Use of hypnotic drugs among children, adolescents, and young adults in Scandinavia

Prescription Trends of Medications Used to Treat Sleep Disturbances in School-Aged Children: An Interrupted Time-Series Analysis in France, 2016-2023

OBJECTIVE

To assess rates and trends of hypnotic medication prescriptions for children and adolescents.

STUDY DESIGN

Cross-sectional study of national dispensing data between January 1, 2016, and December 31, 2023, in France. Prescriptions of hypnotic medications (hydroxyzine, alimemazine, melatonin, and Z-drugs) dispensed to children aged 6-17 years were analyzed. Monthly rates of hypnotic prescriptions per 1000 children were modeled before and after the pandemic onset (March 2020) to assess rate and trend changes. Rate ratios (RRs) were calculated between estimated and expected prescription rates.

RESULTS

Overall, 2 675 142 prescriptions were dispensed to an average yearly population of 9 963 497 children. In January 2016, prescription rate of hypnotic medications was estimated at 1.9 per 1000 and at 6.8 per 1000 in December 2023, with postpandemic onset rates exceeding the expected by 131% (RR: 2.31, 95% CI: 2.08; 2.54). Prescription trends increased for all medications from -0.1% (95% CI: -0.2; 0.1%) per month prepandemic to +1.4% (95% CI: 1.2; 1.6%) after the pandemic onset for hydroxyzine; +0.1% (95% CI: 0.0; 0.2%) to +0.9% (95% CI: 0.7; 1.0%) for alimemazine; +2.2% (95% CI: 2.0; 2.3%) to +4.4% (95% CI: 3.9; 4.9%) for melatonin; and -3.2% (95% CI: -3.6;-2.8%) to +1.8% (95% CI: 1.4; 2.2%) for Z-drugs. Monthly prescription rates exceeded the expected by 38% (RR: 1.38, 95% CI: 1.31; 1.46) for hydroxyzine; 19% (RR: 1.19, 95% CI: 1.15; 1.22) for alimemazine; 344% (RR: 4.44, 95% CI: 4.07; 4.80) for melatonin; and 419% (RR: 5.19, 95% CI: 4.24; 6.14) for Z-drugs.

CONCLUSIONS

Recent substantial increases in hypnotic medication prescribing for children are possibly related to their persistently deteriorating mental health, changes in prescribing strategies, and/or unmet pre-existing needs.

Psychotropic drug use among children and adolescents in the Nordic countries: a systematic review

The Nordic countries have rather homogenous populations and similar health care systems, and one could therefore expect comparable levels of psychopathology and psychotropic drug use. However, recent studies show pronounced variations in psychotropic drug use among children and adolescents from different Nordic countries. Therefore, we aimed to conduct a systematic review of the literature examining the use of psychotropic drugs among children and adolescents in the Nordic countries. This review followed PRISMA guidelines. We searched PsycINFO, EMBASE and MEDLINE for population-based studies published 2010 or later that investigated prevalent or incident use of antidepressants, psychostimulants, antipsychotics, hypnotics, anxiolytics, and mood stabilizers among 0-19-year-olds in the Nordic countries. Two reviewers assessed all studies. Twenty-two out of 2142 eligible studies were included in the final review covering data collected from 1995 to 2018. The use of psychotropic drugs, except for anxiolytics, increased in most of the Nordic countries, but at different rates. Prevalent use of antidepressants was two to four times higher among Swedish children and adolescents compared to Danish and Norwegian peers. Prevalent use of psychostimulants, on the other hand, was two to sixfold higher in Iceland compared to the other Nordic countries. Finally, the prevalence of antipsychotic use was threefold higher in Finland compared to Sweden, Denmark, and Norway. This systematic review provides a thorough overview of psychotropic treatment of youths in the Nordic countries. We demonstrate a pronounced national variation in use of psychotropics that should be addressed further to facilitate rational pharmacotherapy in youths with psychiatric disorders.

