Brief Answer:
Could be due to problems of the inner ear.

Detailed Answer:
Thanks for asking on HealthcareMagic.

I have gone through your query and understand your concerns.

You could be having sensorineural degradation of her hearing apparatus. The organ of hearing lies in our inner ear (vestibulocochlear apparatus) can also be associated with the sense of balance. Certain viral infections can give rise to such presentations as you have described but at advanced age like yours, degenerative changes are more likely.

I would suggest you get an audiometry done at first. It will possibly point to the underlying cause.

Meclizine is an over the counter medication that can help. Vestibulocochlear stabilizing agents like Cinnarizine or Betahistine might be needed but since these are prescription medicines you might need to visit a local physician to get these prescribed. Please do take plenty of water and fluids to remain well hydrated.

The blood glucose reading, although a bit higher, seems unrelated to this.

Let me know if I could help further.

Regards

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