A common side effect of cholesterol-lowering drugs may finally have a clearer explanation. New research suggests that certain statins can interfere with muscle cells in a way that leads to pain, weakness and fatigue, symptoms that cause many patients to stop taking the medication.
The study found that some statins can bind to a protein involved in muscle contraction, triggering a small but harmful leak of calcium inside muscle cells. This disruption may weaken muscle fibers directly or activate processes that slowly damage muscle tissue, offering a biological explanation for symptoms that have puzzled researchers for decades.
The findings could open the door to safer treatments. By redesigning statins to avoid this interaction or by targeting the calcium leak itself, researchers say it may be possible to preserve the heart-protective benefits of these drugs while reducing the muscle-related side effects that limit their use.
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