TabletsDelayed-Action PreparationsChemistry, PharmaceuticalNifedipineTablets, Enteric-CoatedMethylcelluloseExcipientsGuanfacinePolymethacrylic AcidsDrug CompoundingSublimationFelodipineTechnology, PharmaceuticalPhenylpropanolamineSolubilityDrug StorageAdministration, OralPovidoneOxymorphoneCyclohexanesCyclohexanolsCresolsNiacinBenzilatesDrug StabilityMethylphenidateUrinary Bladder, OveractiveCalcium Channel BlockersCross-Over StudiesAdrenergic alpha-2 Receptor AgonistsAcrylatesMetoprololAntidepressive Agents, Second-GenerationMuscarinic AntagonistsBiological AvailabilityDouble-Blind MethodCentral Nervous System StimulantsBenzhydryl CompoundsPhenylalanineAttention Deficit Disorder with HyperactivityDose-Response Relationship, DrugHydrogen-Ion ConcentrationDrug CombinationsCalciumArea Under CurveTreatment OutcomeDrug Administration ScheduleHypolipidemic AgentsDrug Therapy, CombinationDiltiazemPowdersVerapamilHistamine ReleaseCalcium Channels