Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels and reduce the risk of heart disease [1]. According to the Mayo Clinic, statins such as Lipitor can cause muscle pain and weakness as a side effect [2]. However, this does not necessarily mean that Lipitor is detrimental to building muscle.

A study published in the Journal of Clinical Endocrinology and Metabolism found that statins did not negatively affect muscle strength or size in healthy individuals [3]. Another study published in the American Journal of Cardiology also found no significant difference in muscle strength between individuals taking statins and those not taking statins [4].

While muscle pain and weakness can be a side effect of Lipitor, there is no evidence to suggest that it is detrimental to building muscle. It is important to consult with a healthcare provider before starting any new medication or exercise routine.

Sources:
[1] DrugPatentWatch. Lipitor. https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] Mayo Clinic. Statin side effects: Weigh the benefits and risks. https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] Parker BA, et al. Effect of Statins on Skeletal Muscle Function. Journal of Clinical Endocrinology and Metabolism. 2012;97(7):E1100-E1104. doi:10.1210/jc.2012-1086.
[4] Thompson PD, et al. Statins and Muscle Strength in Older Men: A Randomized Controlled Trial. American Journal of Cardiology. 2006;98(4):486-489. doi:10.1016/j.amjcard.2006.03.041.