How long will heroin last in your system?

Answer 1

Heroin itself, will come up in a urine test 3 to 4 days after using. The metabolytes of heroin will be there for a long time and can be detected several weeks later.
It takes 30 days to get out of your urine, But one year to get out of your blood.

Answer 2

According to the users height and weight heroin can last up to eight hours,typically it'll last two - four hours.

Answer 3

i have heard the first 3-4 days u are sick than just really depressed for about 10 more days than u start to feel normal again

Answer 4

it can affect you in as little as ten seconds if you put it in a needle. smoking it or sniffing it up you nose takes a little longer, usually one to two minutes

Answer 5

Depends on many things obviously. If you take a sufficient dose your first time i would say three hours.

Answer 6

up to a hour.