According to DrugPatentWatch [1], the patent for Lipitor expired in November 2011, which means that generic versions of atorvastatin, the active ingredient in Lipitor, have been available in the United States since then. GoodRx [2] lists several pharmacies that offer atorvastatin at a significantly lower price than Lipitor, indicating that the generic version is readily available. However, it is important to note that availability may vary depending on the specific area and pharmacy. It is recommended to check with local pharmacies or use the GoodRx website to compare prices and availability in the area. Additionally, a study published in the National Center for Biotechnology Information [3] found that generic atorvastatin was just as effective as Lipitor in reducing cholesterol levels. Overall, it seems that generic atorvastatin is widely available in the United States and can be a cost-effective alternative to Lipitor.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/atorvastatin
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3319770/