• "Huffing" involves breathing through an inhalant-soaked rag held over or stuffed into the mouth; or Inhaling from balloons filled with nitrous oxide.
• "Sniffing" or "Snorting" implies inhaling vapors from a container.
• "Spraying" implies spraying an aerosol directly into the mouth.
• "Bagging" refers to sniffing or inhaling fumes from substances sprayed or deposited inside a plastic or paper bag.
  

Source: National Institute on Drug Abuse
Research Report Series
Inhalant Abuse
NIH Pub Number: 10-3818
Published: May 1999
Revised: July 2012

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