Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. While it is generally well-tolerated, some individuals may experience muscle strains as a side effect.

According to a study published in the Journal of Clinical Lipidology [2], muscle-related adverse effects, such as muscle strains, are the most common side effect of atorvastatin. The study found that muscle-related symptoms were reported in up to 10% of patients taking atorvastatin, with the risk increasing with higher doses of the medication.

Symptoms of muscle strains caused by atorvastatin may include muscle pain, weakness, or tenderness. In severe cases, rhabdomyolysis, a condition where muscle fibers break down and release their contents into the bloodstream, may occur [3]. Symptoms of rhabdomyolysis include dark urine, muscle pain, weakness, and fatigue.

It is important to note that muscle strains can also occur for other reasons unrelated to atorvastatin use. Therefore, it is essential to consult a healthcare provider if experiencing any muscle-related symptoms while taking atorvastatin.

In conclusion, muscle strains are a common side effect of atorvastatin, and symptoms may include muscle pain, weakness, or tenderness. In severe cases, rhabdomyolysis may occur. If experiencing any muscle-related symptoms while taking atorvastatin, it is essential to consult a healthcare provider.

Sources:
[2] https://pubmed.ncbi.nlm.nih.gov/37019582/
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4972163/
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR