Lack of effects of guanfacine on executive and memory functions in healthy male volunteers.

Rationale: Guanfacine is an alpha2-adrenergic receptor agonist that has been shown to have beneficial effects on working memory and attentional functions in monkeys and in patients with attention deficit hyperactivity disorder.

Objectives: The aim of this study was to further investigate the cognitive-enhancing properties of guanfacine using an established battery of tasks measuring executive and memory functions.

Methods: Sixty healthy male volunteers were randomised into three groups.