Mixing GHB / GBL and Mephedrone (meow)
Caution
Each hides the other; whichever wears off first can leave you overdosed on the other. Both strain the heart. Take less of each than usual, and do not use alone.
Both can dull each other's effects, so if one wears off before the other it's possible to overdose due to the lack of counteraction. Both substances affect the heart and may lead to further dangerous heart complications at higher dosages. Additionally, the combination may increase the negative side effects of each other.
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.
Headspace vs physical riskCan you mix GHB / GBL and Mephedrone (meow)?
MixSafe rates mixing GHB / GBL and Mephedrone as "Caution" — carries risk that is worth understanding before combining. Reduce doses and do not use alone. Source: TripSit drug combination chart, retrieved 2026-08-20. Educational information, not medical advice.
- GHB / GBL also called
- ghb, gbl, liquid ecstasy, 1,4-butanediol, bdo, 1,4-bd
- Mephedrone also called
- 4-mmc, 4mmc, meow, m-cat, 4-methylmethcathinone, bath salts
TripSit drug combination chart, retrieved 2026-08-20. View the dataset.
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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 caution. Educational information only, not medical advice. Absence of a documented interaction is not evidence of safety.