Not to comment on the overall ethical situation (dunno what constitutes informed consent for an alzheimer's patient in Brazil, presumably it involves some legal

Not to comment on the overall ethical situation (dunno what constitutes informed consent for an alzheimer's patient in Brazil, presumably it involves some legal guardian), but this is a doctor reporting on an individual treatment of their patient. It is not a research study. Doctors have wide latitude in treating their own patients, they do not require board approval to do so.