HydrocodoneIbuprofenTabletsHydromorphoneCodeineOxycodoneAnalgesics, OpioidTherapeutic EquivalencyOxymorphoneObstetric Surgical ProceduresAdministration, OralDelayed-Action PreparationsSubstance Abuse DetectionChemistry, PharmaceuticalAnti-Inflammatory Agents, Non-SteroidalAcetaminophenDouble-Blind MethodMorphine DerivativesCross-Over StudiesTablets, Enteric-CoatedNarcoticsMiosisCytochrome P-450 CYP2D6Pain, PostoperativeAntitussive AgentsBiological AvailabilityGas Chromatography-Mass SpectrometryMorphineOpioid-Related DisordersDose-Response Relationship, DrugDrug Administration ScheduleAnalgesics, Non-NarcoticPainExcipientsDrug Compounding