Lipitor is a medication used to lower cholesterol levels in the blood. According to Drug Patent Watch [1], the active ingredient in Lipitor is atorvastatin, which works by blocking an enzyme that produces cholesterol in the liver. While the medication is generally well-tolerated, some people may experience side effects. The Mayo Clinic [2] reports that common side effects of statins, including Lipitor, include digestive problems such as nausea, diarrhea, and constipation. However, these side effects are usually mild and go away on their own. In rare cases, statins may cause more serious digestive problems, such as liver damage or pancreatitis.

A study published in the US National Library of Medicine [3] found that while statins can cause digestive side effects, these are generally mild and do not require discontinuation of the medication. The study also found that statins may have a protective effect on the digestive system, reducing the risk of conditions such as inflammatory bowel disease and colorectal cancer.

In conclusion, while Lipitor and other statins can cause mild digestive side effects such as nausea, diarrhea, and constipation, these are usually temporary and not serious. However, in rare cases, more serious digestive problems may occur. It is important to talk to a healthcare provider if you experience any side effects while taking Lipitor or any other medication.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4305860/