Prescription drug use in Danish children and adolescents 2005-2023

Continuous monitoring of pediatric drug utilization is important for ensuring rational use and prioritizing research. This study provides an overview of pediatric prescription drug use among Danish children and adolescents from 2005-2023. Using Danish nationwide individual-level dispensing data, we identified all redeemed prescriptions for individuals < 18 years from January 2005-December 2023. We computed overall annual prevalence proportions of users and mean number of prescriptions per child. For all non-antibiotic drugs, we further determined the quantity of drug use measured in defined daily doses (DDDs) and stratified all analyses by age and Anatomical Therapeutic Chemical classification first and forth level. During the study period, the overall yearly prevalence of prescription drug use decreased due to reductions in antibiotic prescribing. When antibiotic prescriptions were disregarded, the prevalence of children with at least one prescription increased from 38% in 2005 to 42% in 2023, while the mean number of prescriptions and DDDs increased from 1.2 prescriptions per child and 51.2 million DDDs in 2005 to 1.5 prescriptions per child and 76.5 million DDDs in 2023. This increase was primarily driven by prescribing of central nervous system drugs to adolescents 12-17 years, with a substantial increase in centrally acting sympathomimetics and melatonin use. Overall pediatric drug prescribing is decreasing due to reduced antibiotic use. Non-antibiotic drug use is, however, rising, especially among adolescents and notably for psychotropic drugs. These findings underscore the importance of ongoing monitoring and call for further research into underlying causes and prescription practices for psychotropics.

Trends in the use and nonmedical use of sedatives-hypnotics in the population aged 12 to 64 years in Taiwan: a comparative analysis of the national surveys in 2014 and 2018

BACKGROUND

Many countries, including Taiwan, have tightened regulations on prescribing sedatives-hypnotics over the concern of their associated adverse health effects. However, it remains seldom investigated whether different age-sex strata have differential trends in national surveys over time for either the use or nonmedical use (NMU) of sedatives-hypnotics. Comparing Taiwan's two national surveys in 2014 and 2018, we aimed to examine (1) the population's trends for the prevalence of past-year use and NMU of sedatives-hypnotics overall and in age-sex strata; (2) trends for sociodemographic subgroups for those age-sex strata with significant changes in past-year use and NMU of sedatives-hypnotics over time; and (3) trends for sources of and motives for NMU of sedatives-hypnotics.

METHODS

The national survey enrolled 17,837 participants in 2014 (response rate = 62.2%) and 18,626 participants in 2018 (response rate = 64.6%) of citizens aged 12-64 years. Each participant anonymously completed a computer-assisted self-interview. The questionnaire consisted of sociodemographic variables and the use of various psychoactive substances and sedative-hypnotics, among others. NMU of sedative-hypnotics was defined as using the drug without a prescription, or more frequently, or in larger doses than prescribed. To compare the prevalence between the two waves, we conducted multivariable logistic regression analysis and the difference-in-differences in prevalence was examined with an interaction term between survey year and sex.

RESULTS

We found decreasing trends in young adult (18-39 years old) males for both past-year use (3.07-2.29%) and NMU (0.84-0.18%), but increasing trends in adolescents (0.42-0.80%) and young adult females (2.91-3.81%) for past-year use and in adolescents (0.16-0.39%) and middle-aged adult (40-64 years old) females (0.73-1.14%) for past-year NMU of sedatives-hypnotics. Among the young and middle-aged adult females, the increasing trends for past-year use and NMU, respectively, were found to occur mainly in certain sociodemographic subgroups, with alcohol users being the overlapping subgroup.

CONCLUSIONS

The differential trends over time of past-year use or NMU of sedatives-hypnotics in different age-sex strata in the population have policy implications to curtail the increasing trend over time.

Considerable paediatric drug dispensing - A nationwide study of more than 2 million Swedish children

AIM

The aim of the nationwide study was to describe paediatric drug utilisation in Sweden.

METHODS

Drug prescriptions dispensed to all children aged 0-17 years in 2019 were analysed using data from the Swedish National Prescribed Drug Register.

RESULTS

We retrieved data on 2 180 508 unique children. Nearly 4.6 million prescriptions were dispensed to children aged 0-17 years, and 52% of these were to boys. Just under half of the children (47%) were dispensed at least one drug: 48% of girls and 45% of boys (p < 0.01). More than a third (34%) were dispensed three or more different drugs during 2019. The number of dispensed prescriptions per 1000 children was higher in boys than girls up to 12 years of age (p < 0.01), and the opposite trend was observed from 13 years and above, even when we excluded contraceptives (p < 0.01). The most common therapeutic areas were drugs for the respiratory tract (25%), namely antihistamines, antiasthmatics and cough medication. These were followed by psychoanaleptics and melatonin for the nervous system (19%) and dermatologicals (16%), namely cortisone creams and emollients.

