DexmedetomidinePremedicationMedetomidinePreanesthetic MedicationHypnotics and SedativesAdrenergic alpha-AgonistsAdrenergic alpha-2 Receptor AgonistsMidazolamAdjuvants, AnesthesiaClonidineConscious SedationMeperidineImidazolesAcepromazineFentanylDouble-Blind MethodAnalgesics, Non-NarcoticReceptors, Adrenergic, alpha-2PropofolAnti-Anxiety AgentsInfusions, IntravenousDiazepamAnesthetics, IntravenousAnesthesia, GeneralAnesthesia, IntravenousDrug HypersensitivityAnesthesia Recovery PeriodAnesthetics, InhalationPromethazineDose-Response Relationship, DrugKetamineSympatholyticsHemodynamicsAnalgesicsAmbulatory Surgical ProceduresLorazepamAnesthesia, InhalationAnesthesia, DentalIntubation, IntratrachealMethyl EthersThiopentalHeart RateShiveringAdrenergic alpha-AntagonistsDeep SedationCandyIdazoxanAirway ExtubationDiphenhydramineImidazoline ReceptorsAnalgesics, OpioidAdrenergic alpha-2 Receptor AntagonistsPaclitaxelButylscopolammonium BromideIsofluraneButorphanolAdministration, OralAnestheticsAnxiety, SeparationNeuroleptanalgesiaTreatment OutcomeAntineoplastic Agents, PhytogenicInjections, IntramuscularPain, PostoperativeConsciousness MonitorsBelladonna AlkaloidsDioxanesAnesthesiaPsychomotor AgitationBlood PressureDrug InteractionsAdministration, RectalAlfentanilAtropineRespirationPain MeasurementDrug Administration ScheduleAnesthetics, LocalNitrous OxideAnesthetics, CombinedHistamine H1 AntagonistsClemastineInjections, IntravenousAdjuvants, PharmaceuticAnesthesia, SpinalBenperidolMorphineInjections, SpinalProspective StudiesAnesthesia, LocalAdministration, BuccalAnesthetics, DissociativeOphthalmologic Surgical ProceduresIodine CompoundsOpiumLocus CoeruleusPainIsonipecotic AcidsSuccinylcholineAdministration, Sublingual