Really... if you were awake, aware, and alert after sedation, and your respirations weren't depressed at all, there's no way they'd foresee the seizure activity, regardless of how long you were asleep (unconscious). Prolonged sedation isn't something they worry about too much- it's when your respirations slow down that concerns them. Now granted, 10 hours is a long time, but it's not unreasonable by any means... it just means that it took your body a long time to metabolize it and filter it out.
Also, the language thing happens... it doesn't mean much of anything other than certain parts of your brain had awoken and others hadn't. People are sent home from dental surgery still drugged out of their minds all the time. I don't think an hour waiting period is anything to care about.
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