MIL had a spell where her speech become garbled, she couldn't sit up or walk. A hospital stay showed nothing conclusive, no stroke. Symptoms were bilateral. Her balance is off so she went to rehab to see if some PT could help. She was totally uncooperative and they wound up sending her to hospital again. She is totally out of her mind now, hitting, biting etc. She keeps escaping (with people right next to her) falling. she acts like an injured animal and we don't know what to do next.
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But these symptoms must be really upsetting and frightening for all concerned and I don't know what to suggest that you're not already doing. How long has this been going on? The panicky aspect that you're describing does sound a bit like delirium - what's her blood work like? Any other possible infection going on? I'm afraid I'm purest guessing now.