It was just my subjective assessment based on my many years of opioid abuse (massive in volume and variety), but upon some research, it looks like my estimate was actually a pretty good one:
The above are equianalgesic assessments in animal studies, which pretty closely mirror my assessment. Based on this, 500mg of tianeptine has equianalgesic effect to 83mg of morphine, and oxycodone has around 1 to 1.5 the analgesic effect of morphine (immediate release). So my assessment seems fairly accurate.
It can be backed up in a sense (see above). Also, note that I was referring to tianeptine sodium, not tianeptine sulfate (which is very different in effect to tianeptine sodium, particularly in its narcotic effect -- which is far less pronounced). Also worth noting that tianeptine sodium itself seemed to go down in synthesis/batch quality after 2018. I only had great quality tianeptine sodium from one highly reputable vendor, but they (wisely) stopped selling it in 2017.
(wasn't implying they were different because that of course wouldn't make any sense -- remember we weren't talking about mechanism of action, we were talking about subjective effects). But not only is there a significant potency between tianeptine sodium and sulfate, time to peak plasma occurs more rapidly with the sodium, greatly changing its perceived effects (especially the narcotic aspects). This difference is perhaps most notable with tianeptine than many other substances.
