Yes, there are generic versions of Lipitor available. According to Drug Patent Watch [1], the patent for Lipitor expired in November 2011, which opened the door for other pharmaceutical companies to manufacture and sell generic versions of the drug. One such generic version is atorvastatin, which is produced by various manufacturers and sold under different brand names [2].

Switching to a generic version of Lipitor, such as atorvastatin, can be a cost-effective option for those who are looking to save money on their medication. According to a blog post on Harvard Health Publishing [3], the generic version of Lipitor is just as safe and effective as the brand-name version, and can cost significantly less. The article also notes that the FDA requires generic drugs to be bioequivalent to the brand-name version, meaning that they must have the same active ingredients, strength, dosage form, and route of administration.

Everyday Health [4] also confirms that atorvastatin is a generic version of Lipitor, and notes that it is used to lower cholesterol levels in the blood and reduce the risk of heart attack and stroke. The article provides information on the recommended dosage, potential side effects, and precautions to take when using atorvastatin.

In conclusion, there are generic versions of Lipitor available, including atorvastatin, which is produced by various manufacturers and sold under different brand names. Switching to a generic version of Lipitor can be a cost-effective option, and the FDA requires generic drugs to be bioequivalent to the brand-name version, meaning that they must have the same active ingredients, strength, dosage form, and route of administration.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.health.harvard.edu/heart-health/switching-to-generic-lipitor-201202064195
[3] https://www.everydayhealth.com/drugs/lipitor
[4] https://www.everydayhealth.com/drugs/atorvastatin