Lipitor is a medication used to lower cholesterol levels in the blood. According to the sources provided, it is recommended to take Lipitor once a day, with or without food [1][2][3]. However, taking it with low-fat snacks may help improve its absorption and reduce the risk of gastrointestinal side effects [2]. It is important to follow the dosing instructions provided by the healthcare provider and not to exceed the recommended dose. It is also important to inform the healthcare provider about any other medications or supplements being taken, as they may interact with Lipitor. As with any medication, if any adverse effects are experienced, the healthcare provider should be notified immediately.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.healthline.com/health/drugs/lipitor
[3] https://www.aafp.org/pubs/afp/issues/2000/0601/p3371.html