Toxicities

# of patients/598

% of total patients

Nausea

427

71.4

Pruritus

280

46.8

Respiratory depression

14

2.3

Post-dural puncture headache

6

1.0

Requiring blood patch

4

Hypotension

Preoperative

11

1.8

Intraoperative

69

11.5

Postoperative

40

6.7

Urinary retention (of 535 patients)

20

3.7