Lipitor is a medication that contains atorvastatin, which is a type of drug known as a statin. Statins are used to reduce the level of cholesterol in the blood, which can help prevent heart attacks and strokes. According to the sources provided, Lipitor can reduce the risk of heart attack, stroke, and other cardiovascular problems [1].

However, like any medication, Lipitor can cause side effects. The most common side effects of Lipitor include headache, nausea, diarrhea, muscle pain, and weakness [2]. Additionally, statins can cause liver damage, although this is rare. Patients taking Lipitor should have their liver function monitored regularly by a healthcare professional [3].

Another potential side effect of Lipitor is an increased risk of developing type 2 diabetes. This risk appears to be higher in patients who already have risk factors for diabetes, such as obesity or a family history of the disease. Patients taking Lipitor should be monitored for signs of high blood sugar, such as increased thirst or urination [2].

In summary, Lipitor can reduce the risk of cardiovascular problems, but it can also cause side effects such as headache, nausea, diarrhea, muscle pain, weakness, and liver damage. Patients taking Lipitor should be monitored for signs of high blood sugar and liver damage, and should report any unusual symptoms to 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/