what is the order of the strongest pain killers from greatest to least
There is no true way to do this. There are different classifications of drugs and many within the same classification are similar in strength and it is a matter of opinion on which ones are stronger. As a general rule, you can go by their controlled substance classification. CII's tend to be the stronger ones, like Morphine, oxycontin/oxycodone, oxymorphone, hydromorphone methadone and fentanyl. CII's have the highest abuse potential, CIII's are next strongest. This includes drugs like Tylenol with codeine, hydrocodone, propoxyphene (which is no longer on the US market). CI's are illicit drugs or drugs with no medical uses.
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