Tags: Drug.
SB-699551 is a drug which was the first compound developed to act as a selective antagonist for the serotonin receptor 5-HT5A with selectivity of around 100x over other serotonin receptor subtypes. The function of the 5-HT5A receptor remains poorly defined but SB-699551 was found to modulate serotonin release from neurons suggesting it acts as a presynaptic inhibitory autoreceptor similar to the 5-HT1B and 5-HT1D receptors.