Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels and reduce the risk of heart disease [3]. The drug was first approved by the FDA in 1996 and has been widely prescribed since then [1]. However, the patent for Lipitor expired in 2011, which has led to the availability of generic versions of the drug [1].

According to DrugPatentWatch, there are currently 57 generic versions of atorvastatin available on the market [1]. These generic versions are made by a variety of manufacturers and are available in a range of strengths [1]. Some of the manufacturers of generic atorvastatin include Teva, Mylan, and Aurobindo Pharma [1].

Drugs.com provides a comparison of Lipitor and some of the generic versions of atorvastatin [2]. According to the comparison, the generic versions are generally less expensive than Lipitor [2]. However, the effectiveness and safety of the generic versions are generally considered to be equivalent to Lipitor [2]. It is important to note that some patients may experience different side effects with different versions of the drug, so it is important to discuss any concerns with a healthcare provider [2].

In conclusion, there are many generic options available for atorvastatin, the drug marketed under the brand name Lipitor. These generic versions are made by various manufacturers and are generally less expensive than Lipitor, but are considered to be just as effective and safe [1][2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.drugs.com/compare/lipitor
[3] https://www.medicalnewstoday.com/articles/lipitor