Lipitor is a brand name for atorvastatin, which is a medication used to lower cholesterol levels in the blood. According to the NHS, the dosage and frequency of Lipitor intake depend on the patient's medical condition and response to treatment. Generally, the recommended starting dose for adults is 10mg to 20mg once a day, which can be increased up to 80mg daily if necessary. It is best to take Lipitor at the same time every day, with or without food, and with a full glass of water [2].

According to Drugs.com, taking Lipitor at night may be more effective in reducing cholesterol levels than taking it in the morning. This is because the body produces more cholesterol at night, so taking Lipitor before bed may help to target this peak production [3]. However, it is essential to follow the doctor's instructions regarding the timing of Lipitor intake.

Drugpatentwatch.com provides information on the patent status of Lipitor and its generic versions. However, it does not provide information on the frequency of Lipitor intake [1].

In conclusion, the frequency of Lipitor intake depends on the patient's medical condition and response to treatment. It is generally recommended to take Lipitor once a day, at the same time, with or without food, and with a full glass of water. Taking Lipitor at night may be more effective in reducing cholesterol levels, but it is essential to follow the doctor's instructions regarding the timing of Lipitor intake [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/does-lipitor-work-better-if-you-take-it-at-night-416127/