Burroughs wrote in his book Junk "If God made anything better he kept it for himself" in regard to the effect you get from a good I.V. dose of Heroin, I'd like to add "If God made anything more itchy he gave it to Satan for use in Hell"
I've not had to get out the Steak Knife to scratch with in months, today I've kept the Knife within a few cm grasp to deal with the itch.
I wish I knew chemistry well and could grasp WHY you itch so much on good smack, on paper imo you would think a high dose of good pregab would also make you itchy like this but it doesn't.
I know DXO / DXM has the same itchy effects BUT to me it's not nice and more like a burning itch which is highly unpleasant and equal to a form of torture, DXO / DXM is actually a very potent opiate and is in the same chemical family as Morphine / opiates which is why it is used to treat coughs.
I was asked a while ago if taking DXM would benefit someone who's in opiate withdrawal, my reply was "do you think adding petrol to a fire would help?"
Doing DXO / DXM while sick in my view would be horrific and is equal in the level of insanity for someone to smoke potent Salvia while in the peak experience of a 170mg MDA experience.
I still miss those MDA pills that were around in the late 1990's that were pressed up as Purple Elephants and the White with purple flakes Pepsi logo pills.
I'm still to this day a huge fan of good heroin when on a MDA comedown, the only issue was being able to see clearly so you could run / chase the heroin smoke as it's kinda hard when you can see 3 totally separate lumps of heroin on the foil. I learned how to run smack with 1 eye closed so it stopped the fucked up visual effects though I admit it took me several attempts to master this ability.