Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the blood and reduce the risk of heart disease and stroke. It is important to be aware of potential drug interactions when taking Lipitor to avoid adverse effects and ensure its effectiveness.

According to DrugPatentWatch [1], there are 176 patents for Lipitor, and the drug has been studied in over 400 clinical trials. However, the website does not provide specific information on drug interactions.

Drugs.com [2] and GoodRx [3] both provide a list of drugs that may interact with Lipitor. These include:

1. Other cholesterol-lowering medications, such as gemfibrozil and fenofibrate, which can increase the risk of muscle damage (myopathy) when taken with Lipitor.

2. Antibiotics, such as erythromycin and clarithromycin, which can increase the level of Lipitor in the blood and increase the risk of side effects.

3. Antifungal medications, such as itraconazole and ketoconazole, which can also increase the level of Lipitor in the blood and increase the risk of side effects.

4. HIV medications, such as ritonavir and saquinavir, which can increase the level of Lipitor in the blood and increase the risk of side effects.

5. Blood thinners, such as warfarin, which can increase the risk of bleeding when taken with Lipitor.

6. Other medications, such as cyclosporine and colchicine, which can also interact with Lipitor and increase the risk of side effects.

It is important to inform your healthcare provider of all medications, supplements, and herbal products you are taking before starting Lipitor. Your healthcare provider can help you manage any potential drug interactions and adjust your medications as needed to ensure their safety and effectiveness.

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