Lipitor, also known as atorvastatin, is a medication that is used to lower cholesterol levels in the blood. It is classified as a statin, which works by inhibiting an enzyme in the liver that is responsible for producing cholesterol. This leads to a decrease in the amount of cholesterol that is produced and an increase in the amount of cholesterol that is removed from the blood [1].

According to WebMD, Lipitor is used to treat high cholesterol, which can help prevent heart attacks, strokes, and other complications. The medication is taken orally, usually once a day, and is often prescribed in combination with a healthy diet and exercise [2].

However, like all medications, Lipitor can have side effects. According to Drugwatch, some of the most common side effects of Lipitor include muscle pain, weakness, and tenderness, as well as stomach pain, nausea, and diarrhea. More serious side effects can include liver damage, memory loss, and an increased risk of diabetes [3].

It is important to note that not everyone who takes Lipitor will experience side effects, and the benefits of the medication may outweigh the risks for some individuals. It is also important to speak with a healthcare provider before starting or stopping any medication, as they can provide personalized advice and guidance based on an individual's medical history and current health status.

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