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Laboratory Medicine

Test Catalogue

Gamma Hydroxybutyrate, Urine (GHB, Scoop, Liquid Ecstacy)

Test name

Gamma Hydroxybutyrate, Urine (GHB, Scoop, Liquid Ecstacy)

Urine sample Specimen Type / Requirements

Container Type = Small orange cap container

Minimum Volume = 5mL urine

Specimen Handling

Collection instructions: Collect random urine in a small orange cap container Within 4 to 12 hours of suspected ingestion. Indicate date and time of Collection.

Special Instructions Peak urine GHB concentrations are observed within about 4 hours after an oral dose, but the drug is undetectable in urine by 12 hours.

Transportation: Send sample to core lab ASAP

Sample Rejection Criteria Urine collected with acid/alkaline or leaking specimen will be rejected

Required Documentation

Turnaround Time (TAT)


Test Utilization

Reference Value

Therapeutic Range

/ Not detected

Critical Values

/Not detected: < 50 mg/L

Detected: > 50 mg/L

Test Code




Testing Location

Referred Out – ON, Canada (ROSK01)

Other Information

Last Updated: October 13, 2020