See the DrugPatentWatch profile for lipitor

Based on the information available, I was able to find that Walmart does offer Lipitor at a reduced price through their $4 Prescription Program. However, this is not a promotion but a long-term pricing program for certain medications. It's worth noting that this price is not available in all states, and it may change over time.

Additionally, I found that Lipitor's patent expired in 2011, which led to the introduction of generic versions of the drug [1]. This could be a factor in the availability of lower-priced Lipitor at Walmart and other pharmacies.

In conclusion, while there are no promotions specifically for Lipitor at Walmart, the retailer does offer the drug at a reduced price through their $4 Prescription Program. It's always a good idea to check with your local Walmart pharmacy for the most up-to-date pricing information.

Sources:
[1] DrugPatentWatch.com, "Lipitor (Atorvastatin) Patent Expiration and Generic Lipitor", <https://www.drugpatentwatch.com/drugs/lipitor/>