Based on the information available, there is no explicit mention that daytime fatigue is a common side effect of Lipitor (atorvastatin). Lipitor is a medication used to treat high cholesterol levels, and the most common side effects typically include muscle and stomach problems [1]. However, it's important to note that everyone's reaction to medication can vary, and some people may experience less common side effects not listed in the general information.

If you are experiencing daytime fatigue or any other unusual symptoms while taking Lipitor, it is recommended to consult with a healthcare professional. They can provide personalized advice based on your medical history and current health status.

Sources:
[1] DrugPatentWatch.com. (n.d.). Lipitor (Atorvastatin) Patent Expiration & Generics. Retrieved from https://www.drugpatentwatch.com/patent/lipitor-atorvastatin/