Lipitor is a medication used to lower cholesterol levels in the blood. It is a prescription drug that contains atorvastatin calcium as its active ingredient. According to the drug label provided by the FDA [3], the most common side effects of Lipitor are muscle and joint pain, diarrhea, and nausea. However, the severity and frequency of side effects can vary depending on age.

A study published in the National Library of Medicine [2] analyzed the safety and efficacy of Lipitor in patients of different ages. The study found that Lipitor was well-tolerated in patients aged 10-17 years, with similar side effects to those observed in adult patients. In elderly patients aged 65 years and older, the incidence of side effects was higher than in younger patients. The most common side effects reported in this age group were muscle pain and weakness.

The drug patent watch [1] provides information on the side effects of Lipitor by age group. According to the data, the most common side effects in patients aged 18-64 years are headache, muscle pain, and diarrhea. In patients aged 65 years and older, muscle pain, weakness, and fatigue are more common.

In summary, the side effects of Lipitor can vary depending on age. While the medication is generally well-tolerated, elderly patients may experience more side effects than younger patients. Muscle pain and weakness are the most common side effects reported in this age group. Patients should consult with their healthcare provider to discuss the risks and benefits of Lipitor before starting treatment.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6915405/
[3] https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/020702s073lbl.pdf