Table 3.

Adverse events in both groups.

	Opioid-based group	Opioid-sparing group	P values
	(N = 28)	(N = 28)
Adverse events
Nausea and vomiting	2 (7.1%)	2 (7.1%)	1
Dry mouth	0	0	–
Dizziness	2 (7.1%)	1 (3.6%)	0.55
Pruritus or skin rash	3(10.7%)	0	0.24
Constipation	2 (7.1%)	2 (7.1%)	1
Dyspepsia or gastrointestinal bleeding	0	0	–
Cardiovascular events	0	0	–
Urinary retention	0	0	–
Respiratory depression	0	0	–
Sedation or cognitive impairment	1 (3.6%)	0	1
Total events	10	5	0.26