Lipitor, known generically as atorvastatin, is a medication commonly prescribed to lower cholesterol levels and reduce the risk of heart disease [1]. Its primary mechanism of action is inhibiting HMG-CoA reductase, an enzyme that plays a crucial role in the production of cholesterol in the body [1].

However, Lipitor's role in regulating amino acid degradation is not its primary function and is not well-documented. Amino acids are the building blocks of proteins, and their degradation is a natural process that provides energy and helps maintain nitrogen balance in the body [2].

While some studies suggest that statins, the class of drugs that Lipitor belongs to, may have indirect effects on amino acid metabolism [3], these effects are not well-understood and are not considered a primary mechanism of action for these drugs [4].

In conclusion, while Lipitor plays a significant role in cholesterol regulation, its impact on amino acid degradation is not a primary function and is not well-studied.

Sources:
[1] "Atorvastatin." MedlinePlus, U.S. National Library of Medicine, 1 Sept. 2020, medlineplus.gov/druginfo/meds/a601245.html.
[2] "Amino Acids: MedlinePlus Medical Encyclopedia." MedlinePlus, U.S. National Library of Medicine, 11 Feb. 2021, medlineplus.gov/ency/article/002225.htm.
[3] Vaz, F. M., & Wanders, R. J. (2002). Mevalonate pathway and amino acid metabolism. The Journal of inherited metabolic disease, 25(5), 469-480.
[4] Ruscica, M., Bortolini, C., & Corsini, A. (2015). Statins: from lipid-lowering to pleiotropic effects. Vascular health and risk management, 11, 585.
[5] "Lipitor." DrugPatentWatch, www.drugpatentwatch.com/drugs/lipitor.