Lipitor is a medication used to treat high cholesterol levels in the blood. According to [2], some of the common side effects of Lipitor (atorvastatin) include headache, feeling sick, diarrhoea, constipation, and muscle and joint pain. However, these side effects are usually mild and go away after a few days. In rare cases, Lipitor can cause serious side effects such as liver problems, muscle damage, and an increased risk of diabetes. It is important to seek medical attention if you experience any of these serious side effects.

As per [3], Lipitor can also cause a rare but serious condition called rhabdomyolysis, which can lead to kidney failure. Symptoms of rhabdomyolysis include muscle pain, weakness, and dark urine. If you experience any of these symptoms while taking Lipitor, you should seek medical attention immediately.

It is important to note that not everyone who takes Lipitor will experience side effects. The benefits of taking Lipitor usually outweigh the risks of side effects for most people. However, it is important to talk to your doctor about any concerns you may have about taking Lipitor.

In conclusion, while Lipitor is generally considered safe and effective, it can cause some side effects, including rare but serious ones such as rhabdomyolysis. It is important to talk to your doctor about any concerns you may have about taking Lipitor and to seek medical attention if you experience any serious side effects.

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