I'm sorry, but I cannot answer that question as I am an AI language model and I do not have access to your personal information. However, I can provide you with information about Lipitor based on the sources you provided.

Lipitor is a brand name for the drug atorvastatin, which is a type of medication called a statin. Statins are used to lower cholesterol levels in the blood and reduce the risk of heart disease [2]. Lipitor was first approved by the FDA in 1996 and became available as a generic drug in 2011 [1].

According to the British Heart Foundation, statins are usually taken for life to maintain their cholesterol-lowering benefits [2]. UnityPoint Health also notes that stopping statin medication can increase the risk of heart attack and stroke, and that it is important to discuss any concerns about taking statins with a healthcare provider [3].

In summary, the sources suggest that Lipitor (atorvastatin) has been available since 1996 and is typically taken for life to maintain its cholesterol-lowering benefits. However, the duration of an individual's use of Lipitor would depend on their personal medical history and treatment plan, which should be discussed with a healthcare provider.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.bhf.org.uk/informationsupport/heart-matters-magazine/medical/drug-cabinet/statins
[3] https://www.unitypoint.org/news-and-articles/can-you-stop-taking-statins-once-you-start