The cost of generic Lipitor, also known as atorvastatin, can vary depending on various factors such as the pharmacy, location, and dosage. According to GoodRx [2], the average retail price for a 30-day supply of atorvastatin is around $14.31. However, the price can be as low as $4 with a coupon or discount card. The website also provides a list of pharmacies and their prices for atorvastatin in different dosages.

SingleCare [3] also provides information on the cost of atorvastatin without insurance. The website states that the average cost of atorvastatin without insurance is around $39. However, with the SingleCare discount card, the price can be as low as $4. The website also provides a list of pharmacies and their prices for atorvastatin in different dosages.

Drug Patent Watch [1] provides information on the expiration date of Lipitor's patent. The patent for Lipitor expired in November 2011, allowing other pharmaceutical companies to produce and sell generic versions of atorvastatin. This competition has led to a decrease in the price of atorvastatin.

In conclusion, the cost of generic Lipitor, or atorvastatin, can vary depending on various factors such as the pharmacy, location, and dosage. However, with coupons, discount cards, and competition from other pharmaceutical companies, the price can be as low as $4 for a 30-day supply.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/atorvastatin
[3] https://www.singlecare.com/blog/atorvastatin-without-insurance/