Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the blood and reduce the risk of heart disease. It is important to know which medications can interact with Lipitor to avoid any potential adverse effects.

According to the sources provided, there are several medications that can interact with Lipitor. These include:

1. Cyclosporine: Taking Lipitor with cyclosporine can increase the levels of Lipitor in the blood, which can lead to an increased risk of side effects.

2. Gemfibrozil: Gemfibrozil can increase the levels of Lipitor in the blood, which can lead to an increased risk of side effects.

3. Clarithromycin and erythromycin: These antibiotics can increase the levels of Lipitor in the blood, which can lead to an increased risk of side effects.

4. HIV medications: Some HIV medications, such as ritonavir and lopinavir/ritonavir, can increase the levels of Lipitor in the blood, which can lead to an increased risk of side effects.

5. Antifungal medications: Some antifungal medications, such as itraconazole and ketoconazole, can increase the levels of Lipitor in the blood, which can lead to an increased risk of side effects.

6. Warfarin: Taking Lipitor with warfarin can increase the risk of bleeding.

It is important to inform your healthcare provider about all the medications you are taking, including prescription and over-the-counter medications, as well as any herbal supplements, before starting Lipitor. This can help avoid any 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