According to the sources provided, there is no specific time of day that is recommended for taking Lipitor (atorvastatin). However, there are some considerations to keep in mind.

The first source, Drug Patent Watch, does not provide specific information about the timing of Lipitor administration.

The second source, NHS (National Health Service), states that Lipitor can be taken at any time of the day, with or without food. It is important to take Lipitor consistently, preferably at the same time each day, to help remember to take it regularly.

The third source, Drugs.com, mentions that some studies have suggested that taking Lipitor at night may be more effective in lowering cholesterol levels. This is because the body naturally produces more cholesterol at night, and taking Lipitor in the evening may align with this natural rhythm. However, it is important to note that this recommendation is not universally agreed upon and may vary depending on individual circumstances.

Ultimately, it is best to consult with a healthcare professional or follow the specific instructions provided by the prescribing doctor or pharmacist. They can provide personalized advice based on your individual needs and medical history.

In summary, while there is no specific time of day recommended for taking Lipitor, it is generally advised to take it consistently at the same time each day. Taking it at night may be more effective in some cases, but it is important to consult with a healthcare professional for personalized guidance.

Sources:
[1] Drug Patent Watch. Lipitor. Retrieved from https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] NHS. Atorvastatin: How and when to take it. Retrieved from https://www.nhs.uk/medicines/atorvastatin/how-and-when-to-take-atorvastatin/
[3] Drugs.com. Does Lipitor work better if you take it at night? Retrieved from https://www.drugs.com/medical-answers/does-lipitor-work-better-if-you-take-it-at-night-416127/