This is the worst thread in the history of bluelight - why even bring up naloxone, amphetamine, etc... the person in question took over a gram of an antihistamine and is likely tripping his balls off, which a hospital could monitor, maybe provide a small dose of benzodiazipine to help the person sleep it off. 911 would have been the call initially. Taking that much hydroxyzine sounds more like a suicidie attempt than someone trying to get high.
Please DO NOT ADMINISTER STIMULANTS TO SOME ONE WHO IS UNCONSCIOUS!!!! The evidence you provide that you have reversed your own OD with amphetamine is obviously incorrect, as if you are awake enough to insufflate amphetamine you are not in danger of dying shortly thereafter. The only thing besides naloxone that would help an opiate OD is buprenorphine, which has stronger affinity than even naloxone, but is only a partial agonist.
PLEASE mods do something about this thread. Anyone who thinks cocaine doesn't "mass-flood your brain with dopamine like meth" obviously does not hold the capacity for providing advice in these situations. COTN I suggest you lurk on these threads for ~ a year and do a shitload of research before making asinine statements as you apparently are want to do - If you have questions, ask them, but do not pretend to think you know anything when you believe opioids induce "a permanent state of sleep", it is periphneral effects that cause ODs buy paralyzing your respiratory system, often causing arrythmias, which would be exacerbated by amphetamine, which is why so many more people OD on the combination than opioids alone (look it up, in a real epidemiological journal, not some newspaper article).
My guess is you haven't graduated highchool and are trying to contend your information is valid even when members with advanced degrees and years of experience on here are trying to educate you otherwise...
Ignorance is excusable... stupidity is not.