Is it time to include people with intellectual disabilities in Royal Australian and New Zealand College of Psychiatrists' treatment guidelines?

Objective: The Royal Australian and New Zealand College of Psychiatrists' (RANZCP) treatment guidelines set the zeitgeist for psychiatric practice in Australasia. This review conceptualises the current approach to treatment of individuals with an intellectual disability and co-occurring mental illness in RANZCP guidelines, and its potential impact. Conclusions: The enduring omission of people with an intellectual disability and co-occurring mental illness from RANZCP clinical guidelines is a missed opportunity in normalising care and optimising outcomes for people with an intellectual disability. There are substantial cultural, political and historical overlays contributing to the ongoing divide between health and disability. In developing psychiatric guidelines, authors should consider including people with co-occurring intellectual disability as a specific population, that requires distinctive consideration.