Donna, I take Robaxin with both of those meds. No problem. I just started the Robaxin a few months ago and it has really, really helped me. I hope it does you, too.
I used to take Robaxin back in the 1980's and the very first pill would make me sleepy but, from then on, no side effects at all. So, don't worry if you go to sleep a few minutes after your first dose. You should be fine after that. Maybe that won't even happen for you. We are all so different.
Sherrine