From: Comparative study on regression time of block and adverse effects of nalbuphine and fentanyl as an adjuvant to intrathecal bupivacaine: a prospective randomized double-blind study
Adverse effect
Group
Incidence
p-value
Nausea & vomiting
N
F
5 (10%)
4 (8%)
0.6400
Pruritus
0
1
0.3194
Bradycardia
2
3
0.6464
Hypotension
4
0.6951
Shivering
0.6186
Respiratory depression