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. According to the Mayo Clinic [2], statins like Lipitor are effective at lowering cholesterol levels by blocking the production of cholesterol in the liver. This leads to a decrease in LDL (bad) cholesterol levels and an increase in HDL (good) cholesterol levels.

However, it is important to note that statins like Lipitor can also have side effects. The Mayo Clinic [2] notes that some of the most common side effects of statins include muscle and joint pain, nausea, diarrhea, and constipation. Additionally, statins can sometimes cause liver damage or increase blood sugar levels.

While statins like Lipitor can help to lower cholesterol levels, it is possible that they could affect cholesterol levels during tests. According to the British Heart Foundation [3], statins can cause cholesterol levels to fluctuate during the first few weeks of treatment. Additionally, the Drug Patent Watch [1] notes that Lipitor can interfere with certain laboratory tests that are used to measure cholesterol levels. Therefore, it is important to talk to a doctor about any medications being taken and any potential effects on cholesterol levels during testing.

In conclusion, Lipitor is a statin medication that can be effective at lowering cholesterol levels, but it can also have side effects. While it is possible that Lipitor could affect cholesterol levels during tests, it is important to talk to a doctor about any concerns or questions regarding medication and cholesterol testing.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] https://www.bhf.org.uk/informationsupport/heart-matters-magazine/medical/drug-cabinet/statins