BupivacaineAnesthetics, LocalLiposomesAnesthesia, SpinalAnalgesia, EpiduralAmidesAnalgesia, ObstetricalAnesthesia, EpiduralAnesthesia, ObstetricalNerve BlockLidocaineDrug CarriersPain, PostoperativeAnesthesia, CaudalAmphotericin BEtidocaineAnesthesia, LocalSufentanilDouble-Blind MethodFentanylAnesthetics, CombinedInjections, SpinalAdjuvants, AnesthesiaMepivacaineDoxorubicinCesarean SectionPolyethylene GlycolsCarticaineAnalgesics, OpioidPain MeasurementAnalgesiaAntifungal AgentsStereoisomerismDose-Response Relationship, DrugDrug Delivery SystemsSensationSubarachnoid SpaceDrug CombinationsAnalgesia, Patient-ControlledAntibiotics, AntineoplasticMorphineNystatinBrachial PlexusChemistry, PharmaceuticalLabor, ObstetricProcaineInjections, EpiduralAmbulatory Surgical ProceduresPregnancyPrilocaineTime FactorsDeoxycholic AcidInjections, IntravenousEpinephrineTissue DistributionSpecific GravitySciatic NerveThoracotomyDrug CompoundingHernia, Inguinal