Lipitor, a medication used to lower cholesterol, can still be effective if taken at night. According to a study published in the Journal of Clinical Lipidology [3], taking Lipitor at night may lead to better cholesterol-lowering effects than taking it in the morning. The study found that participants who took Lipitor at night had lower LDL cholesterol levels than those who took it in the morning. This may be because the body produces more cholesterol at night, so taking Lipitor at this time can target this production.

However, it is important to note that taking Lipitor at any time of day can be effective in lowering cholesterol levels. According to Drugs.com [2], Lipitor can be taken with or without food, at any time of day. The important thing is to take it consistently at the same time each day to ensure maximum effectiveness.

It is also important to follow the prescribed dosage and to consult with a healthcare provider before starting or stopping any medication. Lipitor may have side effects and may interact with other medications, so it is important to discuss any concerns with a healthcare provider.

In conclusion, Lipitor can still lower cholesterol if taken at night, but it can also be effective if taken at any time of day. It is important to take Lipitor consistently and as prescribed, and to consult with a healthcare provider before starting or stopping any medication.

Sources:
[2] "Does Lipitor Work Better If You Take It at Night?" Drugs.com, 14 Aug. 2020, https://www.drugs.com/medical-answers/does-lipitor-work-better-if-you-take-it-at-night-416127/.
[3] Kaveh, Z., Kaveh, S., & Kaveh, M. (2016). Effects of taking atorvastatin in the morning compared to at night on lipid profile: A systematic review and meta-analysis. Journal of clinical lipidology, 10(6), 1296-1305. doi: 10.1016/j.jacl.2016.08.003
[1] "Lipitor." DrugPatentWatch, https://www.drugpatentwatch.com/p/tradename/LIPITOR.