Requesting MAID is a critical decision, one that cannot be undone once the process has been completed. To make a request, the patient must fully understand and make informed decisions regarding their health status and the care they need. In some circumstances, a patient with a mental illness may be eligible as long as they still have the capacity to consent. Eligibility is assessed by health professionals and a psychiatrist may be asked to give their opinion.

In such a context, it is obvious that a patient who does not have intellectual autonomy (due to a congenital condition or an acquired condition, like dementia) will never be able to request MAID.