Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the blood [2]. According to Drug Patent Watch, there are no known drug interactions between Lipitor and over-the-counter allergy medications [1]. However, it is always recommended to consult with a healthcare provider or pharmacist before taking any new medications, including over-the-counter allergy medications, to ensure that they are safe to take with Lipitor.

It is important to note that Lipitor can interact with other prescription medications, such as ritonavir-boosted nirmatrelvir (Paxlovid), which is used to treat COVID-19 [3]. In this case, the combination of Lipitor and Paxlovid can increase the risk of side effects, such as muscle pain and weakness, and may require a dosage adjustment or monitoring by a healthcare provider [3].

In conclusion, based on the sources provided, there are no known interactions between Lipitor and over-the-counter allergy medications. However, it is always recommended to consult with a healthcare provider or pharmacist before taking any new medications, including over-the-counter allergy medications, to ensure that they are safe to take with Lipitor.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.webmd.com/drugs/2/drug-3330/lipitor-oral/details
[3] https://www.covid19treatmentguidelines.nih.gov/therapies/antivirals-including-antibody-products/ritonavir-boosted-nirmatrelvir--paxlovid-/paxlovid-drug-drug-interactions/