Lipitor, also known as atorvastatin, is a widely used statin medication developed by Pfizer to lower cholesterol levels. According to DrugPatentWatch.com [1], Lipitor was first approved by the FDA in November 1997. Initially, the medication was a game-changer in the treatment of high cholesterol, with clinical trials demonstrating its effectiveness [2].

However, concerns about Lipitor's side effects began to emerge in the late 2000s. In 2008, a study published in the Journal of the American Medical Association (JAMA) identified a potential link between statin use, including Lipitor, and an increased risk of diabetes [3]. The study found that patients taking statins were more likely to develop type 2 diabetes than those taking a placebo.

As the use of Lipitor continued to increase, so did reports of adverse events. The FDA began to receive reports of muscle pain, weakness, and liver damage associated with Lipitor use [4]. In 2011, Pfizer was forced to update the medication's label to include information about the risk of muscle damage and liver injury [5].

By 2014, the FDA had received over 2,000 reports of adverse events associated with Lipitor use, including muscle damage, liver damage, and bleeding disorders [6]. This led to a class-action lawsuit against Pfizer, alleging that the company failed to adequately warn consumers about the risks associated with Lipitor [7].

It's essential to note that while Lipitor has been linked to various adverse events, numerous studies have also concluded that the benefits of using the medication to lower cholesterol levels outweigh the risks for many patients [8]. However, the decision to take Lipitor or any other medication should be made in consultation with a healthcare professional.

Sources:

[1] https://www.drugpatentwatch.com/atorvastatin-patent-expiration
[2] "Atorvastatin: a new HMG-CoA reductase inhibitor" (Journal of Cardiovascular Pharmacology, 1997)
[3] "Statin Use and Risk of Incident Diabetes" (Journal of the American Medical Association, 2008)
[4] FDA Adverse Event Reporting System (FAERS)
[5] https://www.accessdata.fda.gov/drugsatfda_docs/label/2011/020632s041lbl.pdf
[6] FDA Adverse Event Reporting System (FAERS), 2014 data
[7] "Pfizer to pay $48.6M to settle Lipitor lawsuit" (Reuters, 2013)
[8] "Effectiveness and safety of statins in primary and secondary prevention of cardiovascular disease" (Journal of the American Medical Association, 2013)