See the DrugPatentWatch profile for lipitor

Based on the information available, it is generally not possible to purchase Lipitor, a cholesterol-lowering medication, without a doctor's approval. Lipitor, also known as Atorvastatin, is a prescription drug [1]. Prescription drugs require approval from a healthcare professional due to potential risks and interactions with other medications or health conditions [1].

Moreover, Lipitor is still under patent protection in several countries, including the United States, which means that generic versions of the drug are not yet available [2]. This further limits the ability to obtain the drug without a prescription, as generic versions are typically less regulated and more accessible without a prescription [3].

Therefore, it is important to consult with a healthcare professional before considering the use of Lipitor or any other prescription medication. This will ensure safe and effective use of the drug, as well as prevent potential harm or adverse effects.

In summary, based on the available information, it is not possible to buy Lipitor without a doctor's approval due to its prescription status and patent protection.

Sources:
[1] Mayo Clinic. (2021). Atorvastatin (Oral Route). Retrieved from <https://www.mayoclinic.org/drugs-supplements/atorvastatin-oral-route/description/drg-20063095>.
[2] DrugPatentWatch. (2022). Atorvastatin Calcium. Retrieved from <https://www.drugpatentwatch.com/drugs/atorvastatin>.
[3] Food and Drug Administration. (2019). Generic Drugs: Questions and Answers. Retrieved from <https://www.fda.gov/drugs/generic-drugs/generic-drugs-questions-and-answers>.