The neurotransmitter 5-hydroxytryptamine (5-HT) has an array of pharmacological and physiological roles within the central nervous system. It has the potential to develop a number of useful medicines. The selective 5-hydroxytryptamine (5-HT, serotonin) reuptake inhibitors (SSRIs) show potency in major depression. 5-HT receptors divide into seven major classes (5-HT1-7)....