CONCLUSION

Paediatric drug use was common, and a considerable proportion of children were dispensed multiple drugs.

Combined association of insufficient physical activity and sleep problems with healthcare costs: a longitudinal study

BACKGROUND

The magnitude of economic losses attributed to sleep problems and insufficient physical activity (PA) remains unclear. This study aimed to investigate the association between insufficient PA, sleep problems, and direct healthcare costs.

OBJECTIVE

To investigate the association between insufficient physical activity (PA), sleep problems, and direct healthcare costs among adults.

DESIGN AND SETTING

Adults aged ≥ 50 years attended by the Brazilian National Health Service were tracked from 2010 to 2014.

METHODS

Direct healthcare costs were assessed using medical records and expressed in US$. Insufficient PA and sleep problems were assessed through face-to-face interviews. Differences were identified using the analysis of covariance and variance for repeated measures.

RESULTS

In total, 454 women and 166 men were enrolled. Sleep problems were reported by 28.9% (95%CI: 25.2% to 32.4%) of the sample, while insufficient PA was reported by 84.8% (95%CI: 82.1% to 87.6%). The combination of sleep problems and insufficient PA explained 2.3% of all healthcare costs spent on these patients from 2010 to 2014, which directly accounts for approximately US$ 4,765.01.

CONCLUSION

The combination of sleep problems and insufficient PA plays an important role in increasing direct healthcare costs in adults. Public health stakeholders, policymakers, and health professionals can use these results to reinforce the need for strategies to improve sleep quality and increase PA, especially in nations that finance their National Health Systems.

Morbidity among Adolescent Hypnotic Drug Users in Norway: An Observational Population-Based Study

We have previously shown that the use of hypnotic drugs increased among young Scandinavians during 2012-2018. This study aimed to explore psychiatric and somatic morbidity among adolescent hypnotic drug users in a cohort study of 13-17-year-old individuals during 2008-2018 in Norway. Data sources were (i) prescription data from the Norwegian Prescription Database linked to specialist health care diagnoses from the Norwegian Patient Registry and (ii) sleep disorder diagnoses from the Primary Health Care Database. Hypnotic drugs were defined as the sedative antihistamine alimemazine and the ATC group "Hypnotics and Sedatives" (N05C), excluding midazolam. In 2017, 2519 girls (16.5/1000) and 1718 boys (10.7/1000) were incident (new) users of hypnotic drugs. Most of these new users (82% of girls, 77% of boys) were referred to secondary health care, where the most frequent diagnoses were mental and behavioral disorders (51.8% of girls, 46.2% of boys), while only 3.2% received a specific sleep disorder diagnosis. The most common mental and behavioral disorders were "Neurotic stress-related disorders" among girls (27.4%) and "Behavioral and emotional disorders" among boys (23.6%). In conclusion, the trend of increasing hypnotic drug use among adolescents reflects the initiation of hypnotic drugs in a subgroup of the population with a higher disease burden, mainly due to psychiatric disorders, than the general population.

An online survey among general pediatricians on melatonin use in children with chronic insomnia

OBJECTIVES

Although melatonin (MLT) is the molecule most used by pediatricians for sleep problems, scarce evidence exists on its use in healthy pediatric population. The objective of this study was to describe MLT use by Italian pediatricians in healthy children with chronic insomnia.

STUDY DESIGN

A cross-sectional open survey was administered to Italian pediatricians, between June and November 2022, collecting information about their use of MLT in healthy children: age range of patients, dosages used, time of administration, duration of treatment, association with other treatments, perceived efficacy, and side effects. Data were reported as frequencies with their respective 95% confidence intervals. Chi-square statistics assessed significant differences between pediatricians who had training in pediatric sleep and those who did not.

