Combination
Mixing Fentanyl and GHB / GBL
OpioidDepressant
- Fentanyl also called
- fent, fentanil, carfentanil, nitazene, nitazenes
- GHB / GBL also called
- ghb, gbl, liquid ecstasy
Verdict
Dangerous
Two substances with almost no margin between a working dose and an unrousable one, acting on different receptors so neither ceiling helps. Naloxone will reverse the fentanyl half and do nothing for the GHB half.
Risk / Physical
The risk here is to the body — breathing, heart, temperature or organs. Set limits before you start, because this kind of harm does not announce itself in time to react.
Can you mix Fentanyl and GHB / GBL?
High risk of death or life-changing injury. Do not combine.
- Fentanyl
- Synthetic — potent by micrograms, unevenly mixed
- Presence of kratom in opioid overdose deaths (fentanyl co-detection rising 33% to 62%, 2018-2022). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10806006/
- Buprenorphine-Precipitated Withdrawal Among Hospitalized Patients Using Fentanyl. https://pmc.ncbi.nlm.nih.gov/articles/PMC11437388/
Checking more than two?
Combinations of three or more carry risks that no pair-by-pair chart can show. The checker rates every pair at once and flags the whole-mix ones on top.
Open this in the checkerRelated combinations
All combinations →Rated dangerous. Educational information only, not medical advice. Absence of a documented interaction is not evidence of safety.