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Effects of methylphenidate on sleep in children with attention-deficient hyperactivity disorder. An activity monitor
1Hannah Khoushy Child Development Center, Bnai Zion Medical Center, Haifa, Israel.
Insights
Methylphenidate hydrochloride may shorten sleep duration in children with attention-deficit hyperactivity disorder (ADHD). However, it does not appear to negatively impact sleep patterns and may even normalize them in ADHD patients.
Area of Science:
- Pediatric Neurology
- Sleep Medicine
- Pharmacology
Background:
- Attention-deficit hyperactivity disorder (ADHD) is a common neurodevelopmental disorder.
- Sleep disturbances are frequently reported in children with ADHD.
- The impact of stimulant medication on sleep in this population requires further investigation.
Purpose of the Study:
- To evaluate the effects of methylphenidate hydrochloride on sleep patterns in children diagnosed with ADHD.
- To compare sleep patterns during methylphenidate treatment, placebo, and baseline conditions.
- To assess differences in sleep between children with ADHD and healthy controls.
Main Methods:
- A double-blind, placebo-controlled, cross-over study design was employed.
- Ten children diagnosed with ADHD and 20 age- and sex-matched healthy controls participated.
- Sleep patterns were monitored at home using activity monitoring during baseline, placebo, and methylphenidate treatment phases.
Main Results:
- Methylphenidate hydrochloride treatment resulted in a shorter total sleep duration compared to baseline and placebo.
- No significant differences in quiet sleep were observed between the ADHD group and controls during methylphenidate treatment.
- Sleep pattern stability was maintained, with no other significant differences found between groups or treatment conditions.
Conclusions:
- The findings suggest that ADHD may be a disorder related to central hypoarousal.
- Methylphenidate hydrochloride does not appear to adversely affect sleep patterns in children with ADHD.
- The medication may potentially normalize sleep patterns in this patient group.
Objective:
To assess the effects of methylphenidate hydrochloride on sleep patterns in children diagnosed as having attention-deficit hyperactivity disorder (ADHD).
Design:
A double-blind, controlled drug-placebo cross-over design.
Setting:
Home.
Subjects:
Ten children (aged 6 years 9 months to 12 years & months) diagnosed as having ADHD were consecutively recruited and compared with age- and sex-matched normal controls.
Treatment:
Methylphenidate hydrochloride (0.3 to 0.4 mg/kg) or placebo was administered at 7:30 AM.
Measurements And Results:
Each child underwent activity monitoring at home during 6 days of no treatment (baseline) followed by placebo and methylphenidate treatment. The results of the three trial stages, as well as those of the 20 age- and sex-matched normal controls, were compared. A shorter total sleep duration was evident during the methylphenidate treatment compared with that of baseline and placebo treatment. The amount of quiet sleep was lower (however, not significantly) among the study group compared with controls, whereas no such difference was noted during methylphenidate treatment. Night-to-night sleep pattern stability was found. No other differences were found either between children with ADHD and controls or between on and off stages of methylphenidate treatment.
Conclusions:
These results support the notion that ADHD is a centrally generated disorder attributable to hypoarousal, which subsequently stimulates motor overactivity. Methylphenidate does not appear to affect sleep patterns adversely and possibly normalizes them in patients with ADHD.
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Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings.