Double-Blind MethodIndomethacinPlacebo EffectCyclooxygenase InhibitorsAnti-Inflammatory Agents, Non-SteroidalProstaglandinsDinoprostoneProstaglandins EProstaglandin-Endoperoxide SynthasesDose-Response Relationship, DrugCross-Over StudiesProstaglandin AntagonistsTreatment OutcomeIbuprofenDuctus Arteriosus, PatentCyclooxygenase 14,5-Dihydro-1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-amineStomach UlcerArachidonic AcidsGastric MucosaAspirin6-Ketoprostaglandin F1 alphaMasoprocolArachidonic AcidMeclofenamic AcidTime FactorsAdministration, OralProstaglandins FCyclooxygenase 2 InhibitorsCyclooxygenase 2EpoprostenolVasodilationLipoxygenase InhibitorsBradykinin16,16-Dimethylprostaglandin E2Nitric OxideDrug InteractionsBiological FactorsRats, WistarThromboxane B2Anti-Inflammatory AgentsSulfonamidesNitrobenzenesNG-Nitroarginine Methyl Ester5,8,11,14-Eicosatetraynoic AcidNitroarginineBlood PressureDrug Therapy, CombinationPyrazolesClinical Trials as TopicAcetylcholineThromboxane A2RabbitsVasoconstrictionGuinea PigsMuscle RelaxationEndothelium, VascularPiroxicamVasodilator AgentsDrug Administration ScheduleDinoprostKetoprofenMuscle ContractionHistamineProstaglandins E, SyntheticDuctus ArteriosusDiclofenacRandomized Controlled Trials as TopicRats, Inbred StrainsSRS-ASulfonesRats, Sprague-DawleyEdemaEnzyme InhibitorsThromboxanesSuppositoriesVasoconstrictor AgentsNaproxenCimetidineNitric Oxide SynthaseMuscle, SmoothSingle-Blind MethodButanonesRegional Blood FlowRandom AllocationPhenylbutazoneInjections, IntravenousQuinacrineDipyrone