JACKSONVILLE, Fla. — A new study by Mayo Clinic researchers may have broad implications for treatment of patients with predominantly benign thyroid disease and newly treated hypothyroidism.

The study, to be published in Mayo Clinic Proceedings in July, looked at whether generic and brand-name levothyroxine therapy affected hospitalization for cardiovascular events for those patients who are more at risk of coronary heart disease and heart failure. Levothyroxine is the most prescribed medication in the U.S., with more than 23 million prescriptions written annually.

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