RESULTS

Among 428 respondents, 97.4% of pediatricians used MLT; 87.3% of them prescribed MLT in children aged 1-2 years, 62.1% in 2-5 years and 42.5% in 10-18 years. 84.9% of them suggested to take MLT 30 min before bedtime. 37.9% indicated to continue treatment for one month, 30.2% for 2-3 months. 74.1% of pediatricians usually prescribed MLT 1 mg/day. The most frequent treatment associated with MLT was sleep hygiene (85.4%). Almost all pediatricians found MLT effective in reducing difficulties falling asleep. Only 3.2% of them reported mild side effects.

CONCLUSIONS

MLT is widely prescribed by Italian pediatricians, but no consensus exists about its use in typically developing children. There is a need for clear guidelines to optimize the use of MLT in healthy children.

Time trends in self-reported depressive symptoms, prescription of antidepressants, sedatives and hypnotics and the emergence of social media among Norwegian adolescents

BACKGROUND

Research has shown increased mental health problems and use of prescription drugs among adolescents in recent years and social media use has been linked to poorer mental health. However, trend studies concerning these topics are scarce. The purpose of this study was to analyze gender-specific trends in a) symptoms of depression and loneliness, and b) prescription of antidepressants, hypnotics and sedatives, in relation to the emergence of social media among adolescents in Norway.

METHODS

This is an ecological study using data from the 'Young in Oslo' surveys from 1996 to 2021. The surveys included approximately 110 000 students, 14-17 years of age, and yielded a response rate varying from 95% in 1996 to 64% in 2021. A self-report questionnaire was used to collect information on symptoms of depression and loneliness. Information on antidepressant and sleep medication prescription was retrieved from the Norwegian Prescription Database for the age group 15 to 19 years. A graphical approach and logistic regression models were used to examine gender-specific time-trends between 1996 to 2021.

RESULTS

We found a doubling in self-reported symptoms of depression and loneliness among girls between 1996 and 2021, with the steepest increase in the period from 2006 to 2012, when Facebook and other social media were introduced. A similar trend was observed in the prescription of antidepressants among girls, with the steepest increase between 2011 and 2013. Among both boys and girls, 'worried too much about things' and 'had sleep problems' were the two symptoms with the greatest changes.

CONCLUSION

A significant upward trend in self-reported depressive symptoms and medication use was observed over the past 25 years, with variations in the rate of increase, including a steeper trajectory during certain periods immediately after the introduction of social media platforms in Norway.

Killing pain?: a population-based registry study of the use of prescription analgesics, anxiolytics, and hypnotics among all children, adolescents and young adults in Norway from 2004 to 2019

The ongoing opioid epidemic has been a global concern for years, increasingly due to its heavy toll on young people's lives and prospects. Few studies have investigated trends in use of the wider range of drugs prescribed to alleviate pain, psychological distress and insomnia in children, adolescents and young adults. Our aim was to study dispensation as a proxy for use of prescription analgesics, anxiolytics and hypnotics across age groups (0-29 years) and sex over the last 15 years in a large, representative general population. The study used data from a nationwide prescription database, which included information on all drugs dispensed from any pharmacy in Norway from 2004 through 2019. Age-specific trends revealed that the prevalence of use among children and adolescents up to age 14 was consistently low, with the exception of a substantial increase in use of melatonin from age 5. From age 15-29, adolescents and young adults used more prescription drugs with increasing age at all time points, especially analgesics and drugs with higher potential for misuse. Time trends also revealed that children from age 5 were increasingly dispensed melatonin over time, while adolescents from age 15 were increasingly dispensed analgesics, including opioids, gabapentinoids and paracetamol. In contrast, use of benzodiazepines and z-hypnotics slightly declined in young adults over time. Although trends were similar for both sexes, females used more prescription drugs than their male peers overall. The upsurge in use of prescription analgesics, anxiolytics and hypnotics among young people is alarming.Trial registration The study is part of the overarching Killing Pain project. The rationale behind the Killing Pain research was pre-registered through ClinicalTrials.gov on April 7, 2020. Registration number NCT04336605; https://clinicaltrials.gov/ct2/show/record/NCT04336605 .

Sedative drug-use in Denmark, 2000 to 2019: a nationwide drug utilization study

AIM

To describe trends in and characteristics of sedative drug use from 2000 through 2019 in relation to the introduction of central regulations and new drugs.

