Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the blood. According to [2], Lipitor does not directly cause weight gain. However, it is possible for some people to experience weight gain as a side effect of taking Lipitor. This weight gain is usually minimal and may be due to other factors such as changes in diet or lifestyle. In rare cases, Lipitor may cause an increase in blood sugar levels, which can lead to weight gain over time.

It is important to note that the benefits of taking Lipitor to reduce the risk of heart disease and stroke generally outweigh the potential side effects. Patients should talk to their doctor if they experience any unusual weight gain or other side effects while taking Lipitor.

Sources:
[2] https://www.medicalnewstoday.com/articles/lipitor
[3] https://www.healthline.com/health/drugs/lipitor-side-effects