“…Forty‐four studies assessed the effects of LAOs (oxycodone [N = 13], fentanyl [N = 2], morphine [N = 19], tramadol [N = 8], methadone [N = 0], oxymorphone [N = 8]) [12,15–23,27,29,30,35,36,48–66,68–79], among which were six studies were with ADFs (morphine sulfate and naltrexone hydrochloride ER [N = 6]; oxycodone hydrochloride ER [N = 2]) [29,30,52,53,61,63,64,73]. Twenty‐two studies assessed the effects of SAOs (hydrocodone [N = 1], oxycodone [N = 13], tramadol [N = 7], codeine [N = 0]) [24–26,28,31–34,37–47,67,80,81], of which one study had an ADF as an active treatment (oxycodone hydrochloride controlled‐release [N = 1]) [28].…”