It is estimated that there are close to 50 million people living with dementia worldwide, and this number is estimated to double every 20 years. Multimorbidity and polypharmacy are both prevalent amongst people with dementia, increasing the risk of medication-related harm. Medication-related harm is recognised as a global public health issue, as highlighted by the World Health Organisation’s global patient safety challenge, and it has been proposed that medication-related harm should be considered as a geriatric syndrome. This mixed-methods project will seek to generate evidence on the prevalence, severity and types of medication-related harm among people with dementia, and particularly within the primary healthcare setting. The project will seek to understand the context in which medication-related harm occurs in people with dementia and explore how strategies may be developed and implemented to reduce this harm and improve medication safety in this vulnerable patient population. The successful candidate will develop skills in both quantitative and qualitative research methodologies, which are widely used in health services research.