Both Lipitor and Crestor are statin drugs that are used to lower cholesterol levels in the body. Statins work by inhibiting the production of cholesterol in the liver, thereby reducing the amount of cholesterol in the bloodstream [2].

According to the drug patent watch website, Lipitor's active ingredient is atorvastatin, while Crestor's active ingredient is rosuvastatin [1]. While both drugs are effective at lowering cholesterol levels, Crestor has been found to be more potent than Lipitor. In a study published in the Journal of Clinical Lipidology, researchers found that patients who took Crestor had a greater reduction in LDL (bad) cholesterol levels compared to those who took Lipitor [3].

However, it is important to note that both drugs can have side effects. According to the Mayo Clinic, some common side effects of statins include muscle pain and damage, liver damage, and digestive problems [2]. The severity of these side effects can vary from person to person, and it is important to talk to a doctor before starting any new medication.

In summary, while both Lipitor and Crestor are effective at lowering cholesterol levels, Crestor has been found to be more potent. However, both drugs can have side effects, and it is important to talk to a doctor before starting any new medication.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4823995/