ClonidinePremedicationPreanesthetic MedicationAdrenergic alpha-AgonistsMidazolamAdjuvants, AnesthesiaHypnotics and SedativesMeperidineAcepromazineDiazepamSympatholyticsAdrenergic alpha-2 Receptor AgonistsAnti-Anxiety AgentsDrug HypersensitivityDouble-Blind MethodPromethazineFentanylAnalgesicsAnesthesia, GeneralMedetomidineYohimbineAnesthesia, InhalationAmbulatory Surgical ProceduresAnesthetics, IntravenousAnesthesia, IntravenousCandyMethyl EthersReceptors, Adrenergic, alpha-2PropofolAnxiety, SeparationAnesthesia, DentalDiphenhydramineAtropineHeart RateButylscopolammonium BromideButorphanolNeuroleptanalgesiaInfusions, IntravenousPaclitaxelAnesthesia Recovery PeriodAdrenergic alpha-AntagonistsKetamineBelladonna AlkaloidsImidazoline ReceptorsAnesthetics, InhalationIntubation, IntratrachealAdministration, OralAntineoplastic Agents, PhytogenicAnesthesiaReceptors, Adrenergic, alphaPain, PostoperativeAdministration, RectalBlood PressureOpiumMorphineConscious SedationOphthalmologic Surgical ProceduresGuanfacineClemastineAnesthesia, LocalBenperidolAnesthetics, DissociativeInjections, SpinalHistamine H1 AntagonistsInjections, IntramuscularDose-Response Relationship, DrugLorazepamThiopentalAnalgesics, OpioidAdministration, BuccalHemodynamicsNitrous OxideAnesthesia, SpinalAnesthetics, LocalIodine CompoundsSuccinylcholineDrug InteractionsInjections, IntravenousIsonipecotic AcidsXylazinePainIdazoxanAdministration, SublingualProspective StudiesMiosisIntraoperative PeriodAdrenergic alpha-2 Receptor AntagonistsGastroscopyEpinephrineOxymetazolineLidocainePain MeasurementAnestheticsAnxietyTaxoidsAnesthetics, CombinedDental AnxietyNorepinephrinePrazosinDrug Administration Schedule