Based on the available information, there is no specific mention of energy changes related to the use of Lipitor. Lipitor, also known as atorvastatin, is a statin drug that works by blocking a substance your body needs to make cholesterol [1]. It is primarily used to treat high cholesterol and prevent heart disease [2].

The drug's mechanism of action does not directly involve energy production or consumption in the body. Instead, it inhibits the HMG-CoA reductase enzyme, which plays a crucial role in the production of cholesterol in the body [1][2]. By reducing cholesterol levels, Lipitor helps prevent plaque buildup in the arteries, thereby reducing the risk of heart disease and stroke [3].

It is important to note that, like any medication, Lipitor can have side effects. Some common side effects include headache, muscle and joint pain, and digestive symptoms [2]. However, the sources provided do not mention energy changes, such as increased or decreased energy levels, as a side effect of Lipitor.

In summary, while Lipitor can have various side effects, there is no specific information indicating energy changes as a result of taking this medication. If you have concerns about energy changes or other side effects related to Lipitor, it is always best to consult with a healthcare professional.

Sources:
[1] <https://www.drugpatentwatch.com/p/tradename/LIPITOR>
[2] <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5005588/>
[3] <https://www.hopkinsmedicine.org/health/wellness-and-prevention/how-statin-drugs-protect-the-heart>