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Volunteers Wanted for drug study

We are looking for volunteers to participate in a study investigating how the drugs Zolpidem and Donepezil affect our brain and visual skills. We would want you to be involved in the study on 3 days, each around a week apart. On each day of the study, you would be asked to participate for one session lasting around 5 hours.  

During each session, you will take one dose of an active drug (Zolpidem or Donepezil) or a sugar pill and perform behavioural tasks involving finger and hand movements. We will use non-invasive brain stimulation to measure the effects of the drugs on the brain.

We need right-handed volunteers, 18-35 years old, with a body weight 80-120Kg and a body mass index below 30Kg/m2. You must be in good health and without a history of epilepsy or any other disease affecting the brain or spinal cord.  If you are pregnant, you should not volunteer.

Sessions will take place at the John Radcliffe Hospital. You will be compensated for your time.

If you are interested or would like to know more, we would be happy to discuss the study further with you - please contact: 

Dr. Poly Frangou

Wellcome Centre for Integrative Neuroimaging (WIN), FMRIB
Oxford University

John Radcliffe Hospital                                  


01865 222734                                     

Email:polytimi.frangou at


Study Title: Effects of Zolpidem vs. Donepezil on visual processing and brain chemistry

Ethics reference: R75163/RE002                                        Version 2.0; 22/02/2024