Lipitor is a medication that is used to lower cholesterol levels in the body. According to the sources provided, there are some potential side effects of taking Lipitor.

The first source, Drug Patent Watch [1], mentions that some of the most common side effects of Lipitor include muscle pain, weakness, and tenderness. These side effects can occur in up to 10% of patients taking the medication. Other potential side effects mentioned on this website include headache, nausea, diarrhea, and constipation.

The Mayo Clinic [2] lists some additional potential side effects of Lipitor, including liver damage, memory loss, and confusion. The risk of liver damage is increased in patients who drink alcohol regularly or have a history of liver disease. Memory loss and confusion are less common side effects, but they have been reported in some patients taking Lipitor.

The NHS [3] also mentions some potential side effects of Lipitor, including an increased risk of diabetes and a higher risk of muscle problems. Muscle problems can range from mild muscle pain to a rare but serious condition called rhabdomyolysis, which can cause kidney damage. The NHS advises patients to seek medical attention immediately if they experience severe muscle pain or weakness while taking Lipitor.

In conclusion, while Lipitor is generally considered safe and effective for lowering cholesterol levels, there are some potential side effects that patients should be aware of. These can include muscle pain, weakness, and tenderness, liver damage, memory loss, confusion, an increased risk of diabetes, and muscle problems ranging from mild to severe. Patients who experience any of these side effects while taking Lipitor should consult with their 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/