Adverse outcome

Paracetamol group

(n = 130)

TENS group

(n = 130)

Pethidine group (n = 130)

p-value*

Nausea (n, %)

23 (17.7%)

16 (12.3%)

34 (26.2%)

0.016 (S)

Vomiting (n, %)

11 (8.5%)

4 (3.1%)

20 (15.4%)

0.002 (S)

Respiratory depression (n, %)

0 (0%)

0 (0%)

3 (2.3%)

0.49 (NS)