Signs of drug use (substance abuse)

You may notice many physical or emotional changes in someone who is using drugs. Common changes include:

  • Red eyes, sore throat, dry cough, and fatigue (in the absence of allergies).
  • Changes in sleeping or eating habits.
  • Moodiness, hostility, or abusive behavior.
  • Lying and having poor family relationships.
  • Work or school problems, poor attendance.
  • Loss of interest in favorite activities.
  • Social withdrawal or changes in friends.
  • Problems with the law, such as arrests for stealing, driving under the influence (DUI), or driving while impaired (DWI).
  • Decreased interest in sex.

Last Updated: January 14, 2010

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