Serotonin syndrome means that too much neurotransmitter serotonin is in the brain or elsewhere in the body. The reason is that you have consumed too high doses of MDMA or mixed MDMA with other substances, such as antidepressants (specifically monoamine oxidase inhibitors, MAO inhibitors), or other substances that affect serotonin levels. A serotonin syndrome can be life-threatening.
Chills / tremors / tremors
Impaired motor movement
What do you do?
Call an ambulance immediately and inform them that the affected person has consumed these substances.