I threw up at work about a week ago at work outside and ever since then have been in terrible pain. I went to urgent care and they put me on flexeral and that helped alot. But now i found a muscle relaxer i had awhile ago called Zanaflex. I have a high tolerance to pain meds from a long history of abuse. I am hoping to not fall asleep on these because I need to start working again soon. Any ideas to not fall asleep but also not feel drugged, dizzy, or out of it?