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Effects of Caffeinated Drinks on the Brain and Reaction Time

Effect of caffeinated drink on cortical excitability and reaction time among healthy young adult volunteers: a blinded randomised crossover trial

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
CTRI
Registry ID
CTRI/2026/01/102078
Enrollment
32
Registered
2026-01-27
Start date
Unknown
Completion date
Unknown
Last updated
2026-02-02

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

Conditions

None listed

Interventions

Intervention1: Caffeine: Caffeine will be administered orally in the form of a caffeinated drink at a dose of three milligram per kilogram body weight. This is considered a moderate and safe dose base

Sponsors

AIIMS Bhopal
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: Male participants aged 18 to 29 years Right handed individuals Apparently healthy volunteers capable of providing written informed consent

Exclusion criteria

Exclusion criteria: Overweight or obese participants with body mass index more than 25 Self reported history of tobacco use in any form History of epilepsy or seizures Presence of metallic implants or any contraindication to transcranial magnetic stimulation History of neuropsychiatric disorders History of chronic debilitating illness History of intellectual disability History of brain trauma or brain surgery Current or recent use of any prescription or non prescription drugs that may affect cortical excitability or caffeine metabolism

Design outcomes

Primary

MeasureTime frame
Corticomotor excitability will be assessed using single-pulse TMS. The primary outcome will be resting motor threshold (MT). Secondary outcomes will include motor evoked potential (MEP) amplitude and MEP latency.Timepoint: Bassline to 2 Month

Secondary

MeasureTime frame
Reaction time performance will be assessed by measuring simple and choice reaction time (RT), defined as the time taken by the participant to execute a mechanical response following the presentation of single and multiple visual stimuli, respectively. Error percentage will also be recorded. Reaction time will be measured using the open-access and user-friendly Computerized Reaction Time Test (Deary Liewald Reaction Time Task).Timepoint: Bassline to 2 Month

Countries

India

Contacts

Public ContactDr Santosh L wakode

AIIMS Bhopal

santosh.physiology@aiimsbhopal.edu.in9423446073

Outcome results

None listed

Source: CTRI (via WHO ICTRP) · Data processed: Feb 7, 2026