Atorvastatin, commonly known by the brand name Lipitor, is typically taken once a day. The NHS recommends taking it at the same time each day, with or without food. However, Drugs.com suggests that taking atorvastatin with food may help increase its absorption and effectiveness. There is no specific requirement to take Lipitor after meals, but it can be taken with or without food according to personal preference or to reduce any potential stomach upset. It is important to follow the instructions provided by your healthcare provider or the information leaflet that comes with the medication to ensure optimal effectiveness.

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/