Can I Safely Cut My Lorazepam In Half To Use As An Emergency Medication For My Epilepsy?

Hi. My Neuro prescribed me 20mg of Lorazepam to help with my epilepsy. I also have a Vagus Nerve Stimulator Implant that controls a vast majority of them. I typically have 1 a year. The magnet I swipe across my VNS device almost always pushes the aura I m having a way. I save these as an emergency med on a particularly bad (rare) seizures. Or if I m having one of my off feeling days. That s normal for epileptics to have. We won t always have seizures on these off feeling days. So an emergency med is a good way to nip the seizure in the bud before it even occurs. My question for you is this. I m a first year teacher in kindergarten this year. Can I cut these 20mg Ativans in half to take if I need the in the classroom? I feel like the full pill would make me sleepy. Although I ll take sleepy over it continuing on into a seizure because I only took half a pill. Does that makes sense? I m 31f. Epilepsy aside I m a healthy person.