Lipitor, a medication used to treat high cholesterol, can interact with grapefruit juice. This interaction can lead to increased levels of Lipitor in the bloodstream, which may increase the risk of side effects [1].

Common side effects of Lipitor include muscle pain, diarrhea, and joint pain [1]. However, increased levels of Lipitor in the bloodstream due to grapefruit juice consumption can lead to more severe side effects such as liver damage, kidney damage, and muscle damage (rhabdomyolysis) [1][2].

It is important to note that the interaction between Lipitor and grapefruit juice is not fully understood, and it is not clear what amount of grapefruit juice is safe to consume while taking Lipitor [1]. Therefore, it is recommended to avoid consuming grapefruit juice altogether while taking Lipitor [1].

If you are taking Lipitor and have consumed grapefruit juice, it is important to monitor for any signs of side effects and contact your healthcare provider if you have any concerns [1].

In summary, consuming grapefruit juice while taking Lipitor can increase the levels of Lipitor in the bloodstream and potentially lead to more severe side effects. It is recommended to avoid consuming grapefruit juice while taking Lipitor [1][2].

Sources:

1. <https://www.drugpatentwatch.com/drugs/atorvastatin>
2. <https://www.fda.gov/drugs/postmarket-drug-safety-information-patients-and-providers/important-safety-information-atorvastatin-calcium-tablets-lipitor>