Yeah I am stuck on IV bupe as well... cannot go back to any other ROA, unless I am absolutely forced into it! But usually that doesn't happen.. I have to agree with CruelBri, that plugging is most definitely the next best ROA, and is totally harmless for your body, possibly even being safer than taking it sublingual! I have seen long time sub addicts, who only ever have taken it sublingual since subs were put on the market... they lost teeth, and had horrible tooth decay from the binders/fillers in suboxone and the flavor/coloring is what was the main culprit I believe, with both the strips and the pills.. seriously! its not good on your teeth if you take it a lot for a long time, sublingually.. I guess they prob could have avoided this by simply brushing their teeth more often, which they claimed they did daily.. but I don't believe that..
Anyways, when I have plugged bupe in the past, its truly not far off from how IV bupe feels... has a fast onset, not like IV fast, but still kicks in, and kicks in strong like 5-8 mins at the most, after plugging it... I have always made it into a liquid solution, just like I would prepping it for IV, using only 2mg or less at a time... and the first time I did this, I was amazed by how strong it felt! It truly felt something like a potent full agonist opioid/opiate! Around 4-5 mins after pushing the solution in my bum, I felt this heavy, strong and warm opioid buzz come over me... cant even compare it to anything else I have done.. almost felt like oxycodone and dilaudid mixed together, just not THAT strong.. it lasted longer than IV does for me at least, and had me feeling great all day, from just 2mg plugged...
So, yeah...now that I have a pretty much unlimited needle supply, I just cant help but want to slam it every dose... sublingual is my LEAST favorite ROA to take subs... I hate the taste of pills, even just plain bupe/subutex... its fucking gross, and I hate how I have so much saliva build up in my mouth.. and I also hate not being able to talk to anyone for like 30 mins, as I will not swallow or spit out the bupe before 30 mins, even though it still works if you do it less time, like 10 mins-15 mins... I just had this weird obsession of taking it for no less than 30mins when I sub'l took my bupe.. Sniffing is my next favorite ROA to plugging, out of the 4 I have tried, and really are even possible, besides oral which is useless with bupe.. its also got a fairly fast onset, not as fast as plugging or IV, but not nearly as long as sublingual has, and lasts around the same amount of time plugging it would last... but its not very good for you, so I don't recommend it..
Plugging bupe FTW.. its harmless and works great, with a nice buzz too! If I didn't have a needle addiction, which most definitely IS a real thing, I would surely plug my bupe again...