Lipitor is a brand name for the drug atorvastatin, which is a medication used to lower cholesterol levels in the blood. According to the National Health Service (NHS) [2], atorvastatin can be taken with or without food, but it is recommended to take it at the same time every day. The NHS also advises that atorvastatin should be taken in the evening because cholesterol is produced more by the liver at night.

The British Heart Foundation (BHF) [3] also recommends taking atorvastatin in the evening, as it can be more effective at reducing cholesterol levels when taken at this time. The BHF advises that atorvastatin can be taken with or without food, but it is important to follow the instructions on the label or as directed by a healthcare professional.

Drug Patent Watch [1] provides information on the patent status of Lipitor, but does not provide any information on how to take the medication.

In conclusion, both the NHS and the BHF recommend taking atorvastatin in the evening, with or without food, but it is important to take it at the same time every day and follow the instructions on the label or as directed by a healthcare professional.

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.bhf.org.uk/informationsupport/heart-matters-magazine/medical/drug-cabinet/statins