Photo of heroin©istock.com/Bestfotostudio

Heroin is a white or brown powder or a black, sticky goo. It can be mixed with water and injected with a needle. Heroin can also be smoked or snorted up the nose.

Heroin can cause a rush of good feelings just after it's taken. But some people throw up or itch after taking it. For the next several hours you may want to sleep, and your heart rate and breathing can slow down. Then the drug wears off and you may feel a strong urge to take more. 

Some slang names for heroin are:

  • Smack
  • Junk
  • H
  • Black tar
  • Horse