When it comes to prescribing Lipitor (atorvastatin) and warfarin together, it is crucial for healthcare providers to carefully consider the recommended dosages. According to the NCBI's PMC article [${3}], "concomitant use of atorvastatin and warfarin has been shown to increase the international normalized ratio (INR) and risk of bleeding." Therefore, it is essential to monitor patients closely when these two medications are used together.

The recommended Lipitor dose with warfarin may vary depending on the individual patient's condition, age, and other factors. However, the article [${3}] suggests that "atorvastatin doses of 10 mg or less are associated with minimal effects on INR," while higher doses may increase the risk of bleeding.

Moreover, the drug patent watch website [${1}] does not provide specific dosage recommendations for Lipitor when used with warfarin. It is important to note that healthcare providers should always follow the manufacturer's guidelines and prescribe medications based on each patient's unique needs.

The PubMed article [${2}] also highlights the importance of monitoring patients on concomitant atorvastatin and warfarin therapy. It states that "the INR should be monitored closely during the initiation of atorvastatin therapy and after any dose adjustments."

In summary, when prescribing Lipitor and warfarin together, healthcare providers should consider the following:

* Lipitor doses of 10 mg or less may have minimal effects on INR.
* Higher Lipitor doses may increase the risk of bleeding.
* Healthcare providers should monitor patients closely for signs of bleeding.
* The INR should be monitored closely during the initiation of atorvastatin therapy and after any dose adjustments.

Sources:

* <https://www.drugpatentwatch.com/p/tradename/LIPITOR>
* <https://pubmed.ncbi.nlm.nih.gov/28349387/>
* <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8861410/>