Suspected GHB overdoses in the emergency department

Area of Science:

• Toxicology
• Emergency Medicine
• Clinical Chemistry

Background:

• Gamma-hydroxybutyrate (GHB) is a central nervous system depressant with a history of recreational use, often associated with overdose scenarios.
• Accurate identification of GHB in overdose cases is crucial for appropriate patient management and public health surveillance.
• Emergency departments frequently encounter patients with altered mental status and signs of intoxication, necessitating rapid and precise diagnostic capabilities.

Observation:

• A 12-month study in Washington State analyzed 146 suspected GHB overdose cases presenting to an emergency department.
• Blood GHB was confirmed in 54 patients (approximately one-third), with concentrations ranging from 29 to 490 mg/L.
• Co-administered drugs, including ethanol, 3,4-methylenedioxymethamphetamine, marijuana, methamphetamine, cocaine, and citalopram, were detected in 67% of confirmed GHB cases.

Findings:

• Confirmed GHB overdose patients (N=54) were predominantly male (83%), with a median age of 28 years.
• Clinical presentations included vomiting, ataxia, respiratory depression, unconsciousness, and altered consciousness.
• Notably, 92 of 146 suspected cases lacked confirmed GHB, indicating significant diagnostic overlap with other overdose types.

Implications:

• The frequent co-administration of GHB with other substances complicates clinical presentation and diagnosis.
• The indistinguishable symptoms between GHB and other overdoses highlight the need for advanced toxicological screening in emergency settings.
• This study underscores the challenges in identifying GHB toxicity, potentially leading to underdiagnosis and impacting treatment strategies.