Lipitor is a medication used to lower cholesterol levels in the blood. It is part of a class of drugs called statins. Grapefruit juice is known to interact with many medications, including Lipitor, by blocking an enzyme in the liver that is responsible for breaking down the drug [2]. This can lead to higher levels of Lipitor in the blood, increasing the risk of side effects such as muscle pain and liver damage [3].

According to Drug Patent Watch, Lipitor is manufactured by Pfizer and is no longer protected by patents, meaning that generic versions of the drug are available [1].

Harvard Health Publishing states that the interaction between grapefruit juice and Lipitor can last for up to 24 hours after consuming the juice, and advises patients taking Lipitor to avoid grapefruit and grapefruit juice altogether [2]. Verywell Health also recommends avoiding grapefruit juice while taking Lipitor, as well as other statins such as Zocor [3].

In conclusion, grapefruit juice can interact with Lipitor by increasing the drug's levels in the blood, potentially leading to side effects. Patients taking Lipitor should avoid consuming grapefruit or grapefruit juice.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.health.harvard.edu/heart-health/grapefruit-juice-and-statins
[3] https://www.verywellhealth.com/can-i-take-lipitor-or-zocor-with-grapefruit-juice-1124045