Lipitor (atorvastatin) is a medication that is used to lower cholesterol levels in the blood. There are certain medications that should be avoided when taking Lipitor.

According to the drug interaction checker on GoodRx [2], there are several medications that should not be taken with Lipitor, including:

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

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

3. Protease inhibitors: These medications are used to treat HIV and can also increase the levels of Lipitor in the blood.

4. Clarithromycin and erythromycin: These antibiotics can increase the levels of Lipitor in the blood and increase the risk of side effects.

5. Antifungal medications: Some antifungal medications, such as itraconazole and ketoconazole, can also increase the levels of Lipitor in the blood.

It is important to talk to your doctor or pharmacist before taking any new medications with Lipitor to ensure that they are safe to take together.

According to Everyday Health [3], it is also important to avoid drinking large amounts of grapefruit juice while taking Lipitor, as it can increase the levels of the medication in the blood and increase the risk of side effects.

Sources:
[2] https://www.goodrx.com/atorvastatin/interactions
[3] https://www.everydayhealth.com/drugs/lipitor