Statins and Risk of New-Onset Diabetes Mellitus

Abstract

For any prescription drug, the potential benefits to health must be balanced against potential risks. Understanding these potential risks can help physicians and patients make informed decisions on whether to use a medication. Recently, statins, a class of medications prescribed to treat high cholesterol levels, have been found to modestly increase the risk of developing diabetes mellitus. It is clear that statins can prevent future major cardiovascular events, such as heart attack, stroke, and deaths from cardiovascular causes, in patients who have had a previous heart attack or those with multiple cardiovascular risk factors. However, the associations between diabetes mellitus and statin use have raised concerns over the widespread use of statin medications in patients at lower risk for cardiovascular disease. In this Patient Page, we describe the indications for statin therapy, the most common adverse effects, and recent concerns about new-onset diabetes mellitus to help patients and providers make more informed decisions about the use of this important class of medications in at-risk individuals. Cardiovascular disease is a major cause of illness and death worldwide. Elevated blood cholesterol levels (specifically the low-density lipoprotein [LDL] cholesterol) are associated with a higher risk of heart attack, stroke, and heart failure. It has become clear that elevated LDL cholesterol levels predict future events, and modern risk scores such as the Framingham Risk Score use LDL cholesterol level as an important predictor of future cardiac events.1 In addition, as new large trials shed light on the important role of LDL in cardiac disease, the optimal LDL cholesterol level has been progressively lowered in national guidelines. Statins are a class of medications called 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitors. These drugs block a critical …