Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. According to the sources provided, the time it takes for Lipitor to work varies depending on the individual and their specific condition.

DrugPatentWatch [1] notes that Lipitor's patent expired in 2011, which means that generic versions of the drug are available. However, it is important to note that different generic versions of Lipitor may have different absorption rates and bioavailability, which can affect how quickly the medication works.

DrugWatch [2] explains that it can take anywhere from two weeks to several months for Lipitor to lower cholesterol levels in the blood. The medication works by blocking an enzyme that the liver needs to produce cholesterol, so it may take some time for the body to adjust and for cholesterol levels to decrease.

Healthline [3] also notes that Lipitor's effectiveness can depend on various factors, including the severity of the individual's condition, their age, and other health conditions they may have. It is important to take Lipitor as directed by a healthcare provider and to follow a healthy diet and exercise plan to maximize the medication's effectiveness.

In conclusion, the time it takes for Lipitor to work varies depending on the individual and their specific condition. It can take anywhere from two weeks to several months for the medication to lower cholesterol levels in the blood. It is important to take Lipitor as directed by a healthcare provider and to follow a healthy lifestyle to maximize its effectiveness.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.drugwatch.com/lipitor/
[3] https://www.healthline.com/health/drugs/lipitor