TheodoreRoosevelt said:
Chill out. It takes an extremely high amount of heroin to die, tolerance or no tolerance. There have been studies that have shown that it takes upwards 1.8 grams of heroin to overdose to an opiate naive individual (although OD50 is much lower, that was probably an OD10 or something). It only takes like .1-.2g if you're opiate naive to get high. So quite a big margin there.
Overdose is extremely unlikely unless you have a tolerance, where fluctuations in quality have larger margins when you are using larger quantities of substance. If you're not tolerant, a small amount will get you high no matter what.
.
What are you talking about? 1.8 grams BEFORE an OD? 1.8 grams IV is enough to kill anybody, even with the biggest tolerance in the world. .1 or .2 is plenty to get high for someone with no tolerance, you are right. But telling him there is a huge margin between getting high and OD is wrong. For somebody with a tolerance, there is a margin, but it isn't huge. Also, saying it takes an extremely large amount to die is wrong. Somebody who is IVing heroin for the first time and has no tolerance could fall out with a pretty small dose.
To the OP, try about .1 or .2 first, but no more. Wait and see what happens because you can always do more, but not less. Also, 1.8 grams would kill me and i have been slamming heroin for years. This guy posting before me is either crazy or made a few dozen typos.
Also, coke won't work for an OD and neither will cold water. Narcan/Naloxone and those type of drugs are the only thing that will help. The 1st answer was right about that, but that is about it.
Mr. Roosevelt, you are going to get somebody killed telling them it is hard to OD on heroin, especially somebody that has never done it before. You should have your account banned.
P.S. To the OP, don't leave your friend on a stret corner like Theodore said, unless you are a heartless peice of shit. Call 911 and just tell them that he stopped breathing. That way, only the paramedics come, no cops. When they get there, tell them the truth. They will help him and won't call the cops. Get rid of any dope left though (hide it or flush it) just in case the cops do show up. But, ususally, even if they do, they don't fuck with anybody when you call about an OD. I had a friend OD at my apt and the cops came. They just took whatever dope they found and didn't do anything else. If you know CPR, that is a good thing to do until the paramedics arrive.