Lipitor is a brand name for the drug atorvastatin, which is a type of medication called a statin that is used to lower cholesterol levels in the blood [1]. Grapefruit and grapefruit juice contain a compound that can interfere with the way the body metabolizes certain medications, including statins like Lipitor. This compound, called furanocoumarin, can increase the level of the medication in the bloodstream, which can lead to serious side effects [2]. Therefore, it is recommended to avoid consuming grapefruit or grapefruit juice while taking Lipitor [3].

The timing of consuming grapefruit after taking Lipitor is not specified in the sources provided. However, it is important to note that the interaction between grapefruit and Lipitor can occur even if the grapefruit is consumed hours before or after taking the medication [2]. Therefore, it is best to avoid consuming grapefruit altogether while taking Lipitor to prevent any potential interactions and side effects.

In conclusion, Lipitor is a medication used to lower cholesterol levels, and grapefruit or grapefruit juice should be avoided while taking it due to the potential for serious side effects. The timing of consuming grapefruit after taking Lipitor is not specified, but it is recommended to avoid grapefruit altogether while taking the medication to prevent any potential interactions.

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