Heroin is diacetylmorphine. It is considered a pro-drug (i.e. It sets the stage...) for morphine. Once heroin hits the brain it is converted into morphine, 6-monoacetylmorphine, and 3-MAM. Other drugs that contain morphine as a metabolite are morphine and codeine. 6-MAM is a metabolite unique to heroin and if it's in your urine, it's indisputed that that was the drug used. However, 6-MAM only remains for about 24 hours whereas morphine will remain for 2-4 days. This can only be determined by a specific test called GC/MS but this type of test is employed for pre-employment drug screenings. Tests used by courts or for hometesting, like dipsticks, will just reveal it as "opiate" which could mean codeine, morphine, heroin, hydrocodone, oxycodone, hydromorphone, oxymorphone, nicomorphine/codeine, dihydromorphine, 6-MAM, plain old opium, and possibly fentanyl, methadone, and meperidine among others that your opiate receptors respond to. Also, Mythbusters proved that just two poppy seed bagels will cause a positive opiate test (as they contain enough morphine and codeine to put you just over the threshhold). So with the dipstick test, maybe you had a couple of bagels... Or maybe you're mainlining heroin.
Heroin shows up as an opiate.. God don't you people answering these questions know anything?!
It shows up as morphine. Heroin converts into morphine after being in the body for a couple minutes.
That's what a drug test does!
Because there are chemicals that are in heroin.