Cited by 198Attention Deficit Hyperactivity DisorderNeurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology Research

The neuropharmacology of ADHD drugs in vivo: Insights on efficacy and safety

Heal, D.J., Cheetham, S.C., Smith, S.L.·2009·Neuropharmacology

Abstract

Results from in vivo techniques, especially intracerebral microdialysis in freely-moving rats, have provided insights into potential mechanisms responsible for the efficacy and safety of catecholaminergic drugs for ADHD treatment. The drugs reviewed come from distinct pharmacological classes: psychostimulant releasing agents, eg d-amphetamine; psychostimulant reuptake inhibitors, eg dl-threo-methylphenidate (dl-MPH), and non-stimulant reuptake inhibitors, eg atomoxetine. Psychostimulants, which currently deliver the best efficacy in treating ADHD, exhibit the following characteristics on extraneuronal catecholamine concentrations in rodent brain in vivo: 1) They enhance the efflux and function of both noradrenaline and dopamine in the central nervous system. 2) The increase of dopamine efflux that they produce is not limited to cortical regions. 3) They have a rapid onset of action with no ceiling on drug effect. d-Amphetamine has a mechanism independent of neuronal firing rate, displacing intraneuronal stores of catecholamines, delaying their reuptake and inhibiting catabolism by monoamine oxidase. dl-MPH has an enigmatic, extraneuronal action that is neuronal firing rate-dependent and reuptake transporter-mediated, yet paradoxically, almost as powerful as that of d-amphetamine. In safety terms, these powerful catecholaminergic effects also make the psychostimulants liable for abuse. Since efficacy and safety derive from the same pharmacological mechanisms, it has not yet been possible to separate these two components. However, the development of once-daily psychostimulant formulations and a prodrug, lisdexamfetamine, has improved patient compliance and markedly reduced scope for their diversion/abuse. This review will discuss the in vivo pharmacological profiles of approved catecholaminergic drugs for treatment of ADHD and implications for their clinical efficacy and abuse liability.

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Crossref · 10.1016/j.neuropharm.2009.08.020

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Authors
Heal, D. J., Cheetham, S. C., & Smith, S. L.
Affiliations
RenaSci (United Kingdom) (GB)
Corresponding author
Heal, D.J.
Venue
Neuropharmacology
Publisher
Elsevier BV
Published
2009-12
Volume
57
Issue
7-8
Pages
608-618
ISSN
0028-3908 (ISSN-L)
OpenAlex
W2077614189
Cited by
198
References
115
Citations by year
2026: 1 · 2025: 8 · 2024: 10 · 2023: 9 · 2022: 9 · 2021: 5 · 2020: 10 · 2019: 1 · 2018: 10 · 2017: 9 · 2016: 16 · 2015: 17 · 2014: 13 · 2013: 23 · 2012: 22
FWCI
2.40
Type
journal article
Language
en
Open access
closed
Locations
  • Neuropharmacology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Shire
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
attention deficit hyperactivity disorder, psychostimulants, d-amphetamine, methylphenidate, atomoxetine, dopamine efflux, noradrenaline efflux, intracerebral microdialysis, drug safety, abuse liability, lisdexamfetamine, prodrugs, monoamine oxidase inhibition
MeSH terms
Atomoxetine Hydrochloride, Amphetamine, Central Nervous System Stimulants, Animals, Attention Deficit Disorder with Hyperactivity, Brain, Catecholamines, Humans, Methylphenidate, Propylamines, Stereoisomerism, Dopamine Agents, Adrenergic Uptake Inhibitors, Substance-Related Disorders

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