It depends. Sometimes, like with pod tea, they can SUCK. I mean, just really fucking annoying, all over the body, constant fucking histamine itches. I can't stand that shit. Even popping a bunch of benadryls doesnt do much. That's the worst part about pod tea, i need at least promethazine to even get near the stuff.
But, like on heroin, they can still be really annoying. BUT, you're so damn faced that you couldn't give a shit. Scratching them feels really good sometimes, but if it's real good tar, the itches can detract from the nod and I'm like MAANNNN FUCK THIS LET ME NODDD!!!!!!!!!!!!!!!!
On oxycodone, I find it personally makes me itch the least of all opiates. Just little tingly itches that feel really good almost. Never annoying. Haha, actually, alot more concentrated in the groin area for me. I shouldnt do this drug in public, cuz people will think i have crabs. Hydrocodone is similar in this effect, but I find the itching to be significantly more pronounced. Oxycodone feels much more "medicinal" to me, if you will.
On oxymorphone, I've always been WAAYYYY too hypnogogic to care about any itching, so I can't even comment on whether it induces itching much.