Lipitor is a brand name for the drug atorvastatin, which is a type of medication known as a statin. Statins are used to lower cholesterol levels in the blood, which can help reduce the risk of heart disease and stroke [3]. According to the Drug Patent Watch [1], Lipitor is one of the most commonly prescribed statins in the United States.

There is some evidence to suggest that statins, including Lipitor, may have an impact on muscle mass gains. A study published in the Journal of Cachexia, Sarcopenia and Muscle found that statins may interfere with the process of muscle protein synthesis, which could potentially limit muscle growth [2]. However, the study authors note that more research is needed to fully understand the effects of statins on muscle mass.

The Mayo Clinic [3] lists muscle pain and weakness as potential side effects of statin use, including Lipitor. However, the clinic notes that these side effects are relatively rare and usually go away once the medication is stopped. The clinic also advises that people who are taking statins and experiencing muscle pain or weakness should talk to their doctor, as this could be a sign of a more serious condition called rhabdomyolysis.

In conclusion, while there is some evidence to suggest that statins like Lipitor may have an impact on muscle mass gains, more research is needed to fully understand this relationship. It is important for people who are taking Lipitor to be aware of the potential side effects, including muscle pain and weakness, and to talk to their doctor if they experience any symptoms.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3463373/
[3] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013