Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels. According to Drug Patent Watch [1], the patent for Lipitor expired in 2011, which means that generic versions of the drug are now available. Pfizer, the manufacturer of Lipitor, has reportedly aimed to keep a third of the market share for the drug [2]. Sanofi in France has been authorized to produce a generic version of atorvastatin [3]. However, it is important to note that the sale of prescription drugs, including Lipitor and its generic versions, is regulated by the FDA in the United States. It is illegal to purchase prescription drugs without a valid prescription from a licensed healthcare provider. Therefore, while generic versions of Lipitor may be available for purchase online, it is important to exercise caution and only purchase from reputable sources with a valid prescription.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.reuters.com/article/us-lipitor/pfizer-aims-to-keep-one-third-of-lipitor-pie-idINTRE7B008A20111201
[3] https://www.gabionline.net/generics/news/Sanofi-France-to-make-generic-atorvastatin