Lipitor is a brand name for the drug atorvastatin, which is a type of medication used to lower cholesterol levels in the blood. According to the sources provided, some patients may experience side effects from taking Lipitor, particularly at higher dosages.

The most common side effects of atorvastatin include muscle pain, weakness, and tenderness, which can be indicative of a more serious condition called rhabdomyolysis [2]. Other possible side effects may include nausea, diarrhea, constipation, and stomach pain [3]. In rare cases, atorvastatin may cause liver damage or a serious allergic reaction [3].

It is important to note that the risk of experiencing side effects from atorvastatin may be higher in certain populations, such as older adults, people with liver or kidney disease, and those taking other medications that may interact with atorvastatin [2]. Additionally, patients taking higher doses of atorvastatin may be more likely to experience side effects than those taking lower doses [1].

If you are experiencing side effects from atorvastatin, it is important to speak with your healthcare provider to determine the best course of action. Your provider may recommend adjusting your dosage or switching to a different medication to manage your cholesterol levels.

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.nhs.uk/medicines/atorvastatin/side-effects-of-atorvastatin/