Lipitor is a medication used to lower cholesterol levels in the blood [2]. According to DrugPatentWatch, there are no known drug interactions between Lipitor and allergy medications [1]. However, it is important to note that grapefruit juice can interact with Lipitor and some other medications, increasing the risk of side effects [3]. It is recommended to avoid consuming grapefruit or grapefruit juice while taking Lipitor [3]. Therefore, if you are taking an allergy medication that contains grapefruit or grapefruit juice, it is recommended to consult with your healthcare provider to discuss any potential interactions 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.fda.gov/consumers/consumer-updates/grapefruit-juice-and-some-drugs-dont-mix