Lipitor is a brand name for atorvastatin, a medication used to lower cholesterol levels. One of the possible side effects of Lipitor is stomach discomfort [2]. However, the sources provided do not give a specific duration for this side effect.

According to the Mayo Clinic, stomach discomfort is a common side effect of atorvastatin, which may occur in up to 10% of people taking the medication [2]. The discomfort can include symptoms such as nausea, diarrhea, and stomach pain.

It is recommended to talk to a doctor if the stomach discomfort lasts longer than a few days or becomes severe. The doctor may adjust the dosage or switch to a different medication to alleviate the symptoms [2].

The sources do not provide information on the specific duration of stomach discomfort caused by Lipitor. Therefore, it is important to talk to a healthcare provider for personalized advice on how to manage this side effect [2].

Sources:
[1] Drug Patent Watch. Lipitor. https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] Mayo Clinic. Atorvastatin (Oral Route) Side Effects. https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/side-effects/drg-20067003
[3] Medical News Today. Lipitor: Uses, Side Effects, and Precautions. https://www.medicalnewstoday.com/articles/drugs-lipitor-side-effects