TetrodotoxinInjections, SubcutaneousInjectionsInjections, IntramuscularInjections, IntravenousRats, Sprague-DawleySaxitoxinSodium Channel BlockersDose-Response Relationship, DrugInjections, IntraperitonealRats, WistarTime FactorsSodium ChannelsInjections, IntradermalVeratridineDisease Models, AnimalAction PotentialsInjections, IntralesionalGuinea PigsElectric StimulationMembrane PotentialsSodiumInjections, Intra-ArticularRats, Inbred StrainsAtropineNeuronsLidocaineMice, Inbred BALB CAnimals, NewbornInjections, IntraventricularMice, Inbred C57BLTetraodontiformesAnesthetics, LocalRabbitsMuscle ContractionRecombinant ProteinsInjections, SpinalCalciumMuscle, SmoothNadroparinSkinElectrophysiologyVeratrineFishes, PoisonousProtoveratrinesPotassium1,2-DimethylhydrazineInjections, EpiduralNeedlesRandom AllocationOrgan SizeSerotoninNitrosomethylurethaneSynaptic TransmissionInsulin, Long-ActingDrug Administration RoutesInjections, Intra-ArterialGuanethidineIon ChannelsNeoplasm TransplantationLiverTransdermal PatchInsulin, Short-ActingIntravitreal InjectionsTetraethylammonium CompoundsNaloxoneBody WeightDrug Administration ScheduleColonDogsHexamethonium CompoundsCells, CulturedPainMice, Inbred ICRTurpentineHexamethoniumTreatment OutcomeInjections, JetIleumSciatic NervePoisonsElectric ConductivityDelayed-Action PreparationsMice, Inbred StrainsInjections, IntraocularImmunohistochemistryAcetylcholineMice, NudeDouble-Blind MethodToxins, BiologicalMicroinjectionsPatch-Clamp TechniquesRats, Inbred F344RNA, MessengerRats, HairlessAxonsProcaineMusclesImmunizationCapsaicin