Lipitor is a medication used to lower cholesterol levels in the blood. According to the sources provided, taking Lipitor on an empty stomach does not appear to have any significant side effects. However, taking the medication with food may reduce the risk of side effects.

The first source, Drug Patent Watch [1], provides information on the active ingredient in Lipitor, atorvastatin. It does not mention any specific side effects associated with taking the medication on an empty stomach.

The second source, a news article from Lawson Research [2], suggests that taking cholesterol medication with food may reduce the risk of side effects. The article cites a study that found that taking statins with food reduced the risk of muscle pain and liver damage, which are potential side effects of these medications. While this study does not specifically mention Lipitor, it is a statin medication like the ones studied.

The third source, Mayo Clinic [3], provides information on the proper use of Lipitor. It recommends taking the medication at the same time each day, with or without food. However, it notes that taking Lipitor with certain foods, such as grapefruit juice, can increase the risk of side effects.

In conclusion, there is no evidence to suggest that taking Lipitor on an empty stomach has any significant side effects. However, taking the medication with food may reduce the risk of certain side effects, such as muscle pain and liver damage. It is important to follow the proper use guidelines provided by healthcare professionals and to avoid taking Lipitor with certain foods that may increase the risk of side effects.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.lawsonresearch.ca/news/taking-cholesterol-medication-food-could-reduce-risk-side-effects
[3] https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/proper-use/drg-20067003