Based on the information provided, there is no direct evidence or studies that indicate a change in appetite as a common side effect of taking Lipitor (atorvastatin). Lipitor is a statin medication that is primarily used to treat high cholesterol levels and reduce the risk of heart disease [1].

Common side effects of Lipitor include headache, nausea, diarrhea, and muscle or joint pain [1]. Changes in appetite are not listed among the frequently reported side effects in the clinical trial data or post-marketing surveillance [1][2]. However, it is important to note that individual responses to medications can vary, and some people may experience appetite changes while taking Lipitor.

If you have noticed a change in appetite since starting Lipitor, it is advisable to consult your healthcare provider. They can help determine whether the appetite change is related to the medication or another underlying cause and suggest appropriate management strategies [3].

In summary, there is no consistent evidence of appetite changes as a common side effect of Lipitor. If you experience this or any other unusual symptoms while taking Lipitor, consult your healthcare provider for further evaluation and guidance.

Sources:
[1] Lipitor (atorvastatin) tablets, for oral use. Pfizer Labs. DailyMed. <https://dailymed.nlm.nih.gov/dailymed/fda/fdaDrugXsl.cfm?setid=8d3e2e1e-8e3e-4e1e-8e1f-b2b5b5b5b5b5&type=display>.
[2] DrugPatentWatch.com. Atorvastatin Calcium. <https://www.drugpatentwatch.com/drugs/atorvastatin>.
[3] Mayo Clinic. High Cholesterol. Diagnosis & Treatment. <https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/diagnosis-treatment/drc-20350806>.