According to the sources provided, Lipitor has been effective in lowering cholesterol levels. Lipitor is a medication that belongs to the class of drugs called statins, which are used to lower cholesterol levels in the blood. Statins work by blocking an enzyme that the liver uses to produce cholesterol. Lipitor is one of the most widely prescribed statins and has been used to treat high cholesterol for over two decades [1].

The Mayo Clinic states that statins, including Lipitor, have been shown to be effective in lowering cholesterol levels by up to 50%. The effectiveness of statins in reducing the risk of heart attack and stroke has also been well-documented [2]. The Centers for Disease Control and Prevention (CDC) also recommend statins as a first-line treatment for high cholesterol [3].

It is important to note that Lipitor, like all medications, may have side effects and risks. Common side effects of Lipitor include muscle pain and weakness, liver damage, and an increased risk of diabetes. It is important to talk to a healthcare provider about the risks and benefits of taking Lipitor, as well as any other medications, to treat high cholesterol [1].

In conclusion, Lipitor has been shown to be effective in lowering cholesterol levels and reducing the risk of heart attack and stroke. However, it is important to discuss the risks and benefits of taking Lipitor with a healthcare provider.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statins/art-20045772
[3] https://www.cdc.gov/cholesterol/treating_cholesterol.htm