Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the blood. According to the NHS [3], it is generally recommended to take atorvastatin once a day, at the same time each day, with or without food. However, Stat News [2] suggests that taking atorvastatin with food can help improve its absorption and effectiveness. Therefore, it is safe to eat a snack after taking Lipitor.

It is important to note that there are some foods that can interact with atorvastatin and potentially reduce its effectiveness. For example, grapefruit and grapefruit juice should be avoided while taking atorvastatin because they can increase the levels of the drug in the blood and increase the risk of side effects [2].

In terms of side effects, atorvastatin can cause a range of symptoms, including headaches, muscle pain, and digestive issues [3]. If you experience any concerning side effects, it is important to speak with your doctor.

Sources:
[2] https://www.statnews.com/2016/11/03/medications-food-drug-interactions/
[3] https://www.nhs.uk/medicines/atorvastatin/side-effects-of-atorvastatin/
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR