Should I inform them of her dementia? Or just go with the flow?
The Dr will probably notice the behavior, and make mention of to you. Dr need all the info in order to treat your loved one holistically.
Barbara75 is correct. Dementia often affects other issues in the person battling this disease. Just think, more is better than too little information. Sometime what we think is nothing important may be pertinent to whatever is going on with your LO's (loved one's) health. Also, the Dr. will know you are thorough in your care of your LO.
I'm not sure about others, but I utilize an app which I maintain all prescriptions, BP (blood pressure), daily moods, etc. of my mom. It helps me to also keep such data at my finger tips for future doctor's visits. Although I am my mom's full-time caregiver, I treat it just like any full-time job; take notes, track meds and costs, use apps to assist finding the best deals for supplies, prepare myself with questions to ask during a drs. appt., etc.
You might want to keep some notes about her behavior, language difficulties,etc. You could even send these notes into the doctor so she will have time to read them before the appointment.
Please let the new Doctor know what meds she is on.