Lipitor is a brand-name drug used to lower cholesterol levels in the blood. It is also known as atorvastatin calcium [1]. The patent for Lipitor expired in 2011, which allowed generic versions of the drug to be produced and sold at a lower cost [3]. According to Drug Patent Watch, there are currently 57 generic versions of Lipitor available in the United States [1].

The cost of generic atorvastatin can vary depending on the manufacturer and the pharmacy. A study conducted by the University of Oxford found that the cost of generic atorvastatin can vary by as much as 600% depending on the brand [2]. This variation in price can be attributed to the practice of "ghost-branded generics," where a generic drug is marketed under a brand name by a manufacturer, leading to higher prices [2].

However, despite this variation in price, the availability of generic atorvastatin has led to significant cost savings for patients. According to NPR, when Lipitor went off-patent in 2011, the price of atorvastatin dropped from about $3.50 per pill to around 30 cents per pill [3]. This represents a significant cost savings for patients who require this medication to manage their cholesterol levels.

In conclusion, the availability of generic versions of Lipitor has led to significant cost savings for patients. The cost of generic atorvastatin can vary depending on the manufacturer and the pharmacy, but overall, it is much less expensive than the brand-name version of the drug. Patients should consult with their healthcare provider and pharmacist to determine the most cost-effective option for their individual needs.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.bennett.ox.ac.uk/blog/2018/12/ghost-branded-generics-why-does-the-cost-of-generic-atorvastatin-vary/
[3] https://www.npr.org/sections/health-shots/2011/12/19/142910333/generic-lipitor-now-at-stores-near-you