How Can I Tell if Someone Is Abusing Heroin?

Here are some signs that someone might be abusing heroin:

  • People on heroin think slowly and might move slowly.
  • Heroin makes people act sleepy, like they're in a dream.
  • Heroin makes the pupils—the black circles in the center of the eyes—get very small.
  • A person who injects heroin will have marks on the skin where the needle went in.