Based on the information provided, there is no mention of energy levels changing after starting Lipitor (atorvastatin) in the given sources. Lipitor is a medication used to treat high cholesterol levels, and the available information focuses on its effects on cholesterol and cardiovascular health.

Lipitor belongs to a class of drugs called statins, which work by blocking the enzyme HMG-CoA reductase, thereby reducing the production of cholesterol in the body [1]. This, in turn, helps lower the risk of heart attack and stroke [3].

Although some anecdotal reports may exist of energy level changes after starting Lipitor, there is no scientific evidence or consensus on this topic. If you experience changes in energy levels or any other unexpected symptoms after starting a new medication, it is essential to consult your healthcare provider [2].

Sources:

[1] DrugPatentWatch. (n.d.). Lipitor. Retrieved from <https://www.drugpatentwatch.com/p/tradename/LIPITOR>

[2] National Center for Biotechnology Information. (2016). Statins and Muscle Pain: Is There a Connection? Retrieved from <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5005588/>

[3] Yale Medicine. (n.d.). Should You Take a Statin for High Cholesterol? Retrieved from <https://www.yalemedicine.org/news/should-you-take-a-statin-for-high-cholesterol>