Ropinirole hydrochloride

Ropinirole a selective dopamine D2 receptors agonist with Ki of 29 nM. (In Vitro) :Ropinirole hydrochloride has affinity for D3 receptors of 10-20 fold higher than the D2 and D4 receptors. Ropinirole hydrochloride is weakly active at alpha 2-adrenoceptors and 5-HT2 receptors but inactive at 5-HT1, benzodiazepine and gamma-aminobutyric acid receptors or alpha 1 and beta-adrenoceptors. (In Vivo) :Ropinirole (0.1-10 mg/kg; i.p.) decreases intracranial self-stimulation (ICSS) thresholds and induces anxiolytic- and antidepressive-like effects without affecting motor activity or spatial memory.