Losartan and Emotional Processing in Young People

This study investigates whether losartan — a blood pressure medication — can change how young people emotionally process threatening or fear-related information. It is a research study in healthy young people (not a treatment trial), conducted in Oxford, UK. **You may be eligible if...** - You are a healthy young person (likely 16–30 years old, as 16–17 year olds need parental consent) - You are a non-smoker or light smoker (fewer than 5 cigarettes per day) - You can travel to Oxford for appointments - You are willing to share your GP's contact details **You may NOT be eligible if...** - You have or have ever had a significant mental health diagnosis (e.g., depression, anxiety disorder, schizophrenia) - You are taking any brain-affecting medications or blood pressure medications - You have kidney problems, very low blood pressure, or a history of epilepsy - You weigh less than 35 kg - You have a history of serious heart or blood vessel conditions - You have a first-degree family member with severe psychiatric illness Talk to your doctor to see if this trial is right for you.