Hi! Adding my 2 cents-worth re: Dilaudid for pain, yes it's an "oldie but goodie" , actually morphine w/o the element that causes nausea. Works well for me, along w/ valuim + Restoril for sleep. I took Zofran for awhile, as even the dilaudid made me a bit queasy, but my body must have adjusted to it, so now the dilaudid alone saves the day.
One anti-nausea that wreaks havoc, both physically & mentally, for me (and maybe some others) is Reglan (metroclopromide). They often give that b4/during/after surgery if you are prone to post-op nausea. It caused severe mental distress, anxiety, restless-ness and I still got sick....so now it's Zofran for all that....when I had my recent PLIF, I had Zofran (4 mg) thru an IV b4/during/after & had no problems. I think it IS available as a generic, b/c doc gave me some to take home & I had it refilled & it cost only the $5 co-pay. So you may want to check into that.
Nausea is the worst, esp when all those muscles/tissues/bones/ etc are hurting too. Stick w/ whatever works for you. You can't heal when you're nauseated!
Good luck--keep us posted!