Effects of Methylphenidate on Sleep Functioning in Children with Attention-Deficit/Hyperactivity Disorder
Stephen P Becker1, Tanya E Froehlich, Jeffery N Epstein
1*Division of Behavioral Medicine and Clinical Psychology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH; †Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH; ‡Division of Developmental and Behavioral Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH.
Insights
Stimulant medication for attention-deficit/hyperactivity disorder (ADHD) can increase sleep problems, especially at higher doses and in children with lower weight. However, some children with pre-existing sleep issues improved on medication.
Area of Science:
- Pediatric Neurology
- Child Psychiatry
- Sleep Medicine
Background:
- Attention-deficit/hyperactivity disorder (ADHD) is a common neurodevelopmental disorder affecting children.
- Sleep disturbances are frequently reported in children with ADHD, impacting their daily functioning.
- Stimulant medications, like methylphenidate (MPH), are primary treatments for ADHD, but their effect on sleep is debated.
Purpose of the Study:
- To investigate the impact of stimulant medication (methylphenidate) on sleep functioning in children with ADHD.
- To identify predictors of sleep problems as a side effect of MPH treatment.
- To explore the relationship between MPH dosage and the emergence or resolution of sleep issues.
Main Methods:
- A 4-week randomized, double-blind, placebo-controlled trial involving 163 stimulant-naïve children (aged 7-11) diagnosed with ADHD.
- Administration of once-daily, long-acting methylphenidate (MPH) at varying doses.
- Weekly parent-rated side-effect assessments, including specific items on sleep problems.
Main Results:
- Parent-rated sleep problems increased with higher MPH doses, from 8% (placebo) to 25% (high dose).
- Children with lower weight and BMI showed a greater association with increased sleep problems during MPH titration.
- A significant portion of children with pre-existing sleep problems experienced improvement at the highest MPH dose.
Conclusions:
- MPH dosage is generally associated with increased sleep problems in children with ADHD, particularly those with lower weight/BMI.
- Pre-existing sleep problems in children with ADHD may improve with MPH treatment, challenging assumptions about avoiding titration.
- Further research is warranted to understand specific sleep domains affected by MPH and to identify predictors of persistent or improved sleep functioning.
Objective:
To examine the effects of stimulant medication on the sleep functioning of children with attention-deficit/hyperactivity disorder (ADHD) and identify predictors of sleep problems as a side effect of taking stimulant medication.
Method:
One hundred sixty-three stimulant-naïve children (72% boys) aged 7 to 11 years diagnosed with ADHD (120 with ADHD predominantly inattentive type, 43 with ADHD combined type) participated in a 4-week, randomized, double-blind, placebo-controlled trial of once-daily (long-acting) methylphenidate (MPH). Parents completed weekly side-effect ratings including an item related to sleep problems.
Results:
Ten percent of patients had parent-rated sleep problems before the initiation of medication. Rates of parent-rated sleep problems during MPH titration generally increased with increasing MPH dose (placebo: 8%; low dose: 18%; medium dose: 15%; high dose: 25%). Differences emerged between children with (n = 16) or without (n = 147) preexisting sleep problems. Although 23% of children without preexisting sleep problems went on to have sleep problems at the highest MPH dose, only 37.5% of children with preexisting sleep problems still had sleep problems at the highest MPH dose. Lower weight and lower body mass index (BMI) were associated with increased sleep problems during MPH titration.
Conclusion:
This study demonstrated a general association between increased MPH dose and increased sleep problems in children with ADHD, particularly for children of lower weight/BMI. However, a substantial proportion of children with preexisting sleep difficulties no longer had sleep problems on the highest MPH dose, which may help explain mixed findings reported to date in studies examining the impact of MPH on sleep functioning in children with ADHD and suggests that MPH dose titration should not be avoided solely on the basis of a child's premorbid sleep problems. Future research is needed to replicate and extend these findings to more specific domains of sleep functioning and to identify differences between children with persistent or improved sleep functioning as a result of MPH use.
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