Definitely use the alprazolam at night if you aren't sleeping. If you were dependent on the alprazolam prior to this, it would be better finding a longer acting benzodiazepine to use for a couple days if not simply a non-gabaergic drug.
Not sleeping makes the process infinitely more difficult (as you are finding I'm sure). The insomnia related to acute withdrawal can drag on for longer than other symptoms, especially if you have been using for a long time. Ideally you would be able to take a non-gabaergic sleep medication like trazadone or a gabaergic drug like gabapentin, pregabalin or baclofen (which acts slightly differently than benzos).
Do you have a doctor you can work with to address your insomnia?
I am referring to the possibly well thought out idea of using suboxone or subutex to help with detoxing followed by "can it be skinpopped?" Its like saying, "I like high colonics so let me go get the firehose."
No, I don't think you're being a douche, I'm just being critical for other reasons. I'm not sure it is appropriate to characterize a decision like that as a well thought out idea. By it's very nature, that kind of thought process is that arrives at the conclusion that it is a good idea to inject a maintenance medication probably has not involved the deepest investigation or thought on the part of the user. Instead I see it as more a visceral reaction based in long standing thought/habit patterns to the immense pain they are experiencing (whether psychological or otherwise, suffering is suffering) transitioning from a lifestyle where they are using something like oxycodone or heroin to manage their mood to, essentially, nothing.
It's like how no one just decides to wake up one day and inject drugs without generally having a damn good reason (living with intense physical or psychological pain unknown to those who don't feel the need to regulate their mood with powerful substance, considering how inherently painful lifestyle involved in chronic injection drug/opioid use tends to be). No one just decides to up and inject their ORT medication without a pretty damn good reason, however unsustainable or unhealthy it might be.
Injecting buprenorphine isn't exactly the biggest step forward from injecting other opioids, but in early recovery I'm more concerned with moving the person forward however they can. It isn't unfair to say that injecting buprenorphine (while hardly a good idea), is a bit less harmful than injecting something like heroin (for a number of reasons). Faaaaar from ideal, but with harm reduction we try to meet people wherever they're at without judgement or criticism.
Which is why I love HR - we aren't big on coercive forms of treatment that aren't in line with the user's actual goals. Perhaps what the individual using buprenorpine "improperly" indicates is that they are yet to really formulate practical, achievable goals vis a vis their recovery. Allowing them to figure out their own path and giving them the time and support to do this, and keeping them alive during the process (i.e. away from the dope scene) is what is important for them in specific.