Long term methylphenidate exposure and growth in children and adolescents with ADHD. A systematic review and meta-analysis

Neurosci Biobehav Rev. 2021 Jan:120:509-525. doi: 10.1016/j.neubiorev.2020.09.031. Epub 2020 Oct 17.

Abstract

Background: Methylphenidate (MPH) is an efficacious treatment for ADHD but concerns have been raised about potential adverse effects of extended treatment on growth.

Objectives: To systematically review the literature, up to December 2018, conducting a meta-analysis of association of long-term (> six months) MPH exposure with height, weight and timing of puberty.

Results: Eighteen studies (ADHD n = 4868) were included in the meta-analysis. MPH was associated with consistent statistically significant pre-post difference for both height (SMD = 0.27, 95% CI 0.16-0.38, p < 0.0001) and weight (SMD = 0.33, 95% CI 0.22-0.44, p < 0.0001) Z scores, with prominent impact on weight during the first 12 months and on height within the first 24-30 months. No significant effects of dose, formulation, age and drug-naïve condition as clinical moderators were found. Data on timing of puberty are currently limited.

Conclusions: Long-term treatment with MPH can result in reduction in height and weight. However, effect sizes are small with possible minimal clinical impact. Long-term prospective studies may help to clarify the underlying biological drivers and specific mediators and moderators.

Keywords: Attention deficit/hyperactivity disorder (ADHD); growth; height; methylphenidate; puberty; stimulants; weight.

Publication types

  • Meta-Analysis
  • Research Support, Non-U.S. Gov't
  • Review
  • Systematic Review

MeSH terms

  • Adolescent
  • Attention Deficit Disorder with Hyperactivity* / drug therapy
  • Body Weight
  • Central Nervous System Stimulants* / therapeutic use
  • Child
  • Humans
  • Methylphenidate* / therapeutic use
  • Prospective Studies
  • Treatment Outcome

Substances

  • Central Nervous System Stimulants
  • Methylphenidate