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Can you tell me the seizure like episodes? Did she have EEG?
It doesn't seem to be seizure because it doesn't cause headaches. It could be due to cerebral hypoperfusion from POTS. She should have POTS controlled well. She should avoid precipitating factors, and physical activity should be encouraged. We suggest volume repletion and fludrocortisone (0.05 to 0.2 mg per day) as the first line of therapy. She should also try midodrine or beta blocking agents.
She should see a neurologist.