He has oxygen depravation memory trouble from CO PD. Fiancée is 70 years old. I am 66. He has short term memory loss due to COPD and a few other reasons. I want to know if meds used for Altzheimers and dementia would help him but his dr won't even address the issue. His dr is actually a nurse practitioner.he likes her and doesn't want to change. I left her for reasons of my own. I need ideas on how to proceed.