How do doctors diagnose serotonin syndrome?

No available test can identify serotonin syndrome. To make a diagnosis, doctors consider your symptoms and all the medications you are taking. These include prescribed medicines, over-the-counter medicines, and any other supplements or drugs.

Doctors may need your input to diagnose serotonin syndrome. It’s important to be honest about the medications you take and your recent activities.

Some people have similar symptoms with a condition called neuroleptic malignant syndrome (NMS). NMS is a rare but serious reaction to antipsychotic medications such as haloperidol and fluphenazine. If you develop fever, muscle stiffness, or confusion after taking an antipsychotic medication, you should call your doctor right away.

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