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Clinical utility of guanfacine extended release in the treatment of ADHD in children and adolescents

Authors Bello N

Received 15 May 2015

Accepted for publication 11 June 2015

Published 30 June 2015 Volume 2015:9 Pages 877—885


Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Doris Leung

Peer reviewer comments 3

Editor who approved publication: Dr Johnny Chen

Nicholas T Bello

Department of Animal Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA

Abstract: Attention deficit hyperactivity disorder (ADHD) is the most common psychiatric illness in children and adolescents. Several stimulant medications, such as methylphenidate and amphetamine derivatives, are available to treat ADHD in pediatric patients. Nonstimulant medications are more preferred by some parents, other caregivers, and patients because they lack the abuse potential of stimulant medications. In the US, one available nonstimulant option is guanfacine extended release (XR). As a selective α2A adrenergic receptor, guanfacine acts on the central noradrenergic pathways and cortical noradrenergic targets to improve working memory and attention. The XR formulation of guanfacine, compared with the immediate-release formulation, is more effective for the long-term management of ADHD and is associated with fewer adverse effects. Available data also indicate that guanfacine XR is superior to atomoxetine and is as effective as the nonselective α2 adrenergic receptor agonist, clonidine XR. The most common adverse effects associated with guanfacine XR are somnolence, fatigue, bradycardia, and hypotension. Somnolence is the most often cited reason for discontinuation. Guanfacine XR is also labeled for use as an adjuvant to stimulant treatment for ADHD. A similar profile of adverse effects as reported with monotherapy is reported when guanfacine XR is “added on” to stimulant therapy with somnolence as the most commonly reported adverse event. This review discusses the clinical efficacy and patient preference of guanfacine XR based on available published data on the safety, relative effectiveness, and tolerance of this medication to treat ADHD.

Keywords: Intuniv, norepinephrine, prefrontal cortex, locus coeruleus, impulsivity, inattentive

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