Atorvastatin, the generic name for Lipitor, is a commonly prescribed medication for high cholesterol. While it is generally considered safe and effective, there are some potential side effects to be aware of. According to the NHS [2], common side effects of atorvastatin include headache, nausea, diarrhea, and muscle and joint pain. In rare cases, more serious side effects such as liver problems, kidney failure, and muscle damage can occur. It is important to notify a doctor immediately if any of these symptoms occur.

According to Drugwatch [3], some patients have reported cognitive impairment, memory loss, and confusion while taking atorvastatin. However, the evidence for these side effects is not conclusive and more research is needed to determine if there is a causal relationship between atorvastatin and cognitive impairment.

It is important to note that the benefits of atorvastatin in reducing the risk of heart attack and stroke generally outweigh the potential risks of side effects. However, patients should always discuss any concerns or potential side effects with their doctor before starting any new medication [1].

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/