Double-Blind MethodPlacebosRandom AllocationPlacebo EffectSaline Solution, HypertonicCross-Over StudiesTreatment OutcomeSodium ChlorideDose-Response Relationship, DrugAdministration, OralTime FactorsDrug Therapy, CombinationDrug Administration ScheduleRandomized Controlled Trials as TopicClinical Trials as TopicSingle-Blind MethodBlood PressureInfusions, IntravenousPain Measurement