GHB vs GBL Explained

Gamma-hydroxybutyric acid (GHB) and gamma-butyrolactone (GBL) are two closely linked depressant drugs, but they differ in legal status and risk profile. Both can lead to sudden unconsciousness, slowed breathing, and coma, with alcohol making the danger worse.

GHB, GBL, and Why the Risk is So Close

GHB and GBL are two drugs that are frequently confused or grouped together—even though one is a step in the other's manufacture. GBL is a chemical precursor that, once ingested, metabolizes into GHB in the body. The difference between the two is well-defined by law: According to the DEA, GBL is a List I chemical, while a prescription GHB product is Schedule III. Meanwhile, 1,4-butanediol is not a controlled substance under federal drug laws, but if intended for human consumption, it is treated as a controlled substance analogue under federal law, like GBL.

What Overdose Looks Like

GHB and GBL are known for their effects as central nervous system depressants. Intoxication can cause unconsciousness, slowed heart rate, and breathing distress. An altered state of consciousness comes with a reduced gag reflex, nausea, and ataxia (loss of balance and coordination). Sudden seizures, hypothermia, and vomiting are other signs. The DEA warns that the effects of both drugs can include greatly slowed breathing, highly lowered body temperature, and even coma or death. The fatal effects of GHB and GBL can also include seizures, overly slowed breathing, and high risk of aspiration; and StatPearls says the classic presentation is a sudden onset of coma followed by an abrupt awakening within several hours.

What To Do in an Emergency

The speed at which both drugs can affect the central nervous system is hard to overstate. As a result, anyone who takes GHB or GBL must avoid driving, or doing anything that requires coordination or clear consciousness. Even more crucially, watch for someone who is unresponsive, has blue lips, isn’t breathing right, has seizures, or loses consciousness.