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The impact of Clonidine, a pharmacological treatment for attention deficit hyperactivity disorder (ADHD), on behavioural and brain imaging measures of attention, inhibition and error processing.

A randomised, placebo controlled trial of the effects of Clonidine (200 mcg) on cognitive control and error processing measures (recorded with electroencephalogram (EEG) during behavioural tasks) in a sample of 26 healthy adult males.

Status
Recruiting
Phases
Phase 4
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12615000093583
Enrollment
26
Registered
2015-02-04
Start date
2015-02-03
Completion date
Unknown
Last updated
2020-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Brief summary

This study assesses the impact of Clonidine a commonly prescribed medication for the treatment of Attention Deficit hyperactivity Disorder (ADHD) on behavioural and brain imaging measures of cognition. Specifically, it measures the impact of Clonidine on key behaviours that are altered in ADHD including, response inhibition, attention and error processing.

Interventions

A randomised placebo controlled trial of the effects of Clonidine (200mcg) on cognitive control and error processing measures in healthy adults. Clonidine trade name: Catapress Participants will receive each of Clonidine and placebo in capsule form (1 week apart, order of administration randomised). The Experimenter will observe ingestion of the capsule (time 0), participants will commence tasks after 90 minutes has elapsed (onset of drug peak), task will be completed at 180 minutes, observa

A randomised placebo controlled trial of the effects of Clonidine (200mcg) on cognitive control and error processing measures in healthy adults. Clonidine trade name: Catapress Participants will receive each of Clonidine and placebo in capsule form (1 week apart, order of administration randomised). The Experimenter will observe ingestion of the capsule (time 0), participants will commence tasks after 90 minutes has elapsed (onset of drug peak), task will be completed at 180 minutes, observation will then occur for half an hour before completion at 210 minutes.

Sponsors

Professor Mark Bellgrove
Lead SponsorIndividual

Study design

Allocation
Randomised controlled trial
Intervention model
Crossover
Primary purpose
Treatment
Masking
Blinded (masking used) (Subject, Caregiver, Outcomes Assessor)

Eligibility

Sex/Gender
Male
Age
18 Years to 40 Years
Healthy volunteers
Yes

Inclusion criteria

healthy adult Normal or corrected to normal vision

Exclusion criteria

History of psychiatric illness Currently on medication Smoker Regular recreational drug use

Outcome results

None listed

Source: ANZCTR · Data processed: Feb 4, 2026