Dialogos

Dr. Petros: GBL is a Substance with Rapid Action and a Deadly Risk

Published January 8, 2026, 14:03
Dr. Petros: GBL is a Substance with Rapid Action and a Deadly Risk

A serious public health risk is highlighted by an incident in Larnaca, where the substance GBL (gamma-butyrolactone) was detected in a water cooler, leading to the death of a 78-year-old man and the hospitalization of four others. Dr. Christos Petros, Associate Professor at the Pharmacy Program of the University of Nicosia, warns of the serious dangers of GBL, which is a substance with rapid action and an extremely narrow safety margin. After ingestion, GBL quickly converts to GHB, a potent central nervous system depressant. The substance causes symptoms such as drowsiness, nausea, and memory loss, but in high doses can lead to coma, convulsions, and death. The elderly are particularly vulnerable due to potential comorbidities and the taking of other medications. Unintentional consumption of the substance dramatically increases the risk.