Lipitor is a brand name for atorvastatin, a medication used to treat high cholesterol levels. According to the Mayo Clinic [2], some common side effects of atorvastatin include diarrhea, indigestion, and stomach pain. However, stomach discomfort is not a commonly reported side effect of atorvastatin.

A study published in the Journal of Pharmacy and Bioallied Sciences [3] found that gastrointestinal symptoms such as nausea, vomiting, and abdominal pain were reported in less than 5% of patients taking atorvastatin. The study also noted that these symptoms were generally mild and did not require discontinuation of the medication.

It is important to note that everyone's experience with medication can be different, and some individuals may experience side effects that are not commonly reported. If you are experiencing stomach discomfort while taking Lipitor or any other medication, it is important to speak with your healthcare provider to determine the cause and appropriate treatment.

Sources:
[2] Mayo Clinic. Atorvastatin (Oral Route) Side Effects. Retrieved from https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/side-effects/drg-20067003
[3] Gupta, R., Sharma, P., & Gupta, N. (2015). Atorvastatin and Rosuvastatin: A Comparative Study of Safety and Efficacy in Hyperlipidemic Patients. Journal of Pharmacy & Bioallied Sciences, 7(Suppl 1), S50–S53. doi: 10.4103/0975-7406.155868