30 milligrams

To put that into perspective, the average lethal dose of heroin is 30 milligrams compared to that of fentanyl, which is just 3 milligrams.

from 200mg to 500mg

Depending on the purity of the heroin and the users tolerance, a lethal dose of heroin may range from 200mg to 500mg, but tolerant long term addicts have survived doses of 1800mg and over.

between 75 and 375 milligrams

For example, a lethal dose of morphine is considered to be over 200 milligrams, and a lethal dose of heroin is between 75 and 375 milligrams.

3 milligrams

Just 3 milligrams is enough to kill an adult, versus 30 milligrams of heroin.

as little as two milligrams

heroin can take as little as two milligrams to kill an unsuspecting user with no tolerance.

about 3 milligrams of fentanyl

If an adult can overdose on 30 milligrams of heroin, heroin takes only 3 milligrams of fentanyl.

from 30 mg to 500 mg in those who have built up a tolerance for the substance

The estimated lethal dose of heroin ranges from 30 mg in an uninitiated adult user to 500 mg in those who have built up a tolerance for the substance, although there is indication that an uninitiated adult user with no opiate tolerance can, in rare circumstances, suffer a fatal overdose on as little as 15 milligrams of heroin.

375mg

A lethal dose of morphine is over 200mg, and a lethal dose of heroin ranges anywhere from 75mg to 375mg.

approximately 30 mg—10 times the weight of the fatal dose of fentanyl

The accepted average fatal dose of heroin is approximately 30 mg—10 times the weight of the fatal dose of fentanyl.

150mg

In fact, 150mg of heroin of high degree of purity would be lethal.

Depending on the purity of the heroin and tolerance the users

Depending on the purity of the heroin and the users tolerance, a lethal dose of heroin may range from 200mg to 500mg, but tolerant long term addicts have survived doses of 1800mg and over.

about 30 mg, which is 10 times fentanyl’s lethal amount

A 3 mg dose of fentanyl is deadly, but a lethal dose of heroin may be about 30 mg, which is 10 times fentanyl’s lethal amount.

only about 2mg of fentanyl

Typically, heroin takes only about 2mg of fentanyl to kill a human.

One hundred grams of heroin

One hundred grams of heroin is the equivalent of approximately 4,000 individual doses of heroin.

around 30mg for most adults

A lethal dose of heroin is around 30mg for most adults, whereas a mere 3mg of Fentanyl would be fatal.

about 75 to 100 milligrams of heroin

Heroin comes in varying degrees of purity, but Heroin usually takes about 75 to 100 milligrams of heroin to kill most people.

approximately 200 milligrams, 100 times that of fentanyl

In contrast, the average lethal dose for heroin is approximately 200 milligrams, 100 times that of fentanyl.

100 mg

For a heavy user, a lethal dose of pure heroin could exceed 100 mg (in reality, regular heroin users consume an average of 300 to 500 mg per day of “street” heroin, which has been cut with relatively innocuous agents like quinine or caffeine so that the final purity averages around 25%).

the equivalent of about 28,000 to 40,000 individual doses

That amount of heroin is the equivalent of about 28,000 to 40,000 individual doses.

500 roentgens

To kill a human, a dose of 500 roentgens within a few hours is sufficient.