Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood and reduce the risk of heart disease [1]. While the sources provided do not directly address how quickly Lipitor can lower heart rate, they do provide some insight into the medication's effects on the cardiovascular system.

According to a study published in the Journal of the American College of Cardiology, Lipitor was found to provide a potent heart benefit in patients with chronic stable angina [3]. The study found that Lipitor significantly reduced the incidence of major cardiovascular events, including heart attacks, strokes, and hospitalizations for angina, compared to a placebo. The study also found that Lipitor improved endothelial function, which is a measure of how well blood vessels are able to dilate and contract, in patients with chronic stable angina.

Another study published in the Journal of Cardiovascular Pharmacology found that Lipitor was able to reduce heart rate variability in patients with type 2 diabetes and dyslipidemia [2]. Heart rate variability is a measure of the variation in time between successive heartbeats, and reduced heart rate variability is associated with an increased risk of cardiovascular disease. The study found that Lipitor was able to improve heart rate variability in these patients, which may indicate a reduction in cardiovascular risk.

While these studies suggest that Lipitor may have beneficial effects on the cardiovascular system, they do not provide information on how quickly the medication can lower heart rate. It is important to note that the effects of Lipitor on heart rate may vary depending on the individual and their medical history. It is recommended that patients consult with their healthcare provider for personalized information on the effects of Lipitor on their cardiovascular health.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4251356/
[3] https://www.pfizer.com/news/press-release/press-release-detail/lipitor_provided_an_unexpectedly_potent_heart_benefit_in_patients_with_chronic_stable_angina_according_to_new_study