HTR1A and Atypical behavior: Though it seems that D3 agonists may be preferentially related to gambling and similar behavioral disorders, recent literature data have suggested a correlation also between this ADR and aripiprazole, which is an atypical antipsychotic, that acts as a partial agonist at D2 receptors and 5-HT1a and 5-HT2 serotonin receptors (Khanna et al. 2014).