This is my first post, I am new here (signed up Tuesday afternoon, 5 October).
I've used most of the meds you list there. Here is my opinion on each.
Inderal- I had this a long, long time ago. It was mildly effective. I can't say I felt sedated, but I did feel slightly calmer. Would not be among my first choices.
Klonopin (clonazepam) and benzos- Klonopin is one of the better benzos. I've had virtually every one that's in Canada. I find Serax (oxazepam) is fairly potent. I seem to have some kind of natural tolerance to benzos and thus would require a much higher dose than most people, really beyond what could be prescribed. Xanax doesn't even faze me! But IMO I think that benzos would work for the majority of people. Not everyone reacts to the same ones the same though.
Pregabalin- This was a strange one. People said I even spoke calmer on it. It definatly has a calming effect without being too sedating but is very expensive. It's better than gabapentin I believe.
Adderall- Another expensive drug. I have ADD, and this drug was the best I have had for that condition. Possibly boosts self-esteem.
Phenibut- I greatly want to try this one but cannot find a good supplier in Canada. I hear it works well and lasts a long while, the downside being that tolerance builds very quickly so you should only use it 2 times a week. If anybody knows a good Canadian source for this item, please contact me.
Tramadol- I found that I'd have to exceed prescribed amount to get an effect. This is not a drug I would take for anxiety.
Chloral Hydrate. They don't prescribe this much anymore, but personally I find it better than benzos. Anxiety dose is usually 250. Sedative dose is up to 1000. Side effects are mild, usually mild upset stomach. Do not exceed dosage because it will literally knock you out.
Buspar. Useless. It's long term though, not PRN.
GBL/GHB. These might of been an option but can knock you into a temporary comatose state if dose is too high. Both are outlawed now though. Highly addictive.
Phenobarbital. Not very useful.
Kava. I heard this had good anti-anxiety properties but it's hard to get these days. There was reports of possible harm to the liver or something.
Alcohol. I'd just use this socially of course... but too much and it kind of backfires I think.
Anyways, that's my outlook on most substances. I'd really like to try phenibut though. Also some amino acids are thought to be usefull. And I would not resort to an SSRI.