Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. The medication belongs to a class of drugs called statins, which work by inhibiting the production of cholesterol in the liver [1].

According to the British Heart Foundation, some people may experience sleep disturbances while taking statins, including Lipitor. However, this side effect is not very common, and most people do not experience any sleep problems while taking statins [2].

A study published in the Journal of Clinical Sleep Medicine investigated the effects of atorvastatin on sleep quality in patients with obstructive sleep apnea (OSA). The study found that atorvastatin did not have a significant effect on sleep quality in patients with OSA [3].

While some people may experience sleep disturbances while taking Lipitor, this side effect is not very common. Additionally, a study found that Lipitor did not have a significant effect on sleep quality in patients with OSA. However, it is important to discuss any concerns about sleep disturbances with a healthcare provider [2][3].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.bhf.org.uk/informationsupport/heart-matters-magazine/medical/ask-the-experts/statins-and-sleep
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4624738/