Lipitor is a commonly prescribed medication for lowering cholesterol levels. According to Drug Patent Watch [1], liver function tests are usually recommended before starting Lipitor and then repeated periodically during treatment. The frequency of these tests may vary depending on individual patient factors, such as age, liver function, and other medications being taken.

A recent article published in the National Center for Biotechnology Information [2] suggests that liver function tests should be performed regularly in patients taking statins, including Lipitor. The study found that statins can cause liver damage in some patients, although this is rare. The researchers recommend that liver function tests should be performed at baseline and then every six months for the first year of treatment, and then annually thereafter.

Harvard Health Publishing [3] also recommends that liver function tests should be performed before starting statin therapy and then periodically thereafter. The frequency of these tests may vary depending on individual patient factors, such as age, liver function, and other medications being taken. The article notes that while statins can cause liver damage in some patients, this is rare and usually mild.

In conclusion, liver function tests are recommended before starting Lipitor and then periodically during treatment. The frequency of these tests may vary depending on individual patient factors, such as age, liver function, and other medications being taken. Regular liver function tests are important to monitor for any potential liver damage that may occur with statin therapy.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7526761/
[3] https://www.health.harvard.edu/diseases-and-conditions/ask-the-doctor-statins-and-liver-tests