If we have carbon dioxide coming out of our lungs as we breathe, and carbon dioxide has the potential to kill us, what happens if we repeatedly inhale our own carbon waste?

Aclient who has alzheimer disease is hospitalized with new-onset angina. her husband tells you he does not sleep well because he needs to be sure she does not wander during the night. he insists on checking each of the medications you give the client to be sure they are "the same pills she takes at home." based on this information, which nursing diagnosis is most appropriate for this client?