What Are the Side Effects of Statins?

Statins are among the safest medications in medicine — the vast majority of people who take statins tolerate them without significant side effects and derive meaningful cardiovascular benefit from them. However, statins do have real potential side effects — primarily affecting muscles and, less commonly, the liver and glucose metabolism. Understanding the actual (rather than perceived) risk of statin side effects, how to distinguish true statin-related symptoms from coincidence, and what options exist for statin-intolerant patients helps patients make informed decisions and avoid unnecessarily discontinuing beneficial therapy.

Muscle-Related Side Effects: The Most Common Concern

Muscle symptoms are the most frequently reported and most clinically important statin side effects. The terminology is important:

Myalgia: Muscle pain, aching, weakness, or tenderness — without significant enzyme elevation. The most common reported symptom; affects approximately 5–10% of statin users in clinical practice (though in blinded randomized trials, the rate is much lower — often similar to placebo).