Yeah, absolutely.
Halcion (triazolam) is an extremely potent, but also extremely short acting triazolobenzodiazepine, active in the hundreds of mcg range, but lasting a few hours at most. Its rarely ever prescribed here now and I do not believe it can be scripted on the NHS, its blacklisted. Whilst I've never had it I do not particularly want to. Its so strong and so potent that even a single dose can in many people cause a rebound, almost like withdrawal although not as severe as true, protracted benzo WD.
But its known for causing a rebound a few hours after a dose that can resemble mild and temporary withdrawal.I might try it once or twice if I got the chance, to explore it, but it really doesn't sound like one I'd be enthusiastic about. I've heard of people mixing it with coke, and insufflating it, but generally it just doesn't seem like a good benzo. To end a panic attack maybe, but generally it sounds kinda crap despite (or indeed quite possibly because of) its extremely potent but extremely short duration of action. DO NOT allow yourself to get physically dependent on these! you'd be in a worse situation than people suffering GBL/GHB withdrawal, having to wake up every couple of hours, to dose round the clock in order to avoid seizures, and tapering with this benzo would be very difficult and impractical.
For sleep, I'd recommended nitrazepam above all the others, or second to that, loprazolam, out of all the benzos available on NHS RX here in the UK. Nitrazepam, is a very long acting, highly hypnotic benzo, and unlike most others, being a nitrobenzodiazepine, its got a lot more euphoric potential others. Loprazolam is a decently long acting hypnotic-anxiolytic benzo of the triazolo type. I'd love to see nitroloprazolam or flunitroloprazolam appear on the grey markets. I've been scripted it once before, took it for a fair while and really quite liked it, for a benzo. Generally benzos don't do it for me, they don't hit that spot that barbiturate binding site or loreclezole/valerian actives binding site agonists, or orthosteric agonists (GABA binding site itself) like muscimol do.
I prefer the 'wall-banger' sort of GABAergic sedative-hypnotic, the old school ones that are mostly not around these days. I really want to try glutethimide in particular, with dihydrocodeine, as well as ethchlorvynol and methaqualone.