Drowsiness is not explicitly listed as a common early side effect of Lipitor (atorvastatin) by the manufacturer or the FDA [1][2]. However, some users may experience fatigue or dizziness [1]. It is crucial to consult with a healthcare professional if you have concerns about any potential side effects.

Lipitor is a statin medication used to lower cholesterol levels and reduce the risk of heart disease [1]. Common side effects may include headache, nausea, diarrhea, and muscle or joint pain [1]. Serious side effects are rare but can include liver damage, muscle damage, and increased blood sugar levels [1].

It is important to note that everyone's reaction to medication is different, and side effects can vary based on individual factors such as age, weight, and other health conditions [1].

Sources:

1. [Lipitor (atorvastatin calcium) tablets, for oral use. Pfizer Labs. Darien, CT. Rev. Nov 2021.] <https://www.accessdata.fda.gov/drugsatfda_docs/label/2021/020958s065lbl.pdf>
2. [Lipitor. Drugs.com. Rev. Jan 2022.] <https://www.drugs.com/lipitor.html>
3. [Atorvastatin. DrugPatentWatch.com. Rev. Jan 2022.] <https://www.drugpatentwatch.com/drugs/atorvastatin>