Lipitor is a brand name for the drug atorvastatin, which belongs to a class of drugs called statins that are used to lower cholesterol levels in the body [1]. According to a study published in the Journal of Lipid Research, statins such as Lipitor can cause a decrease in the production of bile acids in the liver [2]. Bile acids are produced by the liver and are essential for the digestion and absorption of fats in the intestine. However, the study found that the decrease in bile acid production caused by statins was not significant enough to cause any adverse effects on digestion [2].

The Texas Heart Institute explains that statins work by blocking an enzyme in the liver that is responsible for producing cholesterol, which leads to a decrease in cholesterol levels in the blood [3]. The institute also notes that statins have been shown to have other beneficial effects on the body, such as reducing inflammation and improving the function of the cells lining the blood vessels [3].

In summary, while statins such as Lipitor can cause a decrease in bile acid production in the liver, this decrease is not significant enough to cause any adverse effects on digestion. The primary function of statins is to lower cholesterol levels in the blood by blocking an enzyme in the liver. Statins have also been shown to have other beneficial effects on the body, such as reducing inflammation and improving blood vessel function.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4242450/
[3] https://www.texasheart.org/heart-health/heart-information-center/topics/statins-cholesterol-lowering-medicines/