There are potential drug interactions between Lipitor (atorvastatin) and antihistamines. According to Drugs.com [2], taking allergy relief tablets with atorvastatin may increase the risk of side effects, such as dizziness, drowsiness, and difficulty concentrating. The website suggests that patients should consult their healthcare provider before taking these medications together.

Additionally, according to the COVID-19 Treatment Guidelines [3], there is a potential interaction between Lipitor and Paxlovid (nirmatrelvir/ritonavir). Paxlovid is a medication used to treat COVID-19. The guidelines state that co-administration of Paxlovid with atorvastatin may increase the risk of atorvastatin-related adverse effects. Therefore, patients taking Lipitor should inform their healthcare provider if they are prescribed Paxlovid or any other medications.

Drug Patent Watch [1] does not provide information about drug interactions, but it is a useful resource for information about drug patents and exclusivity.

In conclusion, Lipitor may interact with antihistamines, and patients should consult their healthcare provider before taking these medications together. Additionally, patients taking Lipitor should inform their healthcare provider if they are prescribed Paxlovid or any other medications.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.drugs.com/drug-interactions/allergy-relief-tablets-with-atorvastatin-1486-14544-276-0.html
[3] https://www.covid19treatmentguidelines.nih.gov/therapies/antivirals-including-antibody-products/ritonavir-boosted-nirmatrelvir--paxlovid-/paxlovid-drug-drug-interactions/