RESUMEN
Since the influenza season 2018/19, the Italian Ministry of Health recommended a dose of cell-based quadrivalent vaccine (Flucelvax Tetra) for HCWs (healthcare workers), because this vaccine seemed more efficacious in the prevention of AH3N2 virus. Due to the lack of pre-registration data, the safety profile of this new vaccine must be investigated in post-marketing surveillance. The aim of our study is to evaluate, through a post-marketing active surveillance program developed during the 2019/20 influenza season, any Adverse Events Following Immunization (AEFIs) that happened in the 7 days after immunization with Flucelvax Tetra. The study was carried out in a sample of HCWs of Policlinico General University-Hospital (Apulia, South Italy). AEFIs were classified as 'serious' or 'not serious' according to the WHO (World Health Organization) guidelines; the WHO causality assessment algorithm was applied to classify serious AEFIs. A total of 741 HCWs were enrolled, and 430 AEFIs (reporting rate: 58.0 (95%CI: 54.4-61.6) × 100 enrolled) were recorded. Of these, 429 of 430 (99.8%; reporting rate: 57.8 (95%CI: 54.2-61.5) × 100 enrolled) were classified as not serious and one (0.2%; reporting rate: 0.13 (0.03-0.75) × 100 enrolled) was classified as serious. Local reactions were the adverse reaction reported most frequently (88%); regarding the serious AEFI, causality assessment excluded the causal link with the administration of the vaccine. All the AEFIs resolved without sequelae. Flucelvax Tetra showed a profile of high safety. Due to their characteristics of greater sensitivity than passive surveillance, active surveillance programs can be useful in defining the safety profiles of a given vaccine/drug in certain population subgroups.
RESUMEN
OBJECTIVE: Many drugs used for children are not licensed or are used off-label. An increased risk of medication errors and unexpected adverse drug reactions (ADR) associated with off-label and unlicensed drug prescription has been reported. This risk increases in the newborn, who are more likely to be predisposed to an ADR due to their physiological immaturity. The objective of this study was to describe the use of unlicensed or off-label drugs in a Neonatal Intensive Care Unit (NICU). METHODS: All drugs prescribed to newborn admitted to the Neonatology Unit of Bari University Hospital, from July 1st to August 31st in 2004 were recorded. MAIN OUTCOME MEASURES: All the drugs prescribed were analysed with regard to their license status, then the licensed drugs were compared to the indications, dose, route of administration, duration of treatment, contraindications and warnings specified in the summary of product characteristics of the marketing authorization. RESULTS: Data were collected on 176 prescriptions for 61 different drugs given to 34 newborns. Drugs were licensed in 88% and unlicensed in 12% of cases. About the licensed drugs, in 37.5% medicines were used following the terms of the marketing authorization, in 22.7% of cases medicines were used in an off-label manner as they contained no information for paediatric use in the marketing authorization and in 27.8% of cases medicines were licensed for paediatric use, but they were used off-label with regard to age, dose, route of administration and duration of treatment. CONCLUSIONS: Despite European and American initiatives aiming to promote greater awareness and research in the paediatric population, these data demonstrate that there is still a high percentage of unlicensed or off-label drugs use in neonatology, underlining the need to stimulate scientific data collection by means of experimental studies or outcome research.
