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Is my child using ketamine? The signs & how to tell

What are the signs that your child might be using ketamine? Learn about the physical and behavioural changes to look out for, including bladder symptoms, and when to speak to a GP.

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No single sign proves ketamine use, and many signs overlap with ordinary teenage life. Look for patterns and changes, and trust your instincts.

Physical signs

  • Going to the toilet much more often, including at night, or complaining of pain when weeing
  • Blood in the toilet or underwear, or wetting accidents
  • Stomach pains or cramps with no clear cause
  • Runny or sore nose, nosebleeds
  • Glazed or unfocused eyes, slurred speech, clumsiness or seeming “spaced out”
  • Unexplained bruises or injuries they don’t remember getting

Changes in mood and behavior

  • Memory lapses and difficulty concentrating
  • Low mood, anxiety, irritability or flat emotions
  • Falling grades, missing school or college
  • Losing interest in hobbies, sport or old friends
  • New friends they are vague about, more secrecy, more time alone in their room
  • Needing more money, or money and valuables going missing

Things you might find

  • Small plastic bags with white or brown powder residue
  • Keys, bank cards or small spoons with powder on them
  • Rolled-up banknotes or cut straws
  • Small mirrors or flat surfaces with powder traces
  • Messages or slang such as “K”, “ket”, “bump” or “wonky”

Bladder symptoms are a red flag. If a teenager is suddenly using the toilet far more often or has pain when weeing, ketamine should be considered, even if a GP suggests an infection. Ask your GP directly about ketamine-related bladder damage.

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