Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the body. According to Drug Patent Watch [1], the patent for Lipitor expired in 2011, which means that generic versions of the drug are now available.

The article published in the National Center for Biotechnology Information [2] states that Lipitor is typically prescribed for long-term use to manage high cholesterol levels. The length of treatment can vary depending on the individual's condition and response to the medication. It is important to continue taking the medication as prescribed by a healthcare provider, even if there are no immediate symptoms or changes in cholesterol levels.

While Lipitor is generally considered safe and effective, it can cause side effects in some individuals. According to Medical News Today [3], common side effects of Lipitor include muscle pain, weakness, and tenderness, as well as nausea, diarrhea, and constipation. Rare but serious side effects can also occur, such as liver problems and an increased risk of developing type 2 diabetes. If any side effects occur, it is important to contact a healthcare provider.

In conclusion, Lipitor is typically prescribed for long-term use to manage high cholesterol levels, and the length of treatment can vary depending on the individual's condition and response to the medication. While Lipitor is generally considered safe and effective, it can cause side effects in some individuals. It is important to continue taking the medication as prescribed and to contact a healthcare provider if any side effects occur.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3371460/
[3] https://www.medicalnewstoday.com/articles/drugs-lipitor-side-effects