METHODS

In this descriptive study, we used individual prescription data on the entire Danish population from the Danish National Prescription Registry to calculate yearly incidence and prevalence of use of benzodiazepines, benzodiazepine-related drugs (Z-drugs), melatonin, olanzapine, low-dose quetiapine, mianserin/mirtazapine, pregabalin, and promethazine from 2000 through 2019. From the Danish National Patient Registry, we obtained data on drug users' psychiatric and somatic comorbidity.

RESULTS

The use of benzodiazepines and Z-drugs declined gradually from 2000 through 2019, whereas the newer alternatives, melatonin, low-dose quetiapine, pregabalin and promethazine, increased in use, while the use of olanzapine and mianserin/mirtazapine was relatively stable. This development was seen in both men and women and across all age groups except for hypnotic benzodiazepines which showed a steep increase in the oldest age group from 2010. For all sedative drugs depression, anxiety, alcohol and misuse disorder, pain and cancer were the most prevalent comorbidities. During our study period, the number of individuals without any of the selected diagnoses increased.

CONCLUSION

In Denmark different central regulations have influenced prescription practice toward more restrictive use of Z-drugs and benzodiazepines, except for hypnotic benzodiazepine prescriptions increased after the introduction of special palliative care. An increase in use of newer sedative drugs, however, indicates that the regulations do not remove the need for sedative drugs in the population.

Melatonin use among children, adolescents, and young adults: a Danish nationwide drug utilization study

We aimed to provide a detailed description of the use of melatonin in Danish children, adolescents, and young adults during 2012-2019. We identified melatonin users 0-24 years of age (n = 43,652; median age 16 years) via the Danish nationwide health registers. Melatonin is a prescription drug in Denmark. The incidence of melatonin use increased from 2.4 to 3.9/1000 person-years during 2012 to 2019. Among 6,557 incident users in 2019, 53% filled only a single prescription within the first 6 months. Long-term use was most common among the younger age groups, with 17% of 5-9-year-olds and 14% of 10-13-year-olds being in continued treatment (no treatment breaks) 12 months after their first melatonin prescription. Disregarding treatment breaks, 3 in 10 were using melatonin 12 months after their first melatonin prescription and this proportion was also highest among 5-9-year-olds (63%) and 10-13-year-olds (51%). Psychopathology was common among melatonin users with 75% registered with either a psychiatric disorder diagnosis (54%), a filled prescription for another psychotropic (58%), or a contact to a private practice psychiatrist (15%) within ± 12 months of treatment initiation. General practitioners authorized melatonin prescriptions to almost half of all new users (48%), while psychiatric specialists authorized 37% of first prescriptions. In conclusion, the incidence of melatonin use increased in Denmark from 2012 to 2019. A substantial proportion of users had concurrent psychopathology most likely explaining their use of melatonin. Long-term melatonin use was more common among the youngest age groups, which should be a focus of interest due to limited safety data.

Trends in use of attention deficit hyperactivity disorder medication among children and adolescents in Scandinavia in 2010-2020

The objective of the study was to compare the use of attention deficit hyperactivity disorder (ADHD) medication among children and adolescents in Scandinavia 2010-2020. Using aggregated prescription data for individuals aged 5-19 years, we calculated annual prevalence proportions of ADHD medication (users/1000 inhabitants) for each country, overall and stratified by age and sex. Overall, use of ADHD medication increased during 2010-2020 in all countries. The increase was pronounced in Sweden reaching 35 users/1000 inhabitants in 2020 (119% increase), whereas it reached 22/1000 in Denmark and Norway (equivalent to a 38% and 16% increase, respectively). Methylphenidate was the most frequently used drug and Sweden had the highest use reaching 25/1000 in 2020 compared to 16/1000 and 18/1000 in Denmark and Norway, respectively. Lisdexamfetamine use increased steadily and was also highest in Sweden (13/1000 in 2020). In 2020, atomoxetine use was higher in Sweden (4.6/1000) and Denmark (4.5/1000) compared to Norway (2.2/1000). From 2015, use of guanfacine increased in Sweden reaching 4.4/1000 in 2020 but remained low in Denmark (0.4/1000) and Norway (0.7/1000). Use of dexamphetamine was low (ranging from 0.47 to 0.75/1000 in 2020) in the three countries. ADHD medication use was highest in Sweden across all age groups. In all countries, the prevalence was higher in males compared to females. In conclusion, use of ADHD medication among children and adolescents in Scandinavia is increasing. The prevalence of use is higher in Sweden for all drug groups compared to Norway and Denmark.

