Antihistamines are commonly used to treat allergies, while Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the blood. According to Drugs.com, there are no known interactions between Lipitor and antihistamines [3]. However, it is always important to consult with a healthcare provider before taking any new medications, especially if you have any pre-existing medical conditions or are taking other medications.

In a study published in the Journal of Clinical Pharmacology, researchers investigated the potential interactions between atorvastatin and antihistamines. The study found that there were no significant changes in the pharmacokinetics of atorvastatin when administered with antihistamines [2].

It is important to note that while there may not be any known interactions between Lipitor and antihistamines, some antihistamines can cause drowsiness or dizziness, which may be worsened when taken with other medications. Additionally, some antihistamines may interact with other medications or medical conditions. Therefore, it is always important to consult with a healthcare provider before taking any new medications, including antihistamines, especially if you are taking Lipitor [3].

Sources:
[2] https://pubmed.ncbi.nlm.nih.gov/22947909/
[3] https://www.drugs.com/drug-interactions/allergy-relief-tablets-with-atorvastatin-1486-14544-276-0.html