I doubt it. It has been a long time since I have had experience with flexeral. It simply zonks me; I cannot even drive safely. I might build up tolerance over time but YIKES! the journey.
I would imagine that Soma would be the closet comparison. Methocarbamol (Robaxin) is almost useless for me but in the ER they inject it and it is nearly miraculous. :)
My doctor used to prescribe SOMA for me all the time, but I hardly took it as I was still working.