Lipitor is a medication that is commonly used to lower cholesterol levels and reduce the risk of heart disease. However, like any medication, it may have side effects. According to the sources provided, some comparable side effects to Lipitor include:

1. Muscle pain and weakness: A study published in the Journal of Clinical Lipidology [3] found that muscle pain and weakness are the most common side effects of statins, the class of drugs to which Lipitor belongs. This can be due to the depletion of CoQ10, a nutrient that is essential for muscle function.

2. Liver damage: Statins can cause liver damage, although this is rare. According to a study published in the Journal of the American College of Cardiology [2], less than 1% of patients taking statins experience liver damage.

3. Gastrointestinal problems: Some patients may experience gastrointestinal problems such as nausea, diarrhea, or constipation while taking Lipitor. However, these side effects are usually mild and go away on their own.

4. Cognitive impairment: There have been reports of cognitive impairment, such as memory loss or confusion, in patients taking statins. However, a review published in the Journal of the American College of Cardiology [2] found that this is rare and that the benefits of statins outweigh the risks.

It is important to note that not all patients will experience these side effects, and some may experience no side effects at all. If you are taking Lipitor and experience any side effects, it is important to speak with your doctor.

Sources:
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4859299/
[3] https://pubmed.ncbi.nlm.nih.gov/12860216/
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR