According to the sources provided, there is a possibility of drug interaction between Lipitor and antihistamines. Lipitor (atorvastatin) is a medication used to lower cholesterol levels, while antihistamines are used to relieve allergy symptoms.

Drugs.com [2] states that there is a moderate interaction between Lipitor and allergy relief tablets containing chlorpheniramine, which can increase the risk of side effects such as dizziness, drowsiness, and difficulty concentrating. It is recommended to avoid or limit the use of these medications together, and to consult with a healthcare provider before taking them concurrently.

NHS [3] also advises caution when taking Lipitor with antihistamines, as they may increase the risk of muscle problems such as myopathy and rhabdomyolysis. It is important to inform a healthcare provider of all medications being taken, including over-the-counter and herbal supplements, to avoid potential drug interactions.

Drug Patent Watch [1] provides information on the patent status of Lipitor but does not offer specific guidance on drug interactions with antihistamines.

In conclusion, there is a possibility of drug interaction between Lipitor and antihistamines, and it is recommended to consult with a healthcare provider before taking them together. It is important to inform a healthcare provider of all medications being taken to avoid potential drug interactions.

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.nhs.uk/medicines/atorvastatin/taking-atorvastatin-with-other-medicines-and-herbal-supplements/