Dextroamphetamine. Its cognitive and behavioral effects in normal and hyperactive boys and normal men

Area of Science:

• Pharmacology
• Neuroscience
• Developmental Psychology

Background:

• Stimulant medications are commonly prescribed for Attention Deficit Hyperactivity Disorder (ADHD).
• Understanding the precise effects of stimulants on cognitive and behavioral functions across different age groups is crucial for optimizing treatment.
• Dextroamphetamine sulfate is a widely used central nervous system stimulant.

Purpose of the Study:

• To compare the effects of dextroamphetamine sulfate on motor activity, vigilance, learning, and mood in normal and hyperactive prepubertal boys versus normal college-aged men.
• To investigate potential age-related differences in the subjective and objective responses to stimulant medication.

Main Methods:

• A double-blind, crossover design was employed to administer a single oral dose of dextroamphetamine sulfate.
• Participants included normal and hyperactive prepubertal boys, and normal college-aged men.
• Objective measures of motor activity and vigilance, alongside subjective mood reports, were collected.

Main Results:

• Both boys and men exhibited decreased motor activity and increased vigilance after dextroamphetamine sulfate administration.
• Learning task performance improved in both groups following stimulant intake.
• Adult men reported euphoria, whereas boys described feeling "tired" or "different," indicating a potential age-related difference in mood response.

Conclusions:

• Dextroamphetamine sulfate demonstrates similar efficacy in improving motor activity, vigilance, and learning in both children and adults.
• Subjective mood effects of dextroamphetamine sulfate may differ between prepubertal children and adults, warranting further investigation into age-related pharmacologic responses.
• The findings suggest a broadly similar neurobiological action of stimulants across these age groups, despite variations in reported mood states.