Dopamine AgonistsIndolesNeurochemistryReceptors, Dopamine D3Receptors, Dopamine D2Restless Legs SyndromeBenzothiazolesReceptors, Dopamine D4DomperidoneHelplessness, LearnedOxazinesLevodopaDealkylationDopamine AgentsParkinson DiseaseDyskinesia, Drug-InducedReceptors, DopamineDelayed-Action PreparationsBiotransformationPlacebosDrug InteractionsDouble-Blind MethodRats, Wistar