Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the body. According to the Mayo Clinic [2], some common side effects of statins like Lipitor include headache, muscle aches, and digestive problems. However, the same source states that serious side effects are rare and may include liver damage, muscle damage, and an increased risk of diabetes. Patients are advised to report any unexplained muscle pain, tenderness, or weakness to their healthcare provider.

The NHS [3] also lists similar side effects of statins, including muscle pain, digestive problems, and an increased risk of diabetes. However, the source notes that the benefits of taking statins, such as reducing the risk of heart attacks and strokes, usually outweigh the risks of side effects. Patients are advised to speak with their healthcare provider if they have any concerns about taking statins.

DrugPatentWatch [1] provides information on Lipitor's adverse reactions, including muscle weakness, liver damage, and an increased risk of diabetes. The source also notes that rare but serious side effects may include memory loss and confusion.

In conclusion, while Lipitor (atorvastatin) may cause some common side effects such as headache and muscle aches, serious side effects are rare. Patients are advised to report any unexplained muscle pain, tenderness, or weakness to their healthcare provider. Additionally, the benefits of taking statins, such as reducing the risk of heart attacks and strokes, usually outweigh the risks of side effects. However, patients should speak with their healthcare provider if they have any concerns about taking statins.

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.nhsinform.scot/tests-and-treatments/medicines-and-medical-aids/types-of-medicine/statins