DigoxinMedication ErrorsMedication AdherenceDigitoxinCardenolidesCardiotonic AgentsMedication ReconciliationMedication SystemsMedication Systems, HospitalCardiac GlycosidesMedigoxinEleutherococcusDrug InteractionsPolypharmacyDrug PrescriptionsPrescription DrugsPatient ComplianceSelf MedicationAnti-Arrhythmia AgentsDigitalis GlycosidesDrug TherapyNeriumPsychotropic DrugsDrug MonitoringDrug UtilizationTreatment OutcomeOuabainHeart FailureRadioimmunoassayAntipsychotic AgentsNonprescription DrugsP-GlycoproteinAntihypertensive AgentsAdministration, OralPharmaceutical Preparations