Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the body [1]. According to the National Health Service (NHS), atorvastatin can be taken at any time of the day, with or without food [2]. However, it is recommended to take the medication at the same time each day to help remember when to take it [2].

The website Drugs.com also suggests that atorvastatin can be taken with or without food [3]. However, it is important to note that consuming grapefruit or grapefruit juice while taking atorvastatin can increase the risk of side effects [3]. Therefore, it is recommended to avoid consuming grapefruit or grapefruit juice while taking this medication [3].

In summary, atorvastatin (Lipitor) can be taken at any time of the day, with or without food. It is recommended to take the medication at the same time each day to help remember when to take it. However, it is important to avoid consuming grapefruit or grapefruit juice while taking atorvastatin as it can increase the risk of side effects. [2][3]

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.nhs.uk/medicines/atorvastatin/how-and-when-to-take-atorvastatin/
[3] https://www.drugs.com/medical-answers/eat-food-taking-atorvastatin-3565628/