Detoxing in the hospital you would have been given phenobarbital. I understand this to be a relatively weak barbiturate.
Phenibut has been used clinically in the former Soviet Union for anxiety and sleep; I've read that they gave it to cosmonauts as well although I'm unsure if it was the more common HCL form.
As to it being natural or a supplement;
I'm not a chemistry guy, not at all, but it's an amino acid and a GABA analogue. I don't believe it's found in nature if that's what you're asking, but it can be easily found on google in less than a minute.
I just got a script for alprazolam, and even though I prefer clonazepam and I know we'll get there, I'm elated; having benzos around again, after ten years of not having them, is so good.
I wasn't in the hospital, but technically I was in a detox setting under doctor care. It was the only time I'd ever been given Pheno, and that shit can get you FUUUUUUCKED up if you're not tolerant to gaba agonists.
I think I've seen phenibut online in reseaech chem markets but can't say for sure. My guess is being its a gaba agonist, that solves the anxiety issues and being an amino a od as well likely provides some much needed amino acid to the muscles in the legs at high enough doses to trick them into thinking you just ran a marathon. That's just me throwing shit and hoping it sticks though, o couldn't say for sure why it works or of it would work for everyone but I'm glad it gets you through when you need it.
As for you're new script, I'm happy for you. It's really hard to get docs to give us scripts as addicts and we're often treated as med seekers (which we are, even if we're seeking them for a legitimate purpose they're meant to be used for) which results in multiple attempts to have you try anything pff label instead of an actual fuckin benzo for anxiety. It can be frustrating.
I too prefer clonazepam/klonopin to alprazolam/Xanax. MY psych initially had me on Valium 5mg 3x daily, but I always took extras and ran out early and leaned on my mom's klonopin stashes she'd save for me when I inevitably ran out early since she never took her shit..
What I ended up doing was telling my doctor that the Valium was giving Mr side effects, mainly extreme mood swings, which to some extent was true. The withdrawal definitely made me go into insane spirals of madness and blind rage on occasion. I asked him of it were possible to swotch to Kpins since they seemed to work better for me in the past and not have the same effect and he instantly switched me and upped my dose to exactly what I asked to be given, so that was nice.
If I were in your shoes, I'd schedule a follow up asap and tell the doctor this; "the Xanax works great when I'm having full on panic attacks but doesn't help me with my general anxiety throughout the day as a whole. Can you put me on Klonopin for generalized anxiety and give me a smaller dose of the Xanax for breakthrough anxiety/panic attacks? I get it if you're worried about combining the two meds but the Xanax by itself isn't controlling my anxiety and I feel like I'm counting the minutes until my next dose..."
Now, that may or may not work depending on your doctor's relationship with you and his prescribing practices but my psych and I have developed a good rapport and I'm very honest woth him about my history of addiction. I recently got a short term script on top of my klonopin for Ativan/lorazepam from him. It's all in how you approach it. If it seems like you're not open to trying any other medication besides benzos, they are less likely to give you what you actually want. In my experience doctors are now often underprescribing due to the prescription drug epidemic in the US and fear of losing their licenses and practice or want to try evened under the sign that is used off label as an anxiety med before giving you an actual narcotic anxiety med like a benzo, which is honestly rodoculous considering its only a schedule IV substance. It's a give and take with these fuckers and you almost have to play dumb to get them to give you what you want, as long as they think they're the one who made the decision to prescribe that specific med, you typically have to steer them towards the right script, but you'll get it.
DEAR Mods; I'm sorry in advance if this sort of conversation isn't allowed. I just made an account after years of being a lurker and I'm not up to date on all the rules as I've been away a while. For example, I remember back in the day people addressed themselves as SWIM for safety reasons and now that appears to be a dead practice. So sorry Ina dance if I can't give advice on how to get scripts, I just wanna help..