According to the sources provided, switching to generic Lipitor could result in significant savings.

Lipitor is a brand-name drug that was once protected by patents, which prevented other companies from producing and selling generic versions. However, as of November 2011, the patent for Lipitor expired, allowing other companies to produce and sell generic versions of the drug [1].

The cost of generic Lipitor is significantly lower than the brand-name version. According to a study published in the Journal of Managed Care Pharmacy, the cost of generic atorvastatin (the active ingredient in Lipitor) was 80% lower than the cost of brand-name Lipitor [2].

The New York Times reported in 2005 that the introduction of generic Lipitor was expected to result in significant savings for consumers and insurance companies. At the time, Lipitor was the best-selling drug in the world, with sales of over $10 billion per year. The introduction of generic Lipitor was expected to reduce the cost of the drug by up to 80% [3].

Therefore, if you switch to generic Lipitor, you could potentially save up to 80% on the cost of the medication. However, the actual cost savings will depend on factors such as your insurance coverage, the pharmacy you use, and the specific generic version of the drug that you purchase. It is important to consult with your healthcare provider and insurance company to determine the most cost-effective option for your individual situation.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://pubmed.ncbi.nlm.nih.gov/22389921/
[3] https://www.nytimes.com/2005/10/15/business/lipitor-or-generic-billiondollar-battle-looms.html