I'll first restate what the rest of the guys said.
Barbs have an EXTREMELY steep dose-response curve, even more so than GHB, I would think, to illustrate just how dangerous they are.
Your usage pattern as described, is abusive, you are using them, like you said, as a coping mechanism. Getting high is all well and good, sure, can lead to addiction, if users aren't careful and responsible, but when drugs of any sort are used to help skip over a problem issue in life, that is when people run a very, very high chance of being dependent.
I've been there, with barbs no less, in my case, veronal was my barb of choice, I'm autistic, and have some sensory issues, overloading basically, where there is little natural crap-filter, so to speak, to block out all the useless background 'noise' thats around. I'm glad I am, in fact I would hate to have been born without, but before I found a med that suits as well as does the one I'm on now (tizanidine, little or no unwanted side effects, and several side effects that deal with completely unrelated stuff, such as back pain and crappy sleep in the bargain) I went through a phase several years ago of using various GABAergics for the overload stuff.
Never was much of a drinker, I still am not (although I do drink, just not particularly heavily), but used a bloody ton of various other things, unfortunately, at one time, barbs became one of them. I did something similar to what you described, and got hold of a bulk amount of powder, lab grade barbital, as the free acid. Got to a stage when I was doing grams a day, and then came the inevitable crash. That came within a femtometer of killing me after I ODed. some fuckwit paramedic narked me up for possession too, the prick. Got raided and remanded for 8 months or so after they found a completely unrelated lab setup (no, not that sort of lab, just general purpose biochemistry and o-chem stuff)
Lost the lot
Started withdrawing during the hearing, or just before, didn't know what was going on at the time really, and went into a fully psychotic, severe DTs state while in transit. Don't know how long that lasted for, I don't remember much of it, which is probably a very good thing, but the shitty low, low dose of benzos (chlordiazepoxide of all things, which is THE most useless benzo I have ever known, short of oxazepam, which I actually find quite unpleasant) is absolutely useless for treating barb WD, its like trying to capture a wild elephant, only to find you ran out of etorphine, and trying to slip it a couple of 8/500 co-codamol in a banana instead. My best guess, based on keeping track of time as best I could, which was awfully, was a month, maybe slightly more, of being delirious and completely fucking out of it.
Lost so much weight then, didn't know that there was food being put in with me, (if you can call it food, its nothing of the sort inside) that when I came around properly, I looked like a concentration camp prisoner.
As far as IVing goes, aside from the fact that it is a bad idea and could result in your corpse being found with the needle still in its arm, and thats without drinking, there is one important thing to bear in mind with barbs. The Na salts are pretty basic, and will burn if you miss a shot and result in potentially quite severe, and certainly painful tissue necrosis.
As high as god....yes, but not impossibly, because you went to meet him.
