Table 2.

Summary of drug and pain types included in systematic review.

Classes	Drug types	Studies (number, %)	Participants (number, %)
Opioids 32 (26.89%)	Oxycodone	4 (3.36%)	643 (3.63%)
	Fentanyl	4 (3.36%)	185 (1.04%)
	Methadone	1 (0.84%)	40 (0.23%)
	Morphine	9 (7.56%)	750 (4.24%)
	Buprenorphine	2 (1.68%)	659 (3.72%)
	Codeine	1 (0.84%)	58 (0.33%)
	Other Opioids	11 (9.24%)	3183 (17.97%)
Nonopioids	Naloxone	8 (6.72%)	1084 (6.12%)
	Gabapentin	8 (6.72%)	610 (3.44%)
	Lidocaine	10 (8.4%)	1036 (5.85%)
	Ketamine	5 (4.2%)	449 (2.54%)
	Amitriptyline	3 (2.52%)	342 (1.93%)
	Bupivacaine	4 (3.36%)	409 (2.31%)