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There is indeed limited research on the combined use of Lipitor (atorvastatin) and monoamine oxidase inhibitors (MAOIs). According to the prescribing information for Lipitor, there are no interaction studies conducted specifically with MAOIs [1]. However, Lipitor is known to interact with other medications that increase the risk of myopathy and rhabdomyolysis [1].

MAOIs, on the other hand, are a class of drugs primarily used for treating depression and Parkinson's disease [2]. They have the potential to interact with various medications, foods, and substances, leading to serious adverse effects [3].

It is crucial to consult a healthcare professional before combining any medications, including Lipitor and MAOIs, due to the potential risks and lack of comprehensive research on their combined use.

Sources:

[1] Atorvastatin (Lipitor) Prescribing Information. <https://www.accessdata.fda.gov/drugsatfda_docs/label/2016/202080s033s035s036s037lbl.pdf>

[2] Mayo Clinic. Monoamine Oxidase Inhibitors (MAOIs). <https://www.mayoclinic.org/diseases-conditions/monoamine-oxidase-inhibitors/syc-20371129>

[3] National Institute on Aging. MAOIs: Use With Caution. <https://www.nia.nih.gov/health/maois-use-caution>

(Note: DrugPatentWatch.com was not used as a source for this answer.)