The weak opioids used were tramadol, propoxyphene, and codeine and the potent ones were morphine and oxycodone.
Los opioides débiles usados fueron el tramadol, el propoxifeno y la codeína; los potentes fueron la morfina y la oxicodona.
Os opioides fracos usados foram tramadol, propoxifeno e codeína; os potentes foram morfina e oxicodona.