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Serotonin syndrome is rare, but it can become a medical emergency if not recognized promptly.

Serotonin syndrome usually occurs after overdoses, dose increases, or using multiple serotonergic substances.

For most people taking antidepressants as prescribed, serotonin syndrome remains an uncommon complication.

"I've just started an antidepressant and read about serotonin syndrome. How worried should I be?"

It's a reasonable concern, especially given how much conflicting information about antidepressants circulates online.

Serotonin syndrome, also known as serotonin toxicity, is a rare but potentially life-threatening condition. It is usually caused by combining medications that increase serotonin activity in the central nervous system or, less commonly, by a substantial increase in the dose of a serotonergic medication.

Serotonin is a neurotransmitter naturally produced by the body that plays an essential role in several physiological functions, including mood regulation. For that reason, medications that affect serotonin signaling are widely prescribed to treat a range of psychiatric conditions, either alone or in combination with other drugs.

Given how commonly these medications are prescribed, questions like the one that opens this post are understandable. The challenge is separating real risks from common misconceptions.

Causes of serotonin syndrome

Since this is a health problem induced by medication use, the cause is directly related to how these drugs affect serotonin activity in the body.

Selective serotonin reuptake inhibitors (SSRIs), such as sertraline, escitalopram, and fluoxetine, are perhaps the group most commonly associated with serotonin syndrome, whether because of dose increases, drug interactions, accidental misuse, or intentional overdose.

Although SSRIs are the medications most frequently involved simply because they are so widely prescribed, the........

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