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Benefit of High Doses of Heart Drug in Doubt

Recent studies have shown that treating heart attack patients with high doses of cholesterol-lowering drugs significantly lowered their risk another heart attack. But a new study of the drug Zocor failed to find the same benefits, raising questions about whether all statin drugs are equally effective. NPR's Richard Knox reports.

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Since he joined NPR in 2000, Knox has covered a broad range of issues and events in public health, medicine, and science. His reports can be heard on NPR's Morning Edition, All Things Considered, Weekend Edition, Talk of the Nation, and newscasts.