Aminosalicylic AcidsMesalamineAminosalicylic AcidSulfapyridineSulfasalazineAnti-Inflammatory Agents, Non-SteroidalColitis, UlcerativeEnemaPhenylhydrazinesUrsodeoxycholic AcidCholagogues and CholereticsInflammatory Bowel DiseasesProctitisDelayed-Action PreparationsSuppositoriesAzathioprineGastrointestinal Agents6-MercaptopurineSulfanilamidesColonAnemia, MacrocyticAdministration, RectalBoric AcidsSalicylatesTablets, Enteric-CoatedAmyloseCrohn DiseaseColitisAnti-Inflammatory AgentsTabletsNicotinic AcidsDiphosphonatesChenodeoxycholic AcidDouble-Blind MethodAdministration, OralLiver Cirrhosis, BiliaryFolic AcidFolic Acid DeficiencyCholelithiasisIntestinal AbsorptionBone Density Conservation AgentsAnti-Ulcer AgentsTreatment OutcomePrednisoloneChemistry, PharmaceuticalAdrenal Cortex HormonesPatient ComplianceIntestinesImidazolesIleumDose-Response Relationship, Drug