I would wait an hour before re-dosing. It is one of the longest times to peak out of all the opiates I have done. As for the HCL, it just means it's a salt of an acid, as opposed to a base. Pretty much all the opiates say HCL at the end, as does heroin #4, although #2 is a base form making it better for smoking.
You can always just use the methadone to detox. It works very well for a short 4 day detox, and I know you have often said that you don't need drugs for pain, it's more of a habit for you.
Personally I would give it a bit longer than an hour. I have an extremely fast metabolism & oral meds usually hit me fast.
Regardless methadone usually doesn't kick in good for 2 hours or so & begin to peak till 3-4 hours.
As such I usually recommend waiting 4 hours before redosing. My experiences with others seems to confirm this.
I believe John is aware of the long half life & the dangers involved with that so I won't get into that unless asked.
Now as to whether or not it will hold you it will vary person to person. I find methadone to be very effective as such.
For example not to long ago I switched from wearing 100mcg/hr Fent patches for 4-5 months + IV'ing on top of it to methadone.
I was able to transition from wearing said patch to 30mg of methadone & taper my dose of it very quickly with no w/d's to speak of.
Another example would be when I was doing a good amount of Oxymorphone. I would usually IV 35-50mg per shot.
I was able to hold myself with very minor w/d's with as little as 50-60mg of methadone.
This really speaks volumes to methadone's w/d covering efficiency as Oxymorphone w/d's are brutal.
Though I believe this was partly due to a very low cross tolerance as I had little methadone experience at the time.
I have more now obviously. If your worried about withdrawal's methadone covers them with surprisingly low doses.
Just a note of caution the doses I'm referring to are extremely high. Please do not take them as guidelines or encouragement.
The Oxymorphone/Fent & such that is, the methadone doses are reasonable.
However, with methadone one must always be careful & know the risks involved but that's enough content for a different thread.
Seeing as your referring to Dilaudid I have a bit less experience with that & have never been fully dependent on it.
I've mostly just used it for one off rushes on occasion, but my experience with everything else should equate.
The few times I did do Dilaudid I'd usually IV 20-24mg per shot for a good rush but sadly little to no high.
I was able to hold the w/d's from a day's session of the above at bay with 40mg of methadone & likely could have used much less.
I'm basing a lot of what I say off my prior knowledge of your posts. As IIRC I've read quite a few posts regarding your usage.
I wanted to point out that alternative ROA's with Methadone are relatively pointless as far as I know.
I've never known anyone to have success with them & Methadone has a high oral B/A.
Also due to various properties of Methadone it more saturates one's system than anything else & as such doesn't pack a rush.
I hope that information helps a bit & may help to alleviate any concerns you have regarding w/d's.
As for dosing that's a bit more questionable. 1 large dose seems to work well for alleviating w/d's.
However for pain management dosing is usually spread out to 3 or 4 times daily.
This is because although methadone has a long half-life it's analgesic actions do not last as long as the half-life.
From my experience & the literature seems to agree the analgesic actions seem to last around 6-8 hours.
I wish you the best of luck John & hope that things work out satisfactorily for you.