Lipitor is a brand name for atorvastatin, which is a medication used to lower cholesterol levels in the blood. According to the sources provided, it appears that Lipitor has become cheaper over time.

One reason for this is that the patent for Lipitor expired in 2011, which allowed other companies to start producing generic versions of the drug [1]. Generic medications are usually cheaper than their brand name counterparts because they don't require the same research and development costs.

According to GoodRx, a website that compares prescription drug prices, the average retail price for a 30-day supply of Lipitor 20mg in the United States is currently around $10 [2]. This is significantly cheaper than the brand name version of the drug, which can cost hundreds of dollars for a 30-day supply.

In addition to the availability of generic versions, some pharmacies and drug manufacturers offer discounts and coupons for Lipitor. For example, Pfizer, the company that originally developed Lipitor, has a program that allows eligible patients to get the drug for free [3].

Overall, it appears that Lipitor has become cheaper over time due to the availability of generic versions and discounts. However, it's important to note that prices can vary depending on location and individual circumstances, so it's always a good idea to compare prices and check for discounts before purchasing any medication.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/lipitor
[3] https://www.npr.org/sections/health-shots/2012/09/12/160997059/how-cheap-can-lipitor-get-try-free