According to the sources provided, Lipitor (atorvastatin) is a medication used to lower cholesterol levels and reduce the risk of heart disease [1]. One of the potential side effects of Lipitor is sleep disturbances, including insomnia and abnormal dreams [2]. However, the sources do not specifically mention vivid dreams as a side effect of Lipitor.

A study published in the Journal of Clinical Psychopharmacology found that patients taking atorvastatin reported a higher incidence of sleep disturbances, including abnormal dreams, compared to patients taking a placebo [3]. However, the study did not specifically mention vivid dreams.

While the sources suggest that Lipitor may cause sleep disturbances and abnormal dreams, there is no clear evidence to suggest that it specifically causes vivid dreams. It is important to consult with a healthcare provider if you are experiencing any unusual side effects while taking Lipitor or any other medication.

Sources:
[1] Drug Patent Watch. Lipitor. https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] GoodRx. Medications that cause nightmares and disturbing dreams. https://www.goodrx.com/drugs/side-effects/medications-that-cause-nightmares-and-disturbing-dreams
[3] Golomb BA, Dimsdale JE, White HL, Ritchie JB, Criqui MH. Reduction in blood cholesterol with statins: Psychometric assessment and subjective experiences of a sample of healthy women. Journal of Clinical Psychopharmacology. 2001;21(4):355-364. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1444869/