Postoperative Analgesic Effects of Different Doses of Epidural Hydromorphone Coadministered with Ropivacaine after Cesarean Section: A Randomized Controlled Trial

Table 3

Side effects in the 24 hours after surgery.

	Group H0 ()	Group H1 ()	Group H2 ()	Group H3 ()
Nausea	5	5	4	4
Vomiting	2	1	1	1
Antiemetic used	0	0	0	1
Pruritus	0	0	1	4
Respiratory depression	0	0	0	0

Data are presented as the number of patients.