This link from Childbirth.org gives us what the PDR says about Nubain in labor:
The most frequent adverse reaction in 1066 patients treated with NUBAIN is sedation 381(36%).
Less frequent reactions are: sweaty/clammy 99(9%), nausea/vomiting 68(6%), dizziness/vertigo 58(5%), dry mouth 44(4%), and headache 27(3%). Other adverse reactions which may occur (reported incidence of 1% or less) are: CNS EFFECTS Nervousness, depression, restlessness, crying, euphoria, floating, hostility, unusual dreams, confusion, faintness, hallucinations, dysphoria, feeling of heaviness, numbness, tingling, unreality. The incidence of psychotomimetic effects, such as unreality, depersonalization, delusions, dysphoria and hallucinations has been shown to be less than that which occurs with pentazocine.
My client was loopy and it was not a good situation. The other women in the room (nurses, midwives, etc) who had Nubain in their labors ALL felt like that as well. Other doulas have concurred, they see the unpleasant out-of-control hallucinations, dreams, confusion, etc., more often than not.
Any input, kids? If you've had Nubain, what was your experience? If you're a childbirth professional, what have you observed?