Lipitor, also known as Atorvastatin, is a medication used to lower cholesterol levels in the body. According to the sources provided, there is some evidence to suggest that taking Lipitor at night may be more effective than taking it in the morning.

One reason for this is that the body naturally produces more cholesterol at night, so taking Lipitor before bed may help to better target this increase in cholesterol production [2]. Additionally, a study published in the Journal of Clinical Lipidology found that patients who took Lipitor at night had lower levels of LDL (bad) cholesterol compared to those who took it in the morning [2].

However, it is important to note that the timing of when you take Lipitor may not make a significant difference for everyone. The NHS website states that Lipitor can be taken at any time of day, with or without food, and that it is more important to take it consistently at the same time each day [3].

Ultimately, the decision of whether to take Lipitor at night or in the morning should be made in consultation with a healthcare provider, who can take into account individual factors such as medical history and other medications being taken [2].

Sources:
[2] https://www.drugs.com/medical-answers/does-lipitor-work-better-if-you-take-it-at-night-416127/
[3] https://www.nhs.uk/medicines/atorvastatin/how-and-when-to-take-atorvastatin/
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR