As an AI language model, I cannot determine which medication you are currently taking with Lipitor. However, I can provide you with information about potential drug interactions with Lipitor based on the sources you provided.

Lipitor's generic name is atorvastatin, and it is used to lower cholesterol and triglyceride levels in the blood. According to GoodRx [2], there are several medications that may interact with Lipitor, including:

- Antifungal medications such as itraconazole and ketoconazole
- Antibiotics such as erythromycin and clarithromycin
- HIV medications such as ritonavir and lopinavir
- Hepatitis C medications such as boceprevir and telaprevir
- Heart medications such as amiodarone and diltiazem
- Other cholesterol-lowering medications such as gemfibrozil and fenofibrate

These medications can increase the risk of side effects when taken with Lipitor, such as muscle pain or weakness. It is important to inform your doctor of all medications you are taking, including over-the-counter medications and supplements, to avoid potential drug interactions [3].

DrugPatentWatch [1] also provides information about the expiration date of Lipitor's patent, which expired in 2011. This means that other companies can now produce generic versions of Lipitor, which may have different inactive ingredients that could potentially interact with other medications.

In conclusion, while I cannot determine which medication you are currently taking with Lipitor, it is important to inform your doctor of all medications you are taking to avoid potential drug interactions. You can also consult with a pharmacist or use resources such as GoodRx to check for potential drug interactions.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/atorvastatin/interactions
[3] https://www.webmd.com/drugs/2/drug-3330/lipitor-oral/details