BaclofenGABA-B Receptor AgonistsGABA AgonistsMuscle Relaxants, CentralReceptors, GABA-BMuscle SpasticityInfusion Pumps, ImplantableGABA-B Receptor AntagonistsInjections, SpinalSodium OxybateMuscimolGABA AntagonistsPhosphinic Acidsgamma-Aminobutyric AcidBicucullineReceptors, GABA-AOrganophosphorus CompoundsGABA AgentsNipecotic AcidsInfusions, SpinalRats, Sprague-DawleyReceptors, GABAAmino Acids, NeutralSpasmDouble-Blind MethodTime FactorsGABA-A Receptor AgonistsRadiation DosageLethal Dose 50Rats, WistarUrinary Bladder CalculiDrug Interactions