Prevalence of opioid adverse events in chronic non-malignant pain: systematic review of randomised trials of oral opioids

Table 2 Opioids used in trials of non-malignant pain of different aetiology

	Condition^a
Drug	Arthritis	Musculoskeletal	Neuropathic	Mixed	All conditions
Codeine	51	46			97
Codeine + paracetamol	173	233		156	562
Dihydrocodeine	119				119
Dextropropoxyphene	129	56			185
Dextropropoxyphene + paracetamol	496				496
Morphine	222	61	59	49	391
Meptazinol		31			31
Oxycodone		47	50		97
Pentazocine	76				76
Tramadol	363	778	110	401	1652
Tramadol + paracetamol	197	309			506
Total	1826	1561	219	606	4212

ISSN: 1478-6362