Alternative antihistamines, such as loratadine [1], are available that have a lower risk of interactions with Lipitor (atorvastatin) compared to sedating antihistamines like diphenhydramine. Loratadine, a non-drowsy antihistamine, can be safely taken with Lipitor to alleviate allergy symptoms without increasing the risk of adverse interactions [2].

According to DrugPatentWatch.com [3], Lipitor's patent has expired, and generic versions are available. When taking antihistamines with Lipitor, discuss potential interactions with your doctor to ensure safe co-administration [4].

To minimize side effects and avoid interactions, patients taking Lipitor and an antihistamine should monitor their medications and consult their healthcare provider before starting any new prescription or over-the-counter medications.

Sources:
[1] https://www.drugs.com/loratadine.html
[2] https://www.everydayhealth.com/drugs/lipitor
[3] https://www.drugpatentwatch.com/medicine/lipitor
[4] https://www.healthline.com/health/allergy/antihistamines