Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels and reduce the risk of heart disease [1]. As with any medication, there may be potential side effects associated with its use. According to the NHS, some of the common side effects of atorvastatin include headache, muscle pain, joint pain, nausea, and diarrhea [2]. The Mayo Clinic notes that more serious side effects are rare but may include liver problems, muscle damage, and an increased risk of diabetes [3]. It is important to note that the benefits of taking atorvastatin generally outweigh the potential risks for most people who need it. However, it is always recommended to discuss any concerns or potential side effects with a healthcare provider.

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