Lipitor, a brand name for atorvastatin, is a prescription medication used to treat high cholesterol and prevent heart disease [2]. According to DrugPatentWatch, the patent for Lipitor expired in November 2011, which means that generic versions of the drug are available [1]. As a result, the price of Lipitor has decreased since then.

The price of atorvastatin can vary depending on the pharmacy, location, and dosage. The average retail price for a 30-day supply of atorvastatin 20mg is $10.40, while the average retail price for a 30-day supply of atorvastatin 40mg is $17.50 [2].

Bulk pricing for atorvastatin is not readily available from the sources provided. However, it is common for bulk purchases to result in lower prices per unit. This is especially true for generic drugs like atorvastatin, which can be purchased in large quantities from wholesalers.

In conclusion, the price of atorvastatin can vary depending on the pharmacy, location, and dosage. The average retail price for a 30-day supply of atorvastatin 20mg is $10.40, while the average retail price for a 30-day supply of atorvastatin 40mg is $17.50. While bulk pricing is not readily available from the sources provided, it is likely that bulk purchases of atorvastatin would result in lower prices per unit [1][2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/books/NBK548236/
[3] https://pubchem.ncbi.nlm.nih.gov/compound/Atorvastatin