Ya but your run of the mill ambulance isn't likely to carry that. Just hope they get to you soon and there's an emt who knows how to bag properly til arriving at the hospital. I think it'd be more useful to carry flumazenil, the med for reversing benzos. Though I've seen people take monstrous amounts of naloxone to no effect, so a more potent opiate antagonist isn't a bad idea.
As for the OP's question about an OD of someone with a supposed 30mg+ of Carfentanil tolerance, I would guess no amount of naloxone would be sufficient to save that person should they take enough to OD. BTW, I won't say I don't believe that habit because I guess anything is possible, but you would need to be synthesizing it, getting it really cheap, or have a ton of money to keep up with that habit. May I ask how one's habit progresses from whatever it started as, to needing 1 dose that you could split between between half the junkies on the Lower East Side of Manhattan & have 'em nodding out.
I've always reacted differently to opioids and other drugs than the average person, and I suffer from some very oddball undiagnosed pain disorder that causes pain more intense than most could imagine. I broke my tibia and fibula clean and considered the pain from that to be a 6.5 to a 7. Even when I was first exposed to opioids they had little effect euphoric or painkilling. Perhaps due to pain being too severe or some other reason, but even 4mg IV dilaudid in the hospital only a week after first taking an opioid did nothing... After a month of being in and out of the ER, vomiting 5-10 times a day from pain and averaging 2.5 hours of broken up sleep per day I decided to take things into my own hands.
I managed to get my hands on a bunch of morphine vials made by a pharmacy and at first used intranasally, doses around 100mg to little effect, my blood pressure hardly dropped, I tried this for about a 2 weeks to little avail, so I stopped taking any opiates for 4 weeks to get it all out of my system and tried IVing doses up to 250mg MS to little effect, I only tried for like a week or so than stopped figuring it was pointless. A few months later I got my hands on fentanyl citrate I had it lab tested after I purified it and it was around 98.5% without any toxic impurities. I started low, and slowly worked my way up to large doses (50-250mg), using intranasally only IVing when releif was needed instantly, It worked fairly decent for releif, I found it to not be too sedating/euphoric to prevent me from functioning while reducing my pain enough to function. I never found it euphoric.
When I realized how High my tolerance was going I decided to detox and go opioid free for a month, and it reduced my tolerance a bit, but after a while it just returned to an uneconomic level so I was basically forced to detox about once every 2 months for a 1 month period to get my tolerance to a controllable economical level. At that point I decided to say fuck it ant tried carfentanil as i just wasn't willing to go through that every 2 months, for me detoxing was not unbearable, it was the return of the pain I was suppressing that got me. When off opioids I would have to spend that time in the hospital to manage my blood pressure as the pain would get so bad it would drive my BP up to the danger zone of a stroke and cause severe vomiting.
When I tried carfentanil I basically was in FML mode and decided to up the dose until it was effective. I reached 30mg and didn't need to go above that, normally 15mg is enough to function and only require 30mg for extreme situations. I detox once every so often to ensure I'm in control and that I'm not making things worse by taking opioids. When I detox I go 1-2 months without opioids and am basically bedridden or admitted to the hospital for blood pressure management. I don't find the withdrawal symptoms all that horrible by comparison to the normal pain of daily life. I guess pain is very subjective like when you're a 2 year old a skinned knee or stubbed toe hurts a ton, but once you break a finger stubbing a toe still hurts but it's more of an annoyance than anything...
We can't discuss prices here but carfentanils cheap on the dark net, 30mg is far cheaper than your average H habit. And while it's certainly strong it's no where near the 10,000 times stronger than morphine that's claimed. Of course it's illicit so the purity has to be questioned, plus with multiple vendors offering it I imagine each batch will vary considerably. And I can totally seen how the OP could end up on such a dose, I recently bought 2g of fentanyl thinking along the lines that if it's 100 times the strength of morphine, I got myself 200g of morphine and be set for months. It didn't work out and me and my wife finished it off in under a week, the stuff wasn't the advertised 99% pure but it was fucking strong and we were ridiculously wasted, but you build a tolerance to this stuff fast. Obviously carfentanil is far stronger, but the theory's the same. The stuffs becoming more accessible, so I wouldn't be surprised if you hear more about carfentanil, including some inevitable tragedies.
I had the carfentanil lab tested for purity so I knew what I was putting into my body... Also, fentanyl citrate is about 40-60 times the potency of morphine and fent HCL is closer to 60-75 times the potency of morphine in reality and because of the short half life tolerance builds fast.
Unfortunately Diprenorphine isn't easily accessible to anyone and it isn't in any hospitals AFAIK so if someone does OD the only treatment would be rescue breathing. If someone took pure carfentanil thinking it was heroin or even thinking it was fentanyl it could literally stop their heart and I suppose the only way to start it again would be CPR until it is metabolized or something. If nalaxone fails, I suppose they'd have to fly in some Diprenorphine from a vet or supplier or something...
Someone said I was trolling when I said carfentanil sneezes, but if you've ever snorted something even a liquid, your snot or drainage may still taste like what your insufflated even hours after the fact and considering the potency I wouldn't want to harm anyone inadvertently no matter how low the chance. So, yes carfentanil sneezes sounds funny but I think it could be a real safety issue for those around me.
Oh just something I think I should add is that from my experience, carfentanil usually looks like the normal type of iodized salt you'd find in salt packets, but sometimes the crystals are bigger, carfentanil crystals from what I've seen also tend not to be very shiny. Fentanyl citrate or HCl (can't speak for un-salted fentanyl) from my experience is a fine powder slightly more gritty than talc but a little reflective and very white.
Just something I thought I should mention as I doubt most people have a clue what it looks like.