Lipitor is a brand name for atorvastatin, which is a medication used to lower cholesterol levels in the blood. It belongs to a class of drugs called statins. According to DrugPatentWatch [1], the patent for Lipitor expired in 2011, and since then, several generic versions of atorvastatin have become available. These generic versions include atorvastatin calcium, atorvastatin calcium trihydrate, and atorvastatin magnesium. These generic versions are chemically equivalent to Lipitor and are available at a lower cost.

GoodRx [2] lists several alternatives to Lipitor that are also used to lower cholesterol levels. These include other statins such as simvastatin, pravastatin, and rosuvastatin. Ezetimibe, a medication that inhibits cholesterol absorption in the small intestine, is also listed as an alternative. Bile acid sequestrants, such as cholestyramine and colesevelam, are another option for lowering cholesterol.

Drugs.com [3] provides a comparison chart for Lipitor and its generic versions, as well as other statins such as simvastatin, pravastatin, and rosuvastatin. The chart compares the drugs based on factors such as effectiveness, side effects, and cost.

In conclusion, there are several available substitutes for Lipitor, including generic versions of atorvastatin, other statins such as simvastatin and pravastatin, ezetimibe, and bile acid sequestrants. Patients should consult with their healthcare provider to determine the best option for their individual needs.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/conditions/high-cholesterol/statins-alternatives-medications-for-lowering-high-cholesterol
[3] https://www.drugs.com/compare/lipitor