Lipitor (atorvastatin) is a medication used to treat high cholesterol levels in the blood. It is important to be aware of potential drug interactions when taking Lipitor, as they can affect the effectiveness and safety of the medication.

According to DrugPatentWatch [1], there are several medications that can interact with Lipitor. These include:
- Antifungal medications such as itraconazole and ketoconazole
- Antibiotics such as erythromycin and clarithromycin
- HIV medications such as ritonavir and lopinavir
- Heart medications such as amiodarone and diltiazem
- Hepatitis C medications such as telaprevir and boceprevir
- Grapefruit juice

GoodRx [2] lists some additional medications that can interact with Lipitor, including:
- Blood thinners such as warfarin and heparin
- Birth control pills containing estrogen
- Immunosuppressant medications such as cyclosporine and tacrolimus
- Niacin (vitamin B3)

Drugs.com [3] also notes that alcohol and certain foods can interact with Lipitor, and advises patients to avoid excessive alcohol consumption and to consult with their doctor or pharmacist about dietary restrictions.

It is important for patients taking Lipitor to inform their doctor or pharmacist about all medications, supplements, and vitamins they are taking to avoid potential drug interactions. They should also read the medication guide provided with Lipitor and follow the dosing instructions carefully.

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