Use of melatonin for children and adolescents with chronic insomnia attributable to disorders beyond indication: a systematic review, meta-analysis and clinical recommendation

Background

Melatonin has become a widely used sleeping aid for young individuals currently not included in existing guidelines. The aim was to develop a recommendation on the use of melatonin in children and adolescents aged 2-20 years, with chronic insomnia due to disorders beyond indication.

Methods

We performed a systematic search for guidelines, systematic reviews, and randomised trials (RCTs) in Medline, Embase, Cochrane Library, PsycInfo, Cinahl, Guidelines International Network, Trip Database, Canadian Agency for Drugs and Technologies in Health, American Academy of Sleep Medicine, European Sleep Research Society and Scandinavian Health Authorities databases. A separate search for adverse events was also performed. The latest search for guidelines, systematic reviews, and adverse events was performed on March 17, 2023. The latest search for RCTs was performed on to February 6, 2023. The language was restricted to English, Danish, Norwegian, and Swedish. Eligible participants were children and adolescents (2-20 years of age) with chronic insomnia due to underlying disorders, in whom sleep hygiene practices have been inadequate and melatonin was tested. Studies exclusively on autism spectrum disorders or attention deficit hyperactive disorder were excluded. There were no restrictions on dosage, duration of treatment, time of consumption or release formula. Primary outcomes were quality of sleep, daytime functioning and serious adverse events, assessed at 2-4 weeks post-treatment. Secondary outcomes included total sleep time, sleep latency, awakenings, drowsiness, quality of life, non-serious adverse events, and all-cause dropouts (assessed at 2-4 weeks post-treatment), plus quality of sleep and daytime functioning (assessed at 3-6 months post-treatment). Pooled estimates were calculated using inverse variance random effects model. Statistical heterogeneity was calculated using I2 statistics. Risk of bias was assessed using Cochrane risk of bias tool. Publication bias was assessed using funnel plots. A multidisciplinary guideline panel constructed the recommendation using Grades of Recommendation, Assessment, Development and Evaluation (GRADE). The certainty of evidence was considered either high, moderate, low or very low depending on the extent of risk of bias, inconsistency, imprecision, indirectness, or publication bias. The evidence-to-decision framework was used to discuss the feasibility and acceptance of the constructed recommendation and its impact on resources and equity. The protocol is registered with the Danish Health Authority.

Findings

We identified 13 RCTs, including 403 patients with a wide range of conditions. Melatonin reduced sleep latency by 14.88 min (95% CI 23.42-6.34, 9 studies, I2 = 60%) and increased total sleep time by 18.97 min (95% CI 0.37-37.57, 10 studies, I2 = 57%). The funnel plot for total sleep time showed no apparent indication of publication bias. No other clinical benefits were found. The number of patients experiencing adverse events was not statistically increased however, safety data was scarce. Certainty of evidence was low.

Interpretation

Low certainty evidence supports a moderate effect of melatonin in treating sleep continuity parameters in children and adolescents with chronic insomnia due to primarily medical disorders beyond indication. The off-label use of melatonin for these patients should never be the first choice of treatment, but may be considered by medical specialists with knowledge of the underlying disorder and if non-pharmacological interventions are inadequate. If treatment with melatonin is initiated, adequate follow-up to evaluate treatment effect and adverse events is essential.

Funding

The Danish Health Authority. The Parker Institute, Bispebjerg and Frederiksberg Hospital, supported by the Oak Foundation.

Use of melatonin in children and adolescents with idiopathic chronic insomnia: a systematic review, meta-analysis, and clinical recommendation

Background

Melatonin prescriptions for children and adolescents have increased substantially during the last decade. Existing clinical recommendations focus on melatonin as a treatment for insomnia related to neurodevelopmental disorders. To help guide clinical decision-making, we aimed to construct a recommendation on the use of melatonin in children and adolescents aged 5-20 years with idiopathic chronic insomnia.

