what does serotonin do
Inhibitory Neurotransmitters. SEROTONIN is an inhibitory neurotransmitter â which means that it does not stimulate the brain. Adequate amounts of serotonin are necessary for a stable mood and to balance any excessive excitatory (stimulating) neurotransmitter firing in the brain.nhibitory Neurotransmitters. SEROTONIN is an inhibitory neurotransmitter â which means that it does not stimulate the brain. Adequate amounts of serotonin are necessary for a stable mood and to balance any excessive excitatory (stimulating) neurotransmitter firing in the brain.