The study showed the risk of most listed side-effects of statins were minimal while the benefits far outweighed potential harms. umar Sriskandan/AlamyThe study showed the risk of most listed side-effects of statins were minimal while the benefits far outweighed potential harms. umar Sriskandan/AlamyMost statin side-effects not caused by the drugs, study findsWhile labels list dozens of possible risks only four are supported by evidence, say researchers Almost all side-effects listed for statins are not caused by the drugs, according to the world’s most comprehensive review of evidence. Other than the well-known risks around muscle pain and diabetes, only four of 66 other statin side-effects listed on labels – liver test changes, minor liver abnormalities, urine changes and tissue swelling – are supported by evidence.