Oh no...what a topic....
Heroin Withdrawal...I have to say from personal experience, this one is the worst. I kicked a $50 a day habit once quite suddenly when I locked myself in my grandparents house on a whim after being fed up with daily struggles and dodging police...What followed was the longest and worst 12 days of my entire life. Text-book definition of Hell. It was a true nightmare...
Shoulder and arm and chest tension, stomach cramps leaving me doubled over on the floor beside the toilet crying so hard, trying to scream but no sound was able to escape my throat, sitting on the toilet shitting explosive bloody painful diarrhea while holding my head over a trash can puking up bile and dry-heaving because I can't keep down any food or water...honestly it hurt to chew and swallow food or drink anything...Lying in bed on a matress soaked in sweat and piss tossing and turning and bouncing and screaming and trying to get comfortable...skin crawling and goose-bumps and chills and hot flashes...cold sweats...legs feel like they're rotting off...back aches like the 7th circle of Hell...I was delirious as well in some parts of it...seeing the ghost of my dead father sitting beside my bed of agony and smiling and laughing at me is not a pleasant sight...horrible horrible. Death is your only saviour.
Honestly if I had had a fire-arm in the house I would've blown my brains out by the 4th day...but no it went on for nearly 12 days...I was getting myself back around the 8th day but it was a slow process and I was finally able to leave the house on the 12th day. I've never felt any pain that could ever compare to that awful mess of inhumanity. God just thinking about it makes me shiver and feel uneasy. And the fucked up part (even more fucked up part, I guess) is that this was only the FIRST time that I kicked...I went back to the shit and kicked all over again 5 or 6 times. The pain was not as bad in the times that followed the first one because my habits weren't nearly as bad that first cold turkey. My god what was I thinking...Thats what that shit does to you...its awful.
Next would be Fentanyl...a near and dear friend of my was prescribed the 75ug patches by Croaker at the Hospital (the only doctor in the city that could legally prescribe these things, he was handing out prescriptions like a motherfucker) He got a box of about 25 patches a month for something like 35 bucks (he had medicare insurance)...we were mixing the gel in water and shooting the shit getting high as fuck. Needless to say my close friend is now dead

( )(I still cry thinking about him). His habit really got out of control with this shit to the point where 30 bucks worth of high quality heroin wouldn't do anything to him...he could be deathly ill and do a quarter gram or maybe more of heroin and wouldn't even feel a slight bit better...it was sad...I got into it myself but that only lasted for a month and then I kicked (that was about the 3rd time I kicked) but it was still quite brutal. My friend Brian died shortly after that of an OD...it was a combination of Heroin, fentanyl, and cocaine...the speedball to end all speedballs. But thing is is that that was a normal shot to him...he needed that much power in his shot to get thru the next 12 hours. Sad sad sad.

Maybe it was best that way because the withdrawal from that would be catastrophic in the worst since of the world...probably would've killed him anyway....
Bupe is easy...
Hydrocodone and codiene are easy...a walk in the park compared to those above.
No experience withdrawing from Oxy's...we just used those to substitute for heroin when it wasn't available...actually Oxy's are a waste of money. The street price of an 80mg is higher than a good bag of smack and is not as powerfull...why in the fuck would any one do that shit...financially it makes no sense. You're wasting precious dollars that you can't afford to lose when you're a junkie...Oh well...I don't care anymore these days so whatever.
Heroin is the worst that I have experienced...so there...sorry about the rant and long post....