Statins are among the most commonly prescribed medicines in the world. Doctors use them to lower cholesterol levels and reduce the risk of heart attacks, strokes, and other serious heart problems.
For millions of people, these medicines have saved lives by helping keep blood vessels healthy and reducing the buildup of fatty plaques inside arteries. Even though statins are very effective, not everyone finds them easy to take. Some people develop muscle pain, weakness, cramps, or feel unusually tired during physical activity.
These problems can make exercise difficult and may even cause some patients to stop taking their medication. Researchers have been trying to understand why these side effects happen for many years. A new study from McMaster University has now provided an important clue.
The findings, published in Science Advances, suggest that muscle side effects are caused by a specific biological pathway that is different from the pathway that lowers cholesterol. This discovery could eventually help scientists create treatments that prevent muscle problems without reducing the heart-protecting benefits of statins.
The research team studied muscle cells and mice to investigate what happens after statins enter the body. They discovered that the medicines can interfere with the way muscle cells produce energy. This energy shortage appears to activate the immune system inside the muscle tissue.
Once activated, the immune response causes inflammation and damage to muscle cells, leading to pain, weakness, and reduced exercise ability. When the researchers blocked this immune response in their experiments, much of the muscle damage was prevented.
This finding surprised the team because it showed that the muscle side effects and the cholesterol-lowering effects are controlled by different biological processes. Around 7% to 29% of people taking statins report muscle-related symptoms, although the severity varies widely.
Many people continue taking the medicine without any problems, while others need a lower dose or a different cholesterol-lowering treatment. The researchers believe their work may help explain why only some people develop these symptoms.
They also discovered an interesting connection between metabolism, which is how cells make and use energy, and the immune system. Changes in energy production appeared to trigger inflammation inside muscle cells themselves.
Although this research was carried out mainly in laboratory models rather than patients, it provides several possible targets for developing future medicines. Review and analysis: The study is important because it identifies a possible cause of statin intolerance rather than simply describing the symptoms.
Its main limitation is that it has not yet been tested in large human clinical trials. If future studies confirm these findings, doctors may one day be able to prevent muscle side effects while allowing more patients to safely continue these life-saving medicines.
If you care about muscle, please read studies about factors that can cause muscle weakness in older people, and scientists find a way to reverse high blood sugar and muscle loss.
For more health information, please see recent studies about an easy, cheap way to maintain muscles, and results showing these vegetables essential for your muscle strength.
Source: McMaster University
