Lipitor is a prescription medication that is used to lower cholesterol levels in the body [1]. Statins, such as Lipitor, work by blocking an enzyme in the liver that produces cholesterol [2]. According to GoodRx [2], grapefruit juice can interact with statins and increase the risk of side effects. This is because grapefruit juice contains a compound that can inhibit the same enzyme that statins block, leading to higher levels of the medication in the bloodstream. The Harvard Health Blog [3] recommends that people who take statins avoid drinking grapefruit juice altogether.

Therefore, it is recommended that individuals taking Lipitor should avoid drinking grapefruit juice entirely. There is no specific waiting time mentioned in the sources provided, but it is best to avoid consuming grapefruit juice while taking Lipitor to prevent any potential interactions [2][3]. If you have any concerns or questions about taking Lipitor, you should speak with your healthcare provider.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.goodrx.com/classes/statins/why-cant-i-have-grapefruit-with-my-statin
[3] https://www.health.harvard.edu/heart-health/grapefruit-juice-and-statins