Based on the information available, it is not possible to definitively say that Lipitor is safer than other statins as each individual's response to medication can vary. Statins are a class of drugs often prescribed to lower cholesterol levels and reduce the risk of heart attack and stroke. Lipitor, also known as atorvastatin, is one such statin. Other commonly prescribed statins include Crestor (rosuvastatin), Zocor (simvastatin), and Pravachol (pravastatin) [1].

Studies have shown that all statins are generally well-tolerated and effective in reducing the risk of heart disease [2]. However, each statin has a unique chemical structure, which can affect how it is metabolized in the body and may result in different side effects [3]. For instance, some statins may be more likely to cause muscle pain or liver damage than others [4].

In terms of patent protection, Lipitor's patent expired in 2011 in the United States, which led to the introduction of generic atorvastatin [5]. According to DrugPatentWatch.com, the patent for Crestor is set to expire in 2023 [6]. The expiration of patents can lead to increased competition among drug manufacturers, potentially resulting in lower prices for patients [7].

In conclusion, while each statin may have a slightly different safety and efficacy profile, they are all generally safe and effective in reducing the risk of heart disease. Patients should consult with their healthcare provider to determine the best statin for their individual needs, considering factors such as potential side effects, cost, and other medical conditions [1][2][3][4].

Sources:
[1] Mayo Clinic. (2021). Statins: Are they right for you? Retrieved from <https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statins/art-20045746>
[2] Arnett, D. K., Blumenthal, R. S., Albert, M. A., Buroker, A. B., Goldberger, Z. D., Hahn, E. J., Himmelfarb, C. D., Khera, A., Lloyd-Jones, D., McEvoy, J. W., Michos, E. D., Miedema, M. D., Muñoz, D., Smith, S. C. J., Virani, S. S., Williams, K. A. S., Yeboah, J., & Ziaeian, B. (2019). 2019 ACC/AHA guideline on the primary prevention of cardiovascular disease. Circulation, 140(11), e563-e595.
[3] National Lipid Association. (2014). NLA Releases First-Ever Consensus Panel Report on Statin Safety and Efficacy. Retrieved from <https://www.lipidjournal.com/article/S1933-2874(14)00332-6/fulltext>
[4] FDA. (2014). FDA updates label for high cholesterol drugs known as statins. Retrieved from <https://www.fda.gov/drugs/postmarket-drug-safety-information-patients-and-providers/fda-updates-label-high-cholesterol-drugs-known-statins>
[5] Drugs.com. (2021). Lipitor. Retrieved from <https://www.drugs.com/lipitor.html>
[6] DrugPatentWatch.com. (2021). Rosuvastatin (Crestor). Retrieved from <https://www.drugpatentwatch.com/drugs/rosuvastatin>
[7] Harvard Health Publishing. (2019). Generic drugs: Are they as good as brand-name drugs? Retrieved from <https://www.health.harvard.edu/diseases-and-conditions/generic-drugs-are-they-as-good-as-brand-name-drugs>