Seizure Like Episodes With Black Out. Did Spinal Tap And MRI. On Medication For ADHD. Causes?

A friend of mine is in the hospital right now for seizure like episodes. The doctors have ruled out epilepsy . Her body will shake and she cannot control her movement. She blacks out , but can hear those who speak to her while the episode occurs. They are abrupt, but she can often feel them about to begin. They have done an MRI and a spinal tap. They have done an assortment of tests. She has not received the results from the spinal tap, as of yet. The episodes are almost like she is having an asthma attack, but she does not have asthma. She was on medication for ADHD , but has been recently been taken off of it because of the episodes.