Lipitor is a prescription medication used to lower cholesterol levels and reduce the risk of heart disease. According to Drug Patent Watch [1], Lipitor is typically taken once a day, with or without food. The recommended starting dose for most adults is 10 mg per day, which can be increased up to 80 mg per day if necessary. The dosage may vary depending on the individual's medical condition and response to treatment. It is important to take Lipitor exactly as prescribed by the doctor and to not stop taking it without consulting a healthcare provider.

The NHS [2] recommends taking atorvastatin, the generic name for Lipitor, at the same time each day to help remember to take it. It can be taken at any time of the day, but it is best to take it in the evening. This is because the body produces more cholesterol at night, and taking atorvastatin in the evening can help reduce this production. It is important to not drink grapefruit juice while taking Lipitor, as it can increase the risk of side effects.

The British Heart Foundation [3] also recommends taking atorvastatin in the evening, as this is when the body produces more cholesterol. They advise taking it with a glass of water, and to not crush or chew the tablets. It is important to continue taking Lipitor even if there are no symptoms, as it is a long-term treatment for high cholesterol.

In conclusion, Lipitor is typically taken once a day, with or without food. The recommended starting dose is 10 mg per day, which can be increased up to 80 mg per day if necessary. It is best to take Lipitor in the evening, with a glass of water, and to not drink grapefruit juice while taking it. It is important to take Lipitor exactly as prescribed by the doctor and to not stop taking it without consulting a healthcare provider.

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