As an AI language model, I cannot switch to a different medication after Lipitor. However, I can provide you with information based on the sources you provided.

Lipitor is a brand name for the drug atorvastatin, which is a type of statin medication used to lower cholesterol levels in the blood. According to Drug Patent Watch [1], Lipitor's patent expired in 2011, which means that generic versions of atorvastatin are now available.

If you have been taking Lipitor and are considering switching to a different medication, it is important to consult with your healthcare provider. A study published by the National Center for Biotechnology Information [2] suggests that switching from one statin medication to another may have different effects on cholesterol levels and may also cause different side effects.

It is also important to note that stopping statin medication without consulting with a healthcare provider can be dangerous. According to GoodRx [3], stopping statins abruptly can increase the risk of heart attack and stroke. Therefore, if you are considering switching to a different medication, it is important to do so under the guidance of a healthcare provider.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/books/NBK548236/
[3] https://www.goodrx.com/classes/statins/stopping-statins-eight-reasons-you-should-not-stop-your-cholesterol-drug