Lipitor is a medication used to lower cholesterol levels in the body. It is a statin drug that can have side effects, including rebound effects. Rebound effects occur when a person stops taking a medication, and their body reacts to the sudden change. According to the sources provided, there is no specific information on how long Lipitor rebound effects last.

However, the sources provide some information on Lipitor and its potential side effects. According to Drug Patent Watch [1], Lipitor's patent expired in 2011, and there are now generic versions of the medication available. The article does not provide information on the rebound effects of Lipitor.

Yale Medicine [2] reports that Paxlovid is a medication used to treat COVID-19. The article does not provide information on Lipitor or its rebound effects.

CNN [3] reports on a study that found that statin drugs, including Lipitor, can have side effects, but the benefits of the medication outweigh the risks for most people. The article does not provide information on the rebound effects of Lipitor.

In conclusion, while the sources provide information on Lipitor and its potential side effects, there is no specific information on how long Lipitor rebound effects last. It is important to consult with a healthcare provider before stopping any medication, including Lipitor, to discuss potential side effects and how to safely discontinue use.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.yalemedicine.org/news/13-things-to-know-paxlovid-covid-19
[3] https://www.cnn.com/2017/07/24/health/statins-side-effects-outcomes-study/index.html