5-HT2a Receptors increase GABAergic transmission
A large body of preclinical evidence suggests that stimulation of 5-HT2a receptors increases GABAergic neurotransmission & inhibits Pyramidal neurons (Shen1998; Scruggs2003; Abi-Saab1999; Zhang2010; Ashby1990; Marek1996; elMansari1997; Bergqvist1999)