Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels and reduce the risk of heart disease. Like all medications, Lipitor can cause side effects. According to the Mayo Clinic [3], common side effects of Lipitor include headache, muscle pain, weakness, and diarrhea. However, rare side effects can also occur.

One rare side effect of Lipitor is liver damage. According to Drug Patent Watch [1], Lipitor has been associated with cases of liver failure, although this is very rare. Symptoms of liver damage can include yellowing of the skin or eyes, dark urine, and abdominal pain. If these symptoms occur, it is important to seek medical attention immediately.

Another rare side effect of Lipitor is muscle damage. This can lead to a condition called rhabdomyolysis, which can cause muscle pain, weakness, and kidney damage. Medical News Today [2] reports that this side effect is more likely to occur in people who take high doses of Lipitor or who have kidney problems.

Other rare side effects of Lipitor include allergic reactions, memory loss, and confusion. It is important to talk to a doctor if any unusual symptoms occur while taking Lipitor. In some cases, it may be necessary to stop taking the medication or switch to a different one.

In conclusion, while Lipitor is generally considered safe and effective for lowering cholesterol, it can cause rare side effects such as liver damage, muscle damage, allergic reactions, memory loss, and confusion. It is important to be aware of these potential side effects and to talk to a doctor if any unusual symptoms occur.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.medicalnewstoday.com/articles/drugs-lipitor-side-effects
[3] https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/side-effects/drg-20067003