If you are taking some prescription medications, or are really addicted to poppy seed bagels[ two or more a day] you may get a false positive.
Also, Heroin is an opioid, Hydrocodone, Oxycodone and Codeine are also opioid, so if you took any of these, that would make you test positive also. Had the same thing happen to me when i was scripted Oxycodone and forgot to tell them at the Hospital.
Heroin crack...
heroin
the body metabolises heroin and Oxycontin in different ways. On a standard drug panel test it will light up for opiates if you have taken them, but if you take a complex blood test then they can distinguish which drug you have taken because heroin gets metabolised and leaves one metabolised form of heroin than Oxycontin does not when metabolised.
A drug which is illegal. Examples would include cannabis, cocaine and heroin.
In the UK, heroin is a class A drug.
Heroin is an opiate.
No, Methadone will not hide heroin on a drug test.
If you mean would bleach remove heroin from a urine sample the short answer is no heroin is a drug not a bacteria or virus if bleach was added to urine it would definitely not take the heroin out of the urine if it were present.
Heroin is a narcotic drug, not a demon.
Either heroin, or cocaine.
Heroin
heroin is a semi-synthetic drug, ive just done about it in my drugs and toxicology module at uni