Serotonin syndrome

- breakdown due to excess serotonin in system

Characterized by:

    Agitation or restlessness
    Confusion
    Rapid heart rate and high blood pressure
    Dilated pupils
    Loss of muscle coordination or twitching muscles
    Muscle rigidity
    Heavy sweating
    Diarrhea
    Headache
    Shivering
    Goose bumps

This is partially driven by excesses in brain but also in the intestines where seretonin is also produced

https://www.mayoclinic.org/diseases-conditions/serotonin-syndrome/symptoms-causes/syc-20354758