Psychoactive substances

What to expect if you stop using drugs, common withdrawal symptoms, and where to get help for a drug use problem or in an emergency.

Where can I get help?

For confidential information, advice and support if you are concerned about your drug use please call the:

You can find out more about the range of help options available, including online resources, treatment options in the community or live-in, service providers and support groups in the section or look in the hospital page in the front of your phone book:

When to get immediate help

Go to the nearest hospital Emergency Department (call 111 if you can’t get someone to hospital) if a person shows any of the following symptoms after using psychoactive substances:

  • difficulty breathing
  • feeling cut off from the world
  • chest pain
  • racing heart rate
  • difficult to rouse or wake
  • lowered consciousness
  • shaking and twitching
  • rapid eyeball movement
  • nonstop vomiting
  • extreme anxiety and panic
  • fainting
  • loss of speech and eyesight
  • paranoia
  • loss of contact with reality
  • seizures.

What can I expect if I stop using?

If you have been using psychoactive substances regularly and you stop, you are likely to experience withdrawal (also known as detox). Withdrawal can cause symptoms that could last for several weeks or even months.

Most people can cope with mild withdrawal by knowing what to expect, taking extra care of themselves (such as resting and drinking water) and possibly using natural remedies to help with sleep and agitation. Most people will complete withdrawal with mild to moderate symptoms.

Common withdrawal symptoms

  • Restlessness
  • Irritability
  • Agitation
  • Sleep problems
  • Low mood
  • Heavy sweating
  • Anxiety
  • Headaches
  • Low energy
  • Poor concentration
  • Mood swings
  • Vomiting
  • Diarrhoea
  • Aches and pains
  • Nausea
  • Low appetite
  • Craving drugs

For more information about how to look after yourself or somebody else in withdrawal see: Managing your own withdrawal on

More extreme withdrawal symptoms

  • Extreme panic and anxiety
  • Depression
  • Hallucinations
  • Paranoia
  • Racing heart
  • Anger
  • Suicidal thoughts
  • Ongoing diarrhoea and vomiting
  • Aggression and violence
  • Confusion and memory problems

These symptoms can be very distressing and risky for people to try and manage by themselves. Addiction services are able to help people manage these symptoms and support them through.

If you have concerns about withdrawal symptoms contact your doctor or local hospital. If you think a person experiencing withdrawal is having suicidal thoughts or they have a history of feeling suicidal or low mood, ring the mental health crisis service at your local hospital.

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