Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the blood. It works by blocking an enzyme in the liver that produces cholesterol. According to the sources provided, there are several medications that can interact with Lipitor.

Drugpatentwatch [1] states that there are 223 drugs that have potential interactions with Lipitor. Some of these drugs include:

- Antibiotics: erythromycin, clarithromycin, telithromycin, and rifampin
- Antifungals: itraconazole, ketoconazole, fluconazole, and voriconazole
- HIV medications: ritonavir, lopinavir, atazanavir, and indinavir
- Heart medications: amiodarone, diltiazem, verapamil, and ranolazine
- Other cholesterol-lowering medications: gemfibrozil and fenofibrate

GoodRx [2] also lists several medications that can interact with Lipitor, including:

- Blood thinners: warfarin and dabigatran
- Calcium channel blockers: amlodipine and nifedipine
- Anti-seizure medications: phenytoin and carbamazepine
- Immunosuppressants: cyclosporine and tacrolimus
- Other cholesterol-lowering medications: niacin and ezetimibe

Drugs.com [3] provides a more detailed list of potential drug interactions with Lipitor. The website advises patients to inform their doctor of all medications they are taking, including prescription drugs, over-the-counter medications, vitamins, and herbal supplements.

In conclusion, Lipitor can interact with several medications, including antibiotics, antifungals, HIV medications, heart medications, blood thinners, calcium channel blockers, anti-seizure medications, immunosuppressants, and other cholesterol-lowering medications. It is important for patients to inform their doctor of all medications they are taking to avoid potential drug interactions.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/atorvastatin/interactions
[3] https://www.drugs.com/drug-interactions/atorvastatin,lipitor.html