AspirinAnalgesicsAnalgesics, OpioidAnalgesics, Non-NarcoticAnti-Inflammatory Agents, Non-SteroidalAnalgesiaPainPain MeasurementPlatelet Aggregation InhibitorsMorphinePain, PostoperativeAcetaminophenTramadolPhenacetinCyclooxygenase InhibitorsTiclopidineDextropropoxypheneDouble-Blind MethodThromboxane B2SalicylatesDrug ToleranceIbuprofenCodeineDose-Response Relationship, DrugPlatelet AggregationPain ThresholdDrug Therapy, CombinationPlatelet Function TestsMeperidineFentanylPentazocineKidney Papillary NecrosisPain ManagementReceptors, Opioid, muOxycodoneAnesthetics, LocalDipyroneHyperalgesiaInjections, SpinalBupivacaineKetoprofenAnalgesia, EpiduralSodium SalicylateNaloxoneCarrageenanTolmetinCyclooxygenase 2 InhibitorsBlood PlateletsDiclofenacAnalgesia, Patient-ControlledTreatment OutcomeKetorolacCyclooxygenase 1Time FactorsProspective StudiesFibrinolytic AgentsNefopamReceptors, OpioidHydrocodoneNarcotic AntagonistsPain, IntractableProstaglandin-Endoperoxide SynthasesNociceptionNeuralgiaHydromorphoneDrug InteractionsHemorrhageAsthma, Aspirin-InducedNalorphineIndomethacinEdemaAnticoagulantsAcupuncture AnalgesiaWarfarinTablets, Enteric-CoatedCyclohexanecarboxylic AcidsGastrointestinal HemorrhageBuprenorphineDrug Administration ScheduleAnti-Inflammatory AgentsNaproxenNociceptorsStomach UlcerBleeding TimePlatelet ActivationAdministration, OralPiroxicamAcetic AcidAnalgesia, ObstetricalThromboxanesButorphanolOxymorphoneRats, Sprague-DawleyMorphine DerivativesRisk FactorsThromboxane A2Cyclooxygenase 2MorphinansMeptazinolNociceptive Pain