I'm assuming the poster has already dosed his shit, but I feel compelled to give my experience on the matter although I only have experience freebasing it (albeit I've heard the addiction to freebase dosing is very comparable to IV dosing if not moreso because of the fiend-y nature of it)...
The first few times I did it, I didn't feel a whole lot, but about the 5th time is when I bought the shit on my own and smoked it by myself and when I got spun off on the shit...
During this experience I smoked about 3/4 of a gram to myself in an 8-hour period...
I headed down to the motel palace inn to meet the chick I got it from...She had just re-upped on her blue bell and gave me the best two looking shards out of the bag as it was my first time buying it from her...She asked me if I would give her a ride down to the gas station to make an exchange, and she would throw a fat bowl in her pipe and smoke it down with me...I agreed...why not, right? lol...
She threw in probably 3-4 points and smoked it down with me...and when we got back from the gas station, I threw in some of mine to return the favor...we smoked this down, and by this point, I was fucking flying...She received another call and asked me the same question as before to which I agreed again...We got back from the second exchange and she threw in another quarter...most of the two bowls she just let me blow down (hence my estimated dose)...After this I went to my house gettered out of my fucking mind and blew down the rest of it...at one point, I went to walk into my house to grab a drink...I was trying my hardest to walk, but couldn't, NOT run...and the trip into the house looked like it did on the fast and the furious when they used nitrous...everything was tracing and blurry, everything had a smokey quality to it, and I was experiencing the strongest euphoria I had ever felt in my entire life even to this day...pure bliss...enough to make your scrot tingle...
After I smoked it all, I spent a couple hours trying to get every little resin hit out of the bowl and stem possible...heated up my lighter so much that when I accidentally pressed it up to my face I had a huge red A from the imprint of the lighter that stayed under my lip for 2 weeks...
While I was smoking it, it felt so great, just dosing more and more, but when I was done, I had realized I had done way too much as it was one of the most uncomfortable "highs" I had ever had (other than dosing 32 CCC's in high school virtually brand new to the drug)...Was tweaking way too hard, got paranoid as fuck, severe anxiety to the point of nearly having a panic attack, and then the comedown was SO horrible lmao...
Spent the next year off and on chasing the high, but just getting paranoid as fuck to the point that I thought one of my best friends from high school was an undercover agent, and had been the entire time I had known him (lmfao...crazy right?), rollercoastering in weight from 200 to 155lbs (In the Feb before I started fucking with it I weighed 230 lbs, and by the next Jan had gotten down to the 155 mark...
Utterly a year of hell for me...lost 4 different jobs in that span of time due to addiction/sickness from lowered immune system and I'm pretty sure part of the reason I started having chronic pain was from binge starvation and working 12, 13 hour shifts at the same time...It gets to where you only want to spend 2-3 days on a binge, but end up going 4-5 or even a week because of having to go to work/not being able to get to sleep at night so you dose just to make it through the day...
It's gotten to a point these days that if I want to, I can go binge 2-3 days (sleeping and eating while smoking), put it down and be fine...maybe fiend for a day or two, but that's it...but back then (about 3 years ago), it was the hardest thing I had ever done to stop doing it...the only thing I've found harder to quit is cigarettes (but that probably has to do with the fact I can get a pack for 4.50 and don't have to hunt them down lol)...
If you're seriously thinking about IVing do-do....consider listening to Voodoo by Godsmack (the only decent song by them lmao)...it basically describes the addiction...