Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the blood. It is important to be aware of potential drug interactions when taking Lipitor to avoid any harmful effects.

According to Drug Patent Watch [1], there are no known drug interactions with Lipitor that are considered serious or life-threatening. However, it is recommended to avoid taking Lipitor with certain medications that can increase the risk of side effects or reduce its effectiveness. These medications include:

- Antibiotics such as erythromycin, clarithromycin, and telithromycin
- Antifungal medications such as ketoconazole and itraconazole
- HIV medications such as ritonavir and saquinavir
- Hepatitis C medications such as boceprevir and telaprevir

Everyday Health [2] provides a more comprehensive list of medications that may interact with Lipitor. These include:

- Other cholesterol-lowering medications such as gemfibrozil and fenofibrate
- Blood thinners such as warfarin and heparin
- Immunosuppressants such as cyclosporine and tacrolimus
- Calcium channel blockers such as amlodipine and diltiazem
- Certain antidepressants such as nefazodone and fluoxetine

GoodRx [3] also lists some medications that may interact with Lipitor. These include:

- Birth control pills containing estrogen
- Grapefruit juice

It is important to inform your healthcare provider of all medications, supplements, and vitamins you are taking before starting Lipitor to avoid any potential interactions. Your healthcare provider may need to adjust your medication regimen or monitor you more closely for side effects.

Sources:
1. https://www.drugpatentwatch.com/p/tradename/LIPITOR
2. https://www.everydayhealth.com/drugs/lipitor
3. https://www.goodrx.com/atorvastatin/interactions