Mixing Opioids and GHB / GBL

Mixing Opioids and GHB / GBL is dangerous and should be avoided — TripSit rates this combination “Dangerous.” Low risk never means safe.

The two substances potentiate each other strongly and unpredictably, very rapidly leading to unconsciousness. While unconscious, vomit aspiration is a risk if not placed in the recovery position

Opioids (also known as heroin, fentanyl, oxycodone, morphine, methadone) and GHB / GBL (also known as G).

What to do

• Avoid this combination — the safest choice is not to mix them.
• Keep naloxone (Narcan) within reach. It reverses opioid overdose and is safe to give if you are unsure.
• Start with much less than usual and go slow — you can always take more, never less.
• Never use alone. If you do, call 1-800-484-3731 (Never Use Alone) so someone can send help if you stop responding.

Open the interactive combination checker

Related combinations

• Mixing Opioids and Benzodiazepines
• Mixing Opioids and Alcohol
• Mixing Opioids and Cocaine
• Mixing Opioids and Amphetamines
• Mixing Opioids and MDMA
• Mixing Opioids and Cannabis
• Mixing Opioids and Ketamine
• Mixing Opioids and Tramadol

This is educational information, not medical advice. "Low risk" never means "safe", and the potency of an unregulated supply is unknown.