Serotonin Syndrome
A potentially serious condition resulting from excess serotonin activity, usually caused by combining medications or substances that increase serotonin, involving mental, autonomic, and neuromuscular symptoms.
Overview
Serotonin syndrome is a potentially serious condition resulting from excess serotonergic activity in the nervous system, typically caused by combining two or more serotonin-affecting medications or substances, ranging from mild to life-threatening in severity.
Signs and Symptoms
Symptoms can include agitation, confusion, rapid heart rate, high blood pressure, dilated pupils, muscle twitching, tremor, sweating, and, in severe cases, high fever and seizures. Experiencing one or more of these symptoms does not necessarily mean that a person has this condition. Diagnosis requires an appropriate clinical evaluation.
Causes and Risk Factors
Serotonin syndrome is caused by combinations of medications or substances that increase serotonin activity, such as certain antidepressants combined with other serotonergic drugs.
Diagnosis
A diagnosis should be made by a qualified healthcare professional following a comprehensive clinical assessment. Clinicians may use established diagnostic frameworks such as DSM-5-TR and/or ICD-11 as part of a comprehensive assessment.
Treatment
Treatment depends on the individual’s symptoms, clinical history, severity, age, co-occurring conditions, and other relevant factors.
Psychotherapy
This is a medical condition managed acutely in a medical setting rather than through psychotherapy.
Medication
Treatment involves stopping the causative substances and supportive medical care; severe cases require emergency treatment. Medication decisions should be made with a qualified prescribing healthcare professional. Do not start, stop, or change a prescribed medication based solely on information on this page.
Living With Serotonin Syndrome
If symptoms are severe, including high fever, seizures, or significant confusion, seek immediate assistance through appropriate local emergency services.
When to Seek Professional Help
Professional evaluation may be appropriate if symptoms persist, worsen, cause significant distress, or interfere with work, school, or relationships.
Emergency Situations
If a person may be in immediate danger, is experiencing a medical or psychiatric emergency, or may harm themselves or another person, seek immediate assistance through appropriate local emergency services.
Outlook
Most cases resolve within 24 to 72 hours of stopping the causative substances with appropriate supportive care; severe cases require prompt emergency treatment.
Related Conditions
Medical Information Disclaimer
Ratel Health provides general educational information and does not provide medical diagnosis, treatment, or individualized medical advice. Information on this page is not a substitute for evaluation or care from a qualified healthcare professional. Do not use this information to diagnose yourself or another person, or to start, stop, or change treatment or medication without consulting an appropriately qualified healthcare professional.
References
- American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR).
- National Institute of Mental Health.
- U.S. Food and Drug Administration.
- World Health Organization. International Classification of Diseases, 11th Revision.