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What do comedowns from GHB/GBL feel like, and how can you feel better?

The effects of GHB and GBL are relatively short-lived compared with other drugs. The peak effects of GBL last for about 1–2 hours but this is slightly longer for GHB, with effects completely wearing off after about 4 hours. GHB and GBL comedowns are generally not severe, and effects usually pass within a day.

Some people report using GHB and GBL to come down off other drugs, like MDMA. The effects of a GHB or GBL comedown from this type of use can be unpredictable.

If you …

Then …

Have trouble sleeping

Feel very hungry

Sweat or feel very hot or very cold

Have trouble concentrating or thinking

Feel agitated or irritable

Feel tired

Have headaches

Have bad dreams or nightmares

Experience low mood

Feel anxious

Feel paranoid

Try these things at home:

  • Get plenty of rest and sleep.
  • Remember to eat and drink plenty of water.
  • Get moving to release feel-good brain chemicals.
  • Reach out and talk with friends and whānau for support.
  • Relax and do things that you enjoy to take your mind off not feeling well.
  • Avoid caffeine, alcohol and other drugs.
  • Practise mindfulness and deep breathing, and try writing down your thoughts and feelings.

Experience ongoing insomnia

Have severe headaches or migraines

Feel severely agitated or irritable

Experience severe anxiety

Experience intense low mood

Have suicidal thoughts

Feel intensely paranoid

Feel severely panicked or have a panic attack

Call a doctor or Healthline (0800 611 116)

They can talk you through the next steps.


Experience psychosis

Attempt suicide

Act violently towards others

Have chest pains

Have trouble breathing

Have a seizure

Lose consciousness

Call 111

These are signs that something more serious is going on. You or the people around you should act quickly.

 The Erowid vault talks about someone’s experience with a high dose of GHB at a festival:

“He had a terrible hangover the next day and claimed that he felt negative after-effects for more than 2 weeks after the event, particularly during the first week, he felt foggy, had difficulty concentrating, and somewhat ‘anhedonous’ meaning he didn’t enjoy anything.”

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