Lipitor is a brand name for atorvastatin, a medication used to treat high cholesterol levels and reduce the risk of heart attack or stroke. According to the Mayo Clinic [2], the most common side effects of atorvastatin are headache, joint pain, diarrhea, and changes in some blood tests. However, there is no mention of appetite changes in this source.

Drug Patent Watch [1] also does not provide information on how Lipitor affects appetite. However, Medical News Today [3] states that one of the less common side effects of atorvastatin is loss of appetite. This side effect is not as common as other side effects such as headache or muscle pain, but it is still a possibility.

In conclusion, while there is no mention of appetite changes in the Mayo Clinic or Drug Patent Watch sources, Medical News Today suggests that loss of appetite can be a less common side effect of atorvastatin. It is important to note that individual experiences with medication can vary, and anyone experiencing unusual side effects should consult their healthcare provider.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/side-effects/drg-20067003
[3] https://www.medicalnewstoday.com/articles/atorvastatin-oral-tablet