Phenergan and HBO therapy..

I was recently told by one of our PACU nurses that I should not give IV Phenergan to patients going for HBO therapy because the HBO unit would not take these patients. Further inquiry led to the HBO unit believing that in the unit, Phenergan lowers the seizure threshold and thus will deny patients immediately after surgery. I am having a hard time finding any info on the internet about this. Perhaps it is just the medical director's belief...I dunno.

Thanks for your help.