Earlier I wrote that I wasn't super keen on writing up anything about how to smoke 7-OH, but if it'll keep people from smoking pills I think it may actually be harm reduction.
Smoking pills is super unwise, when I refer to smoking 7-OH I'm referring to an extract that hasn't been cut with jack shit, a lot of "7-OH powders" are cut with malic acid, microcrystalline cellulose, etc., but you need it pure. Other grades of purity should not be vaporized. My first experiments with it involved sandwiching it between layers of flower and testing what it preferred as far as combustion, and it seemed to resemble DMT in that it burns easily and is quite fickle with temperature. A single jet torch very carefully and lightly applied is what worked best there, but then I started dissolving 7-OH into anhydrous ethanol (do not use denatured ethanol for this, do not use vodka, do not use everclear, all are unsuitable) and once the 7-OH is fully dissolved into ethanol which is a pain in the ass to nail but it's not as tricky as benzos, you can lay it onto an even layer of flower.
You could use other smoking material, just make sure it's super evenly ground up. When you lay this, treat it like blotter. By that I mean to pack it as level as possible in a flat dish like you'd use to bake brownies, use an actual level to make sure the dish is not tilted in any one direction (otherwise you'd make hotspots), and make sure to totally dessicate the smoking material once you're done. A dehydrator can help, but a heat gun has a much more delicate touch and leads to a better quality of end product. Once this flower (or other smoking material) is infused, I just roll with it or pack it into blunts. The same way that things like 25E-NBOH, DOB, etc. when applied to blotter are often labeled as such so that they can't be resold as LSD, I would never give out flower that I hadn't somehow indicated as obviously being infused with a potent opioid like this. How is that done safely? I have no fucking clue. I can't figure out a safe way to meaningfully color or demarcate flower in this way, so I dyed the filters of the joints that I rolled with it, the blue tip indicated the presence of 7-OH.
Please avoid smoking things off of foil, holy shit is that reckless to do. That's coming from me too, which is saying something. You absolutely do not want to risk inhaling pyrolysis products from aluminum, you can smoke out of a potato, there's no reason to take a flame to foil.
Even worse to inhale would be the pyrolysis products of pill binder, I'm glad this attempt at smoking a pill didn't work for you. As a teenager ~a decade ago I'd occasionally vaporize 8mg Dilaudid shields or 10mg Ambien tablets, but once I wasn't unironically terminally ill I began to give a shit about longevity.
Mitragyna alkaloids are also soluble in the same bases that vape juice are made out of. Is that more harmful or less than smoking off of cannabis, dagga, lotus, etc.? I have no idea. 7-OH takes a little bit to fully come up and it's pretty brief, but when vaporized the timeframe compacts a ton. So many people develop unbelievably savage addictions towards specifically 7-OH, smoking it is profoundly wasteful relative to eating it. If I was trying to match a 30mg dose every 6 hours orally administered, I'd probably need to smoke 15-20mg every 2 hours, so based on this vague assumption I'm guessing that I would need ~3x as much 7-OH to achieve a similar state, all just to likely make it more harmful by smoking it and making the same amount of 7-OH less last time and get less done. It's a fun thing to experiment with, but 7-OH is kind of a fleeting waste already when eaten, smoking it just makes those negatives even worse. I do not intend on smoking any more 7-OH, it's much more useful to just eat Mitragyna alkaloids as far as I can tell.
I've got some crystal MGM-15 on its way right now, and I'm going to see if that one's any more useful when vaporized, but I still suspect that blotter paper will be the most ideal medium for MGM-15.
Edit: Just saw there were other comments to respond to here.
What solvents any given molecule is soluble in will vary wildly based on the molecule's structure, Mitragyna alks fit well into PG and can be squeezed into ethanol, but they fucking hate water. It's bothersome to work with, but a heat gun, agitation, extreme patience, and an optimally anhydrous environment allows you to pull this off. I've vaporized some rather pure mitragynine, as well as a low potency 50x kratom extract before and both certainly appear to have effects both subjectively and as far as BP/pulse effects. Pupils pin shut, pain fades away, it reminds me of the normal experience of smoking a mu/delta opioid agonist. I never sprinkled 7-OH in a joint, but I did sandwich it in some bowls and that worked but it will not vaporize properly unless you have that shit absolutely as pure as you can get it. Do not smoke pills. Full spectrum 50x kratom extract also could induce immediate and intense vomiting sometimes, reminiscent to doing way too much oxycodone intranasally with too little tolerance. For some reason, cleaner mitragynine and 7-OH did not act similarly.
This isn't super related to the thread's topic, but I've noticed that the more I use psychedelics, the easier of a time I have sleeping/eating on them and it gets to the point of tripping with the intent of pursuing "ayahuasca dreams", "acid munchies", "mushroom workouts", they become more of an experience enhancer when you learn how to nail the dose just right and acclimate to being in that headspace.
Surrounding which solvents are safest to use in long term consumption, I imagine that ethanol would be fine but ideally evaporating as much of it away would be even better I believe. 7-OH is a little weak to fit onto blotter paper but it could be done, MGM-15 however could easily fit onto paper. I'll be running some experiments with that soon, but given how easily dumbasses turn around and sell 25X-NBXX's or DOX's as LSD, I really think that infusing blotter with any opioid (or any non-LSD substance, frankly) would necessitate also manufacturing the paper it's on to be adequately labeled.
The failed juice does work orally, but if you ask anybody who's ever used a LOT of benzo solutions in their life, you'll quickly learn about how toxic PG can be orally if a poor quality of solvent is used. Earlier in this post, I mentioned how I pivoted on this stance because I'd rather people know how to make a clean sample of smoking material instead of smoking pills, I guess I overlooked how far people will go to try to get fucked up on mu/delta opioid agonists. It feels strange to have grown up around heroin trafficking and seen how there was still a culture of self-respect and dignity and integrity in it and how it was consumed, treated with a degree of respect surrounding tolerance and safety, and then after the American withdrawal of military force from West Asia where opium poppies are produced, the fentanyl era kicked in and all of a sudden people treat an entire class of drugs like a ticket to a cheap high instead of being the profoundly useful tool that an opioid truly can be.
