Lipitor is a statin medication used to lower cholesterol levels and reduce the risk of heart disease and stroke. While it is generally well-tolerated, there have been concerns about whether it can worsen diabetes symptoms.

According to the Mayo Clinic [2], some studies have suggested that statins, including Lipitor, may increase the risk of developing diabetes or worsen blood sugar control in people who already have diabetes. However, the risk is generally small, and the benefits of taking statins usually outweigh the potential risks.

One study published in the Journal of Diabetes Investigation [3] found that Lipitor did not have a significant effect on blood sugar control in people with type 2 diabetes. However, the study did note that people with diabetes who take Lipitor may need to have their blood sugar levels monitored more closely.

Another study published in the Journal of the American College of Cardiology [3] found that Lipitor was associated with a slightly increased risk of developing diabetes, but the risk was still considered low.

Overall, while there is some evidence to suggest that Lipitor may increase the risk of developing diabetes or worsen blood sugar control in people who already have diabetes, the risk is generally small. People with diabetes who take Lipitor should have their blood sugar levels monitored closely, and they should discuss any concerns with their healthcare provider.

Sources:
[2] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] https://www.healthline.com/health/diabetes/lipitor
[4] https://www.drugpatentwatch.com/p/tradename/LIPITOR