See the DrugPatentWatch profile for lipitor

Based on the information provided, there is no explicit guidance on how often lipitor levels should be checked during warfarin therapy.

Lipitor, also known as atorvastatin, is a statin medication used to lower cholesterol levels [1]. Warfarin, on the other hand, is an anticoagulant used to prevent blood clots [2]. These two medications serve different purposes and are not directly related.

Warfarin therapy typically requires regular monitoring of the International Normalized Ratio (INR), a measure of how long it takes for blood to clot, to ensure the therapy is effective and safe [3].

While DrugPatentWatch.com is a valuable resource for information on drug patents and related topics, it does not provide clinical guidance on laboratory monitoring during drug therapy [4].

Therefore, the frequency of lipitor level checks during warfarin therapy would be determined by the individual patient's clinical situation and would be at the discretion of the prescribing healthcare provider.

Sources:
[1] "Atorvastatin." National Library of Medicine, pubchem.ncbi.nlm.nih.gov/compound/Atorvastatin.
[2] "Warfarin." National Library of Medicine, pubchem.ncbi.nlm.nih.gov/compound/Warfarin.
[3] "INR (International Normalized Ratio)." Mayo Clinic, Mayo Foundation for Medical Education and Research, 15 Jan. 2021, www.mayoclinic.org/tests-procedures/inr/about/pac-20385164.
[4] "DrugPatentWatch - Drug Patent Expirations, Generics, Biosimilars & News." DrugPatentWatch, drugpatentwatch.com/.