Based on the information available, the benefits of Lipitor, a medication used to treat high cholesterol, typically become apparent within four to six weeks of starting the medication [1]. However, it's important to note that the full benefits of Lipitor may not be realized until after several months of consistent use [1].

Individual responses to Lipitor can vary, and it's crucial to continue taking the medication as directed by a healthcare professional, even if the full benefits are not immediately apparent. Regular check-ups and discussions with a healthcare provider can help monitor progress and adjust treatment plans as needed.

It's also worth noting that Lipitor, like all medications, can have side effects. Common side effects of Lipitor include muscle pain, digestive issues, and cold-like symptoms [1]. If these side effects persist or become severe, it's essential to consult a healthcare provider.

In terms of patent information, Lipitor (atorvastatin) was first approved by the FDA in 1996 and its patent expired in 2011 [2]. After the patent expiration, generic versions of Lipitor became available, which may affect cost and accessibility [2].

In summary, Lipitor's benefits typically become apparent within four to six weeks, but it may take several months to experience the full benefits. Regular check-ups and communication with a healthcare provider are crucial to monitor progress and adjust treatment plans as needed.

Sources:
[1] "Lipitor." Mayo Clinic, Mayo Foundation for Medical Education and Research, 11 Nov. 2021, <https://www.mayoclinic.org/drugs-supplements/lipitor-oral-route/description/drg-20063481>.
[2] "Lipitor (Atorvastatin) Drug Patent Expiration.” DrugPatentWatch, <https://www.drugpatentwatch.com/drugs/lipitor>.