Lipitor is a medication used to lower cholesterol levels in the body. According to the sources provided, there is no specific timeframe for liver checks when taking Lipitor. However, regular liver function tests are recommended for individuals taking statins, including Lipitor, to monitor any potential liver damage [2][3].

The liver function tests are usually performed before starting the medication, and then periodically thereafter, depending on the patient's individual risk factors and medical history [3]. The frequency of these tests may vary from person to person, and the doctor may adjust the frequency of these tests depending on the patient's liver function test results and overall health [3].

It is important to note that while statins, including Lipitor, are generally safe and well-tolerated, they can cause liver damage in rare cases [2]. Symptoms of liver damage may include yellowing of the skin or eyes, dark urine, and abdominal pain [3]. If any of these symptoms occur, it is important to contact a healthcare provider immediately.

In conclusion, while there is no specific timeframe for liver checks when taking Lipitor, regular liver function tests are recommended for individuals taking statins to monitor any potential liver damage. The frequency of these tests may vary depending on the patient's individual risk factors and medical history. It is important to contact a healthcare provider immediately if any symptoms of liver damage occur.

Sources:
[2] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[3] https://www.nhs.uk/conditions/statins/considerations/
[4] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7526761/