Lipitor is a medication used to lower cholesterol levels in the blood, specifically low-density lipoprotein (LDL) cholesterol. It is important to discuss any potential side effects with a doctor before starting this medication. According to [2], some of the most common side effects of Lipitor include muscle pain, weakness, and tenderness. These symptoms may be a sign of a serious muscle condition called rhabdomyolysis. Other potential side effects include liver problems, allergic reactions, and digestive issues. It is important to note that not everyone experiences side effects from Lipitor, and the benefits of the medication may outweigh the risks for some individuals. [3] recommends that patients should inform their doctor if they have any history of liver disease, kidney disease, diabetes, or thyroid problems before starting Lipitor. Additionally, it is important to avoid drinking grapefruit juice while taking this medication as it can increase the risk of side effects. [1] provides information on the patent status of Lipitor, which has expired in the United States, meaning that generic versions of the medication are available. It is important to discuss any potential side effects of both brand name and generic versions of Lipitor with a doctor.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.medicalnewstoday.com/articles/drugs-lipitor-side-effects
[3] https://www.webmd.com/drugs/2/drug-3330/lipitor-oral/details