Linezolid/MAOIs Interactions

This information is generalized and not intended as specific medical advice. Consult your healthcare professional before taking or discontinuing any drug or commencing any course of treatment.

Medical warning:

Very Serious. These medicines may interact and cause very harmful effects and are usually not taken together. Contact your healthcare professional (e.g. doctor or pharmacist) for more information.

How the interaction occurs:

Both of these medicines inhibit monoamine oxidase.

What might happen:

You may experience extremely high blood pressure, which may be fatal. Symptoms may include: frequent/severe headache, fast/slow/irregular/pounding heartbeat, chest pain, neck stiffness/soreness, severe nausea/vomiting, sweating/clammy skin (sometimes with fever), widened pupils, sudden sensitivity to light (photophobia).High serotonin levels may cause changes in body temperature, blood pressure, and behavior or mood, leading to a medical condition called Serotonin Syndrome. Serotonin Syndrome may be life threatening.

What you should do about this interaction:

Let your healthcare professionals (e.g. doctor or pharmacist) know right away that you are taking these medicines together. Let your doctor know right away if you experience frequent/severe headache, fast/slow/irregular/pounding heartbeat, chest pain, neck stiffness/soreness, severe nausea/vomiting, sweating/clammy skin (sometimes with fever), widened pupils, sudden sensitivity to light (photophobia).If you experience muscle twitching, tremors, shivering and stiffness, fever, heavy sweating, heart palpitations, restlessness, confusion, agitation, trouble with coordination, or severe diarrhea contact your doctor right away,Your healthcare professionals may already be aware of this interaction and may be monitoring you for it. Do not start, stop, or change the dosage of any medicine before checking with them first.

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  • 2.Zyvox (linezolid) UK summary of product characteristics. Pharmacia Limited July 10, 2008.
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  • 7.Surmaitis RM, Nappe TM, Cook MD. Serotonin syndrome associated with therapeutic metaxalone in a patient with cirrhosis. Am J Emerg Med 2016 Feb;34(2):346.e5-6.
  • 8.Skelaxin (metaxalone) US prescribing information. Pfizer Laboratories Div Pfizer Inc. January, 2024.
  • 9.USFood and Drug Administration. FDA Drug Safety Communication: Updated information about the drug interaction between methylene blue (methylthioninium chloride) and serotonergic psychiatric medications. available at: http://www.fda.gov/Drugs/DrugSafety/ucm276119.htm October 21, 2011.
  • 10.USFood and Drug Administration. FDA Drug Safety Communication: Updated information about the drug interaction between linezolid (Zyvox) and serotonergic psychiatric medications. available at: http://www.fda.gov/Drugs/DrugSafety/ucm276251.htm October 21, 2011.

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CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.