coolioni7 the only reason you said Oxycontin is the best substitute is because the stupid government/news stations that love calling Oxycontin "Synthetic" heroin anytime anything involving the drug is mentioned. Which is bullshit.
It it not synthetic and it is not heroin. It's derived from Thebaine and heroin is a completely different chemical.
OxyCODONE which is the actual chemical is not the best substitute to heroin at all.
It is very differen't in terms of likeness.
Closer relatives do exist.
Heroin is diacetylmorphine hcl, which means it is one or 2 molecules away from morphine.
heroin is rapidly metabolized to 6-acetylmorphine in the body.
So by far the closest thing to heroin is morphine, hands down.
Then other's that are differen't but are somewhat like heroin are hydromorphone (Dilaudid), fentanyl, oxycodone(Oxycontin & Perc, and pethidine/meperidine (Demerol).
Some prefer one over the other.
It depends on personal pref. and ROA.
I have hear that Dilaudid or Hydromorphone is very good when IV'd some people prefer it over heroin and say it's better.
I'm sure oxymorphone is up there with it.
So in order for you to truly find the best substitute for Heroin you would have to try heroin, dilaudid, fent, oxymorph., oxycodone, morphine, meperidine and so on and compare them yourself.
That would be you're best bet.
Maybe not your cup of tea but I hope I've helped a little.
But definitely, codeine, hydrocodone, pod tea, opium, kratom are not the best substitutes for heroin. Not even close.
You decide.
Peace,
-Akomplice