Relating to or affecting the neurotransmitter serotonin.
Serotoninergic things are related to the chemical in the brain that makes you feel happy.
Examples:
The serotoninergic medicine helps people feel better.
She studies the serotoninergic system in the brain.
The serotoninergic effect is very strong.
The serotoninergic food made everyone happy!
The serotoninergic music made everyone dance and laugh.
The serotoninergic drug changed his life for the better.