Key result
Methylene blue administration for postbypass vasoplegic shock in patients taking serotonergic medications can lead to potentially lethal serotonin excess syndrome.
Why the study?
Does methylene blue administration for vasoplegia increase the risk of serotonin syndrome in cardiopulmonary bypass patients on serotonergic medications?
Does methylene blue administration for vasoplegia increase the risk of serotonin syndrome in cardiopulmonary bypass patients on serotonergic medications?
Providers must weigh the use of methylene blue for post-cardiopulmonary bypass vasoplegia against the risk of potentially lethal serotonin syndrome in patients on serotonergic antidepressants.
Answers are grounded in this paper and cite their sources.
Anesthesia providers should recognize serotonin syndrome risk with methylene blue plus serotonergic agents in cardiac surgery; case reports leave open need for prospective data.
Methylene blue, a drug used to treat vasoplegia and methemoglobinemia, also inhibits monoamine oxidase-A. When given in combination with serotonergic medications, methylene blue can lead to serotonin excess syndrome. Given the widespread use of serotonergic medication to treat depression, anesthesia providers should be aware of this potentially lethal interaction. Patients undergoing cardiopulmonary bypass for cardiac surgery are a specific population at risk for postbypass vasoplegic shock. The use of methylene blue to treat vasoplegia in this group of patients should be weighed in light of their current medications and potential drug interactions.
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Hanna et al. (2014) conducted a review in Postbypass vasoplegic shock. Methylene blue combined with serotonergic medications was evaluated on Serotonin excess syndrome. Methylene blue administration for postbypass vasoplegic shock in patients taking serotonergic medications can lead to potentially lethal serotonin excess syndrome.
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