Lipitor, a medication used to lower cholesterol levels, is not typically known to directly impede weight loss. Its primary function is to reduce levels of "bad" cholesterol in the blood. However, weight gain can be a side effect of Lipitor or other statin medications, though it is not very common. It is important to note that individual responses to medications can vary, and some people may experience weight-related side effects while taking Lipitor. If you are concerned about weight gain or any other side effects while taking Lipitor, it is recommended to consult with a healthcare provider to discuss potential alternatives or strategies for successful weight loss.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.healthline.com/health/drugs/lipitor
[3] https://www.medicalnewstoday.com/articles/lipitor