There are no known interactions between Lipitor (atorvastatin) and allergy medications, according to the sources provided. However, it is important to note that Lipitor may interact with other medications, such as ritonavir-boosted nirmatrelvir (Paxlovid), which is used to treat COVID-19. This combination can increase the levels of Lipitor in the body, which can increase the risk of side effects. Patients taking Lipitor should inform their healthcare provider of all medications they are taking, including over-the-counter and herbal supplements, to ensure there are no potential interactions. Additionally, patients should follow the dosage and administration instructions provided by their healthcare provider or pharmacist to ensure the safe and effective use of Lipitor.

Sources:
[1] Drug Patent Watch. Lipitor. https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] COVID-19 Treatment Guidelines. Ritonavir-Boosted Nirmatrelvir (Paxlovid) Drug-Drug Interactions. https://www.covid19treatmentguidelines.nih.gov/therapies/antivirals-including-antibody-products/ritonavir-boosted-nirmatrelvir--paxlovid-/paxlovid-drug-drug-interactions/
[3] WebMD. Lipitor Oral: Uses, Side Effects, Interactions, Pictures, Warnings & Dosing. https://www.webmd.com/drugs/2/drug-3330/lipitor-oral/details