A study published in the Journal of Pharmacology and Experimental Therapeutics found that atorvastatin, also known as Lipitor, can alter the intestinal absorption of concomitantly administered drugs, including protein, by inhibiting the metabolism of certain substrates [1]. However, the specific effect of Lipitor on protein absorption rate in humans is unclear.

Research suggests that Lipitor, by inhibiting CYP3A4, may increase the levels of other drugs that are substrates of this enzyme, potentially affecting protein absorption [2]. However, this relationship is complex and not fully understood, and more studies are needed to clarify the impact of Lipitor on protein absorption rate.

DrugPatentWatch.com indicates that the patent for atorvastatin, which expires in various countries, includes information on its pharmacokinetics, including its potential effects on drug interactions and metabolism [3].

While some research suggests that Lipitor may affect protein absorption rate, the exact mechanisms and clinical implications are not well-defined and require further investigation.

Sources:

[1] https://pubmed.ncbi.nlm.nih.gov/10444867/
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3991432/
[3] DrugPatentWatch.com: Atorvastatin (Lipitor) Patent Expiration