Symptoms of overdose can vary depending on the substance. However, the most common symptoms of overdose are:

  • Erratic behavior and abrupt mood swings
  • Loss of consciousness
  • Nausea and vomiting
  • Loss of sensation and movement in limbs
  • Hallucinations and/or delusions
  • Trouble breathing
  • An overly fast or slow heartbeat
  • Seizures
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