Lipitor is a medication used to lower cholesterol levels in the blood. According to DrugPatentWatch [1], the most common side effects of Lipitor (atorvastatin) are headache, muscle pain, diarrhea, and nausea. These side effects are usually mild and go away on their own. However, there are some serious side effects that have been reported.

One of the most serious side effects of Lipitor is muscle damage, which can lead to a condition called rhabdomyolysis. This condition occurs when muscle fibers break down and release a protein called myoglobin into the bloodstream. This can cause kidney damage and even kidney failure. The NHS [2] states that this is a rare side effect, but it is more likely to occur in people who take high doses of Lipitor or who have kidney problems.

Another serious side effect of Lipitor is liver damage. This is also rare, but it can be serious. Symptoms of liver damage include yellowing of the skin or eyes, dark urine, and abdominal pain. If you experience any of these symptoms, you should contact your doctor immediately.

Other less common side effects of Lipitor include memory loss, confusion, and diabetes. According to DrugWatch [3], there have been reports of Lipitor causing an increased risk of diabetes, particularly in women.

In conclusion, while Lipitor is generally considered safe and effective, there are some serious side effects that can occur. Muscle damage and liver damage are rare but serious side effects that require immediate medical attention. If you experience any side effects while taking Lipitor, you should contact your doctor right away.

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/