Lipitor (atorvastatin) is a medication that is used to treat high cholesterol levels. It is important to be aware of potential drug interactions with Lipitor to avoid any adverse effects. According to the sources provided, there are several common Lipitor drug interactions to consider.

One potential interaction is with drugs that inhibit the CYP3A4 enzyme, which is responsible for metabolizing Lipitor. Examples of such drugs include erythromycin, clarithromycin, and ketoconazole. Taking these drugs with Lipitor can increase the risk of muscle pain and weakness, which is a potential side effect of Lipitor [1].

Another interaction to consider is with grapefruit juice. Grapefruit juice can also inhibit the CYP3A4 enzyme, which can lead to higher levels of Lipitor in the bloodstream. This can increase the risk of side effects such as muscle pain and weakness [2].

Additionally, some drugs can increase the risk of side effects when taken with Lipitor. For example, taking Lipitor with drugs that increase the risk of bleeding, such as warfarin, can increase the risk of bleeding [3].

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 can help you determine the best course of action to manage any potential drug interactions.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/atorvastatin/interactions
[3] https://www.verywellhealth.com/statin-side-effects-and-drug-interactions-698202