Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the blood. While it is generally well-tolerated, there are some potential adverse effects associated with its use.

According to DrugPatentWatch [1], the most common side effects of Lipitor are headache, muscle pain, joint pain, and nausea. These side effects are usually mild and go away on their own. However, there are some more serious side effects that can occur, although they are rare. These include liver problems, muscle damage, and an increased risk of diabetes.

DrugWatch [2] also notes that Lipitor can cause muscle damage, which can lead to kidney failure. This is more likely to occur in people who take high doses of the drug or who have kidney problems. Additionally, Lipitor can cause liver damage, which can be serious and even life-threatening in rare cases. Symptoms of liver damage include yellowing of the skin or eyes, dark urine, and abdominal pain.

The NHS [3] lists additional potential side effects of atorvastatin, including constipation, diarrhea, indigestion, and a rash. These side effects are usually mild and go away on their own.

In conclusion, while Lipitor is generally well-tolerated, there are some potential adverse effects associated with its use. The most common side effects are mild and go away on their own, but there is a risk of more serious side effects such as liver problems, muscle damage, and an increased risk of diabetes. It is important to talk to your doctor if you experience any side effects while taking Lipitor.

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