Lipitor is a medication used to lower cholesterol levels in the blood [1]. Grapefruit and grapefruit juice contain compounds that can interfere with the metabolism of certain drugs, including Lipitor [2]. These compounds inhibit an enzyme in the liver that is responsible for breaking down Lipitor, which can cause the drug to build up in the body to potentially dangerous levels [3]. This can increase the risk of side effects, such as muscle pain, liver damage, and kidney failure [2]. Therefore, it is recommended that people taking Lipitor avoid consuming grapefruit or grapefruit juice [2][3]. If you are taking Lipitor and are concerned about possible interactions with other foods or medications, it is important to speak with your doctor or pharmacist [3].

Sources:
[1] DrugPatentWatch. (n.d.). Lipitor. Retrieved from https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] GoodRx. (2021, February 16). Why Can't I Have Grapefruit With My Statin? Retrieved from https://www.goodrx.com/classes/statins/why-cant-i-have-grapefruit-with-my-statin
[3] Ro. (n.d.). Lipitor and Grapefruit: Why You Shouldn't Mix Them. Retrieved from https://ro.co/health-guide/lipitor-and-grapefruit/