According to the sources provided, indigestion is a possible side effect of taking Lipitor (atorvastatin). The NHS website [2] states that indigestion is a common side effect of taking atorvastatin and may affect up to 1 in 10 people. The Mayo Clinic [3] also lists indigestion as a possible side effect of atorvastatin. The Drug Patent Watch website [1] does not specifically mention indigestion as a side effect of Lipitor, but it does list gastrointestinal disorders as a possible adverse reaction. It is important to note that while indigestion is a possible side effect of Lipitor, not everyone who takes the medication will experience this side effect. If you are experiencing indigestion or any other side effects while taking Lipitor, it is important to speak with your doctor.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.nhs.uk/medicines/atorvastatin/side-effects-of-atorvastatin/
[3] https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/side-effects/drg-20067003