Lipitor, a medication commonly prescribed to manage high cholesterol, contains the active ingredient atorvastatin. It works by blocking a substance your body needs to make cholesterol, thereby reducing the amount of cholesterol that may build up on the walls of the arteries [1].

Regarding the question of Lipitor's impact on energy improvement or decline, the available information suggests that some people may experience fatigue or weakness as a side effect of taking Lipitor or other statins [2][3]. However, it's important to note that not everyone who takes Lipitor will experience these side effects.

According to a study published in the Journal of Clinical Lipidology, muscle-related symptoms such as fatigue and weakness are common in patients taking statins, but the relationship between these symptoms and statin therapy is complex and multifactorial [2].

On the other hand, some studies suggest that statins like Lipitor may have neuroprotective effects and could potentially improve cognitive function in some patients [1].

In summary, while some people may experience fatigue or weakness as a side effect of taking Lipitor, not everyone will experience these symptoms. It's important to discuss any concerns about side effects with a healthcare provider.

Sources:
[1] <https://www.drugpatentwatch.com/p/tradename/LIPITOR>
[2] <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5830056/>
[3] <https://www.healthline.com/health/high-cholesterol/can-statins-make-you-tired>