Objectives: In paediatric pharmacotherapy, many drugs are prescribed to be given in ways and for conditions not approved in the marketing authorization (MA). Thus, off-label prescribing of drugs with no MA is widespread in paediatric wards. However, drug MA status and clinical practices differ across countries. In this prospective study, we studied the prescribing of off-label and unlicensed drugs in three paediatric wards in a tertiary hospital in Finland. Furthermore, we reviewed previous published studies to provide an up-to-date international perspective on prescribing of off-label and unlicensed drugs for hospitalized children. Methods: During a 2-week period, prescriptions for patients under 18 years of age (median age 1AE6 years) in three wards; neonatal intensive care unit (NICU), general paediatric ward and paediatric surgical ward were recorded daily and drug-licensing status of all prescriptions was determined according to the approved summary of product characteristics. Published studies were retrieved through electronic searches, including MEDLINE (PubMed). Results: Of the 141 children, 108 received 629 prescriptions. Of the 108 children with a prescription, 82 (76%) had at least one off-label or unlicensed drug prescribed; 79% in the NICU, 63% in the general ward and 91% in the surgical ward (P = 0AE014). Of the 108 children with a prescription, 26 (24%) received prescriptions for licensed drugs, 71 (66%) received prescriptions off-label and 36 (33%) for unlicensed drugs. Of all 629 prescriptions, 321 (51%) were for licensed drugs, 226 (36%) for off-label and 82 (13%) for unlicensed drugs. International studies showed similar extents of off-label and unlicensed-drug prescribing. Conclusion: This study indicates that the use of off-label and unlicensed drugs is widespread in all the different paediatric wards surveyed and was as extensive as those reported for other countries.

The prescribing for off-label use and unauthorized medicines was more prevalent in 2011 than in 2001. This indicates that the recent legislation has had only minor or no impact on the authorizing status of medicines commonly used in paediatric inpatients in specialized care.

A considerable proportion of children use prescription and OTC medicines in Finland. Young age and health-related factors, morbidity and health status, and parental medicine use predicted children's medicine use. Further studies are needed to examine the association between parents' and children's medicine use.

One fifth of the Finnish children below 12 years of age had experienced DRPs. Appropriate counselling, including possible adverse drug reactions and dosing directions, is important for parents and children at both the prescribing and dispensing of medicines for paediatric patients. Reporting of any suspected serious or unexpected ADEs is an essential part of efficient pharmacovigilance in paediatrics.

The aim of this research is to study the prevalence of prescribing medicines for off-label (OL) use and unlicensed (UL) medicines for children during hospitalization in 2021 and to assess changes compared with 2011. Methods: The study included all patients aged <18 years who were treated in the neonatal intensive care unit (NICU) or general paediatric ward of Kuopio University Hospital (KUH), Finland, during 4 weeks in April and May 2021. Their background data and daily information on medicine prescriptions were collected from patient records. The prescriptions were classified as OL, UL or on-label/approved. The type of OL category was defined. Results: Altogether, 165 children aged 0-17 years (median 3.2 years) were treated in the paediatric wards (46 in the NICU and 119 in the general ward). In total, 1402 prescriptions were made for 153 children (93%). The proportion of OL and UL prescriptions decreased significantly from 55% in 2011 to 45% (age-adjusted proportion) in 2021 (P < .001). The proportion of patients receiving at least 1 UL medicine prescription decreased from 53% in 2011 to 30% (age-adjusted proportion) in 2021 (P < .001). About 76% of hospitalized children were still prescribed either OL prescription or UL medicine in 2021. Conclusion: The prescriptions for OL use and UL medicines were less prevalent in 2021 than 2011, but still a majority of hospitalized children were prescribed either medicine for OL use or UL medicine in 2021. This indicates a persisting need for approved medicines in children suggesting that revision of EU Paediatric Regulation 2007 is necessary.