Futurity -- JOHNS HOPKINS (US) — Cholesterol-lowering statins, the most common class of medication in the U.S., appear to trigger a rare but serious autoimmune muscle disease in a small number of the 30 million Americans who take them. Statins, researchers say, can sometimes cause the body to produce antibodies against its own proteins, creating a condition that gets progressively worse—not better—even after the medication is discontinued.