^IVing salvinorin A is not reported to be that different than smoking, just like IVing DMT is not that much different than smoking (though IVing is reportedly a lot less painful if you find the smoke harsh).
IMing salvinorin A, on the other hand, seems extraordinarily justified to me as a potential means of experiencing yet unrevealed attributes of consciousness. And maybe now I have a means (thanks for the info, OP!). I've tried IMing it before, with DMSO. I didn't feel anything. I was using just a milligram of salvinorin A, so it was hard to even see if it dissolved (though it should have) The reason I think it's potentially so valuable is because using IM would presumably be slower in its onset than smoking (which often results in a confusing experience), but much faster than sublingual (which often results in non-breakthrough experiences).
IMing may be a way to reach the "breakthrough" visionary salvia state in a way where it is possible to "watch the doors of perception open" to the beyond, rather than shatter them as we careen through as during smoking. Typically, with smoking, the onset is so rapid that you simply find yourself in the thrall of the state, barely aware of how you reached that point.
The most valuable aspect of the salvia experience, to my mind, is observing how sober consensus reality reassembles on the return. Why does the recognition of your identity, knowledge that you took a drug, and the time and place in which you are, return to consciousness in the way and in the order that it does for you? How does it return to you, and how might finding that answer refine your perspective on the nature of perception? The return is a way to peak under the hood, to observe and analyze the nature of your self reforming in real time from a perspective unique to the world of mind altering substances.
However, there is no way (at least for me, as sublingual doesn't work well for me) to watch the reality of the self disassemble during entry into the visionary state (because it happens so quickly when smoking). Perhaps, if we could slow down the onset and really feel our world crumbling -- feel where in the foundation of consciousness the fissure is formed and how and where the first blocks fall, enter the visionary state, and slowly return -- then integrate the narrative of the "descent" and "ascent" into and out of salvia space it would reveal something invaluable about the structure of our individual consciousnesses.
It's difficult for me to imagine a more compelling reason to IM inject any other drug. I'm aware of no such reports with salvia, either.
My plan has always been to IM it while on DXM or ketamine, as combining with dissociatives maximizes the lucidity of the salvia experience without really altering the more interesting content.
