They probably do have a research on it. The same rescue meds we use are used in hospitals and ambulances as rescue meds for Epilepsy and Non Epilepsy related seizures. They use them more than we do. No way would they not have made sure a rescue med wasn't also a high risk for triggering. That's the real issue. Is it a high risk of triggering a seizure.

I'm pretty sure seizure rescue meds work to stop or lesson a seizure that basically playing out. Where a AED is used to prevent the seizures. AED meds do work similar to rescue meds though as they will also lesson the effect of seizures, but this is really a case by case thing.

Not that I’ve heard . Most seizure recovery meds ( maybe all ) are technically anxiety medication.

The Pharmaceutical probably won’t even allow it , if it was possible. Many AED medicines are very Expensive. They make too much profits on them .