Lipitor is a medication used to lower cholesterol levels in the body and is a type of drug called a statin [3]. According to Drug Patent Watch, the patent for Lipitor expired in 2011, and since then, generic versions of the drug have been available [1].

As for how long it takes for Lipitor to take effect, it varies from person to person. SingleCare explains that it may take several weeks to see the full effects of Lipitor on cholesterol levels [2]. It is essential to continue taking the medication as prescribed by a healthcare provider, even if there is no immediate improvement in cholesterol levels.

It is worth noting that like all medications, Lipitor may cause side effects, which can range from mild to severe. Common side effects include muscle pain, weakness, and diarrhea, while rare but serious side effects include liver problems and muscle damage [2].

In conclusion, Lipitor is a statin medication used to lower cholesterol levels, and it may take several weeks to see the full effects on cholesterol levels. However, it is essential to continue taking the medication as prescribed, even if there is no immediate improvement in cholesterol levels. As with all medications, Lipitor may cause side effects, and it is essential to speak with a healthcare provider about any concerns.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.singlecare.com/blog/lipitor-side-effects/
[3] https://www.bhf.org.uk/informationsupport/heart-matters-magazine/medical/drug-cabinet/statins