Lipitor is a medication used to reduce cholesterol levels in the blood, specifically low-density lipoprotein (LDL) cholesterol. However, it is unclear how long it takes for Lipitor to reduce protein levels in the blood.

According to Drug Patent Watch [1], Lipitor (atorvastatin) is a prescription medication that was first approved by the FDA in 1996. It works by inhibiting an enzyme in the liver that is responsible for producing cholesterol. As a result, Lipitor can lower LDL cholesterol levels by up to 60%.

A study published in the Journal of Clinical Lipidology [3] found that treatment with atorvastatin (Lipitor) for 6 months resulted in significant reductions in LDL cholesterol levels. However, the study did not measure the effects of Lipitor on protein levels.

Another study published in the Journal of Clinical Pharmacology [2] investigated the effects of atorvastatin on protein levels in the blood. The study found that treatment with atorvastatin for 12 weeks resulted in significant reductions in several proteins, including C-reactive protein (CRP), which is a marker of inflammation. However, the study did not measure the effects of Lipitor on all protein levels.

Overall, it is unclear how long it takes for Lipitor to reduce protein levels in the blood. While some studies have shown that Lipitor can reduce certain protein levels after a few weeks or months of treatment, more research is needed to determine the full effects of Lipitor on protein levels.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://pubmed.ncbi.nlm.nih.gov/15635109/
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5489069/