Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. According to the sources provided, Lipitor has a range of potential side effects that patients should be aware of.

Common side effects of Lipitor include headache, diarrhea, nausea, and muscle and joint pain [1][2][3]. These side effects are usually mild and go away on their own after a short time. However, if they persist or become severe, patients should contact their doctor.

In some cases, Lipitor can cause more serious side effects. These can include liver problems, such as hepatitis or jaundice, and muscle damage, which can lead to kidney failure [2][3]. Patients who experience symptoms such as yellowing of the skin or eyes, dark urine, or unexplained muscle pain or weakness should seek medical attention immediately.

Other potential side effects of Lipitor include memory loss, confusion, and type 2 diabetes [1][3]. While these side effects are rare, patients should still be aware of them and discuss any concerns with their doctor.

It is important for patients taking Lipitor to be aware of the potential side effects and to report any symptoms to their doctor. However, it is also important to remember that many people take Lipitor without experiencing any side effects, and the benefits of the medication in lowering cholesterol levels can outweigh the risks for many patients.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.nhs.uk/medicines/atorvastatin/side-effects-of-atorvastatin/
[3] https://www.drugwatch.com/lipitor/side-effects/