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Another text book example of an ignorant pot head who'll believe marijuana isn't bad because all the cool kids are smoking it, yet accept the other bullshit people say about other drugs. No doubt drugs can ruin your life, if not used properly and the same goes for cannabis.
Now if you don't like or use other drugs all the power to you, but all drugs deserve respect as it is respect that prevents abuse.
Opium comes from poppies, Papaver Somniferum, the latex resulted from scratching the pods is rich in morphine, codeine, thebaine and papaverine. These are all opiates and among the best pain killers known to man.
Smoked opium will likely sedate you and put you in a floaty dream world. It takes repeated smoking sessions for several days in a row to develop any addiction to opium and the current availability and value of opium makes this even more difficult.
Heroin is made by extracting the morphine from opium and reacting it with acetic anhydride, the chemical name for the resulting substance is diacetylmorphine.
The addition of the two acetyl groups make it easier for heroin to cross the blood brain barrier, it is then broken down to morphine again in the brain.
Even heroin requires up to two weeks of consecutive use before physical addiction manifests.