Lipitor, also known as Atorvastatin, is a medication that is used to lower cholesterol levels in the blood. Like all medications, it can cause side effects. According to the Mayo Clinic [2], some common side effects of Lipitor include headache, nausea, diarrhea, constipation, and muscle aches. However, these side effects are not unique to Lipitor and can occur with other statins as well.

The NHS [3] notes that Lipitor can also cause some rare but serious side effects, such as muscle weakness, tenderness, and pain, particularly if the patient is taking high doses of the medication. In rare cases, Lipitor can also cause a serious condition called rhabdomyolysis, which is the breakdown of muscle tissue that can lead to kidney damage or failure.

According to Drug Patent Watch [1], Lipitor's label includes warnings about potential liver damage and the risk of developing type 2 diabetes. However, it's important to note that these side effects are not unique to Lipitor and can occur with other statins as well.

In summary, while Lipitor can cause some common side effects like headache, nausea, and muscle aches, there are no unique side effects that are specific to Lipitor alone. Patients taking Lipitor should be aware of the potential for rare but serious side effects such as muscle weakness, tenderness, and rhabdomyolysis. It's important to discuss any concerns or questions about Lipitor's side effects with a healthcare provider.

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/