4.7 Review

Side effects of statins: from pathophysiology and epidemiology to diagnostic and therapeutic implications

Journal

CARDIOVASCULAR RESEARCH
Volume 118, Issue 17, Pages 3288-3304

Publisher

OXFORD UNIV PRESS
DOI: 10.1093/cvr/cvac020

Keywords

Statins; Side effects; Myalgia; Nocebo effect; Diabetes mellitus

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Treatment with statins has proven effective in preventing cardiovascular events, but discontinuation due to intolerance and non-adherence remains a major issue. Muscle side effects, such as myalgia, are the most commonly reported, but whether they are a result of the drug's effect is still debated.
Treatment with statins, inhibitors of 3-hydroxy-3-methylglutaryl-coenzyme A reductase, has proven beneficial preventive effects on cardiovascular events. However, discontinuation due to intolerance and non-adherence remain two of the major gaps in both primary and secondary prevention. This leads many patients with high-risk of atherosclerotic cardiovascular disease (ASCVD) to be inadequately treated or not to achieve target lipid level goals, and as consequence they undergo an increased risk of cardiovascular events. The aim of this review is thus to give an overview of the reasons for discontinuation and on the possible mechanisms behind them. Although statins, as a class, are generally safe, they are associated with an increased risk of diabetes mellitus and hepatic transaminase elevations. Incidence of cataracts or cognitive dysfunction and others presented in the literature (e.g. proteinuria and haematuria) have been never confirmed to have a causal link. Conversely, debated remains the effect on myalgia. Muscle side effects are the most commonly reported, although myalgia is still believed by some to be the result of a nocebo/drucebo effect. Concerning mechanisms behind muscular side effects, no clear conclusions have been reached. Thus, if on one side it is important to identify individuals either at higher risk to develop a side effect, or with confirmed risk factors and conditions of statin intolerance, on the other side alternative strategies should be identified to avoid an increased ASCVD risk.

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