You might just have to find out the hard way.
But, if you would like to educate yourself, read some articles on GHB toxicity and the resulting health implications.
Medical and legal confusion surrounding gamma-hydroxybutyrate (GHB) and its precursors gamma-butyrolactone (GBL) and 1,4-butanediol (1,4BD) -- Wood et al. 101 (1): 23 -- QJM
GHB-Related Ambulance Attendances In Melbourne ('Party Drug' Gamma-Hydroxybutyrate), Australia
EXPERIENCES OF GAMMA HYDROXYBUTYRATE (GHB) INGESTION: A FOCUS GROUP STUDY
Suspected GHB Overdoses in the Emergency Department | Journal of Analytical Toxicology
Erowid GHB Vault : Journal Article #25
But, if you would like to educate yourself, read some articles on GHB toxicity and the resulting health implications.
Medical and legal confusion surrounding gamma-hydroxybutyrate (GHB) and its precursors gamma-butyrolactone (GBL) and 1,4-butanediol (1,4BD) -- Wood et al. 101 (1): 23 -- QJM
GHB-Related Ambulance Attendances In Melbourne ('Party Drug' Gamma-Hydroxybutyrate), Australia
EXPERIENCES OF GAMMA HYDROXYBUTYRATE (GHB) INGESTION: A FOCUS GROUP STUDY
Suspected GHB Overdoses in the Emergency Department | Journal of Analytical Toxicology
Erowid GHB Vault : Journal Article #25