Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the blood. Grapefruit and grapefruit juice can interact with certain medications, including some statins like Lipitor. According to a study published in the Journal of Clinical Lipidology, grapefruit juice can increase the absorption of atorvastatin, leading to higher blood levels of the drug [2]. This can increase the risk of side effects, such as muscle pain and liver damage.

The Drug Patent Watch website provides information on the patent status of drugs, including Lipitor. However, it does not provide information on adjusting Lipitor dosage based on grapefruit intake [1].

Harvard Health Publishing explains that it is best to avoid grapefruit and grapefruit juice while taking Lipitor, as well as other statins. If a person cannot avoid grapefruit, they should speak with their doctor about adjusting their medication dosage or switching to a different medication [3].

In summary, grapefruit can interact with Lipitor, leading to higher blood levels of the drug and an increased risk of side effects. It is best to avoid grapefruit while taking Lipitor, but if that is not possible, a person should speak with their doctor about adjusting their medication dosage or switching to a different medication.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3589309/
[3] https://www.health.harvard.edu/heart-health/grapefruit-juice-and-statins