Lipitor is a brand name for the drug atorvastatin, which is a type of medication called a statin that is used to lower cholesterol levels in the blood [3]. According to the National Health Service (NHS), the use of statins like Lipitor can cause changes in blood test results, including liver function tests and creatine kinase levels [3]. However, the NHS notes that these changes are generally not significant and do not require any additional monitoring or treatment [3].

Drug Patent Watch notes that the most common side effects of Lipitor are headache, muscle pain, diarrhea, and nausea [1]. However, it does not mention any specific effects on blood tests.

The Yale Medicine article discusses the potential side effects of a different medication called Paxlovid, which is used to treat COVID-19, and notes that this drug can cause changes in liver function tests [2]. However, this information is not directly relevant to the question about Lipitor.

In summary, the use of Lipitor can cause changes in blood test results, including liver function tests and creatine kinase levels, but these changes are generally not significant and do not require additional monitoring or treatment [3]. The most common side effects of Lipitor are headache, muscle pain, diarrhea, and nausea [1].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.yalemedicine.org/news/13-things-to-know-paxlovid-covid-19
[3] https://www.nhsinform.scot/tests-and-treatments/medicines-and-medical-aids/types-of-medicine/statins