Methods

A systematic search for guidelines, systematic reviews and randomised controlled trials (RCT) were performed in Medline, Embase, Cochrane Library, PsycInfo, Cinahl, Guidelines International Network, Trip Database, Canadian Agency for Drugs and Technologies in Health, American Academy of Sleep Medicine, European Sleep Research Society and Scandinavian Health Authorities databases. A search for adverse events in otherwise healthy children and adolescents was also performed. The latest search for guidelines, systematic reviews, and adverse events was performed on March 18, 2023. The latest search for RCTs was performed on to February 6, 2023. The language was restricted to English, Danish, Norwegian, and Swedish. Eligible participants were children and adolescents (5-20 years of age) with idiopathic chronic insomnia, in whom sleep hygiene practices have been inadequate and melatonin was tested. There were no restrictions on dosage, duration of treatment, time of consumption, or release formula. Primary outcomes were quality of sleep, daytime functioning and serious adverse events. Secondary outcomes included total sleep time, sleep latency, awakenings, drowsiness, quality of life, all-cause dropouts, and non-serious adverse events. Outcomes were assessed at different time points to assess short-term and long-term effects. Meta-analysis was performed using inverse variance random-effects model and risk of bias was assessed using Cochrane risk of bias tool. If possible, funnel plots would be constructed to investigate publication bias. Heterogeneity was calculated via I2 statistics. A multidisciplinary guideline panel formulated the recommendation according to Grading of Recommendations Assessment, Development and Evaluation (GRADE). The certainty of evidence was considered either high, moderate, low or very low depending on the extent of risk of bias, inconsistency, imprecision, indirectness, or publication bias. The evidence-to-decision framework was subsequently used to discuss the feasibility and acceptance of the constructed recommendation alongside the impact on resources and equity. The protocol is registered with the Danish Health Authority.

Findings

We included eight RCTs with 419 children and adolescents with idiopathic chronic insomnia. Melatonin led to a moderate increase in total sleep time by 30.33 min (95% confidence interval (CI) 18.96-41.70, 4 studies, I2 = 0%) and a moderate reduction in sleep latency by 18.03 min (95% CI -26.61 to -9.44, 3 studies, I2 = 0%), both as assessed by sleep diary. No other beneficial effects were found. None of the studies provided information on serious adverse events, yet the number of participants experiencing non-serious adverse events was increased (Relative risk 3.44, 95% CI 1.25-9.42, 4 studies, I2 = 0%). Funnel plots were not constructed due to the low number of studies. The certainty of evidence was very low on the quality of sleep and low for daytime functioning.

Interpretation

Evidence of very low certainty shows that benefits are limited and unwanted events are likely when melatonin is used to treat otherwise healthy children and adolescents with chronic insomnia. Melatonin should never be the first choice of treatment for this particular population, yet carefully monitored short-term use may be considered if sleep hygiene practices and non-pharmacological interventions have proven inadequate, and only if daytime function is compromised.

Funding

The Danish Health Authority and the Parker Institute, Bispebjerg and Frederiksberg Hospital supported by the Oak Foundation.

The short-term and long-term adverse effects of melatonin treatment in children and adolescents: a systematic review and GRADE assessment

Background

Currently, melatonin is used to treat children and adolescents with insomnia without knowing the full extent of the short-term and long-term consequences. Our aim was to provide clinicians and guideline panels with a systematic assessment of serious-and non-serious adverse events seen in continuation of melatonin treatment and the impact on pubertal development and bone health following long-term administration in children and adolescents with chronic insomnia.

Methods

We searched PubMed, Embase, Cinahl and PsycINFO via Ovid, up to March 17, 2023, for studies on melatonin treatment among children and adolescents (aged 5-20 years) with chronic insomnia. The language was restricted to English, Danish, Norwegian, and Swedish. Outcomes were non-serious adverse events and serious adverse events assessed 2-4 weeks after initiating treatment and pubertal development and bone health, with no restriction on definition or time of measurement. Observational studies were included for the assessment of long-term outcomes, and serious and non-serious adverse events were assessed via randomised studies. The certainty of the evidence was assessed using Grades of Recommendation, Assessment, Development and Evaluation (GRADE). The protocol is registered with the Danish Health Authority.

