of OTC fish oil and should monitor patients periodically for such elevations. The significance of this increase on clinical outcomes is not known.
Source: http://www.theannals.com/cgi/content/abstract/41/7/1296
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