Many children and young people experience long-term difficulties after having a brain tumour. This paper discusses interventions using the medication methylphenidate and describes the current research in this area being conducted at the Great North Children's Hospital (Newcastle upon Tyne) and Newcastle University Centre for Cancer. The children, young people, and their families who use our hospital tell us that some of their most challenging difficulties only happened once the brain tumour treatment had finished. Some survivors of childhood brain tumour are left with lifelong disabilities that result from their cancer or treatment. These disabilities are often related to brain injury, and can be relatively invisible to the general public. Some disabilities only become apparent over the time following treatment. These are known as 'long-term late effects' . The most common long-term late effect that is reported after childhood brain tumour is an acquired brain injury. We see signs of an acquired brain injury following brain tumour in behaviour such as reduced attention, a reduction in ability to remember things, a slowing down of how quickly the child can take in information, and an impact on their academic performance and overall intellectual ability (IQ). Depending on the location of the tumour, brain injury can present in a different way. It is important to remember that the term 'brain injury' refers to any injury affecting the brain, so information on brain injury on the internet may not apply to the specific injury a child has acquired. A child can develop brain injury after a brain tumour due to one or many different factors, including any build-up of fluid in the brain before the tumour was discovered (hydrocephalus), surgery, post-surgical complications (such as posterior fossa syndrome), certain chemotherapies, or radiotherapy. Generally, the younger a child is at the time of diagnosis, the more likely they are to experience significant late effects.We have worked with a number of patients and their families in Newcastle at the Great North Children's Hospital to help us understand what the role of methylphenidate might be in helping to reduce long-term late effects that affect intellectual and academic ability. Methylphenidate is a medication that is used for a few different reasons. Usually people have heard of methylphenidate by one of its brand names, 'Ritalin' , which they know is used for children with Attention Deficit Hyperactivity Disorder (ADHD). We do not use this