Findings

We identified 22 randomised studies with 1350 patients reporting on serious-and non-serious adverse events and four observational studies with a total of 105 patients reporting on pubertal development. Melatonin was not associated with serious adverse events, yet the number of patients experiencing non-serious adverse events was increased (Relative risk 1.56, 95% CI 1.01-2.43, 17 studies, I² = 47%). Three studies reported little or no influence on pubertal development following 2-4 years of treatment, whereas one study registered a potential delay following longer treatment durations (>7 years). These findings need further evaluation due to several methodological limitations.

Interpretation

Children who use melatonin are likely to experience non-serious adverse events, yet the actual extent to which melatonin leads to non-serious adverse events and the long-term consequences remain uncertain. This major gap of knowledge on safety calls for caution against complacent use of melatonin in children and adolescents with chronic insomnia and for more research to inform clinicians and guideline panels on this key issue.

Funding

The Danish Health Authority. The Parker Institute, Bispebjerg and Frederiksberg Hospital, supported by the Oak Foundation.

The Role of Supplements and Over-the-Counter Products to Improve Sleep in Children: A Systematic Review

The sleep-wake cycle is a complex multifactorial process involving several neurotransmitters, including acetylcholine, norepinephrine, serotonin, histamine, dopamine, orexin and GABA, that can be, in turn, regulated by different nutrients involved in their metabolic pathways. Although good sleep quality in children has been proven to be a key factor for optimal cognitive, physical and psychological development, a significant and ever-increasing percentage of the pediatric population suffers from sleep disorders. In children, behavioral interventions along with supplements are recommended as the first line treatment. This systematic review was conducted, according to the PRISMA guidelines, with the purpose of assessing the principal nutrients involved in the pathways of sleep-regulating neurotransmitters in children and adolescents. Our focus was the utilization of over the counter (OTC) products, specifically iron, hydroxytryptophan, theanine and antihistamines in the management of different pediatric sleep disorders with the intention of providing a practical guide for the clinician.

Melatonin Prescription in Children and Adolescents in Relation to Body Weight and Age

The prescription of melatonin to children and adolescents has increased dramatically in Sweden and internationally during the last ten years. In the present study we aimed to evaluate the prescribed melatonin dose in relation to body weight and age in children. The population-based BMI Epidemiology Study Gothenburg cohort has weight available from school health care records, and information on melatonin prescription through linkage with high-quality national registers. We included prescriptions of melatonin to individuals below 18 years of age where a weight measurement not earlier than three months before, or later than six months after the dispensing date, was available (n = 1554). Similar maximum doses were prescribed to individuals with overweight orobesity as to individuals with normal weight, and to individuals below and above 9 years of age. Age and weight only explained a marginal part of the variance in maximum dose, but were inversely associated and explained a substantial part of the variance in maximum dose per kg. As a result, individuals overweight or with obesity, or age above 9 years, received lower maximum dose per kg of body weight, compared with individuals with normal weight or below 9 years of age. Thus, the prescribed melatonin dose to individuals under 18 years of age is not primarily informed by body weight or age, resulting in substantial differences in prescribed dose per kg of body weight across BMI and age distribution.

Adverse events in long-term studies of exogenous melatonin

INTRODUCTION

Exogenous melatonin is regulated as a drug in the UK and EU but is available as an over-the-counter dietary supplement in the US and Canada. In the last 15 years, melatonin use has increased rapidly in many countries, in particular, in children and adolescents who frequently have many years of continuous exposure. Despite this, the potential risks associated with extended use continue to be unclear, and there remains a lack of systematically assessed safety data from long-term prospective trials.

AREAS COVERED

This review focuses on adverse event data reported in long-term (≥6 months) prospective trials of melatonin.

METHODS

The Embase and Medline electronic databases were searched from inception to 12 September 2022 for long-term studies of melatonin, in which adverse events were systematically monitored and reported.

EXPERT OPINION

Although the reported frequency of possible adverse events associated with long-term melatonin use is low and few clinically significant adverse events have been reported, the scarcity of data from double-blind randomized placebo-controlled trials should caution against complacency. Ideally, analysis of data from large well-established research databases should be conducted to provide good quality evidence on which to base a more rigorous evaluation of the safety profile.