Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the blood. According to the NHS [2], Lipitor should be taken once a day, preferably at night, with or without food. The drug can be taken with or without meals, but it is important to maintain a consistent schedule. The dosage of Lipitor depends on the patient's cholesterol levels and medical history, and it should be taken exactly as prescribed by a healthcare professional.

The website Drugs.com [3] also states that Lipitor can be taken with or without food, but it is recommended to take it at the same time each day. Taking Lipitor with food may help reduce the risk of stomach upset. However, certain foods can interfere with the absorption of the medication, so it is important to avoid grapefruit and grapefruit juice while taking Lipitor.

Drug Patent Watch [1] provides information on the patent status of Lipitor, but does not offer any information regarding the administration of the drug.

In summary, Lipitor can be taken with or without food, but it is important to take it at the same time each day and to avoid grapefruit and grapefruit juice. Patients should follow their healthcare provider's instructions on how to take Lipitor, and should not adjust their dosage or stop taking the medication without consulting their doctor.

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/