Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the blood. It is essential to know the interactions of Lipitor with other drugs as it may cause serious side effects. According to Drug Patent Watch [1], there are 227 drugs that interact with Lipitor, and among them, 33 have major drug interactions, 182 have moderate drug interactions, and 12 have minor drug interactions.

Drugs.com [2] and GoodRx [3] also provide a list of drugs that interact with Lipitor. The major drug interactions include amiodarone, colchicine, cyclosporine, daptomycin, erythromycin, gemfibrozil, HIV medications, lomitapide, nefazodone, rifampin, and telaprevir. These drugs may increase the risk of muscle damage, kidney failure, and other serious side effects.

Moderate drug interactions of Lipitor include drugs like amlodipine, aspirin, digoxin, fluconazole, and verapamil. These drugs may increase the risk of side effects, and the dose of Lipitor may need to be adjusted.

Minor drug interactions of Lipitor include drugs like caffeine, grapefruit, and St. John's Wort. These drugs may affect the way Lipitor works, but the interaction is not significant enough to cause serious side effects.

It is crucial to inform the healthcare provider about all the medications, supplements, and herbal products you are taking before starting Lipitor. The healthcare provider can adjust the dose or prescribe an alternative medication to avoid the risk of interactions.

In conclusion, Lipitor has several drug interactions, including major, moderate, and minor interactions. Patients should inform their healthcare provider about all the medications they are taking to avoid serious side effects.

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