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Doctor's Assessment Included

Every result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.

Drug Screening

LSD

An LSD urine test is a qualitative screening that detects the presence of lysergic acid diethylamide (LSD) or its metabolites in urine. LSD is a potent synthetic psychedelic substance that produces effects at very low doses.

What It Measures

This test detects the presence of LSD and its primary metabolite 2-oxo-3-hydroxy-LSD in urine. Due to the extremely low doses at which LSD is active, detection requires highly sensitive analytical methods. The test provides a qualitative result indicating whether LSD or its metabolites are present above the assay cut-off level.

LSD is not included in standard workplace drug screening panels, and specialised immunoassay or mass spectrometry methods are required for reliable detection.

Why It Matters

LSD detection is relevant for clinical toxicology, forensic investigations, and extended drug screening programmes. The substance is active at microgram doses, making detection analytically challenging.

Targeted testing may be requested when LSD use is suspected in clinical or forensic settings where standard drug panels would not identify its presence.

When to Test

Testing may be relevant when LSD use is suspected, as part of extended drug screening panels, or during forensic evaluations. Due to the short detection window, timely sample collection is important.

Consult a healthcare professional for guidance on appropriate testing methods and interpretation of results.

Frequently Asked Questions

How long can LSD be detected in urine?
LSD and its metabolites are generally detectable in urine for approximately 1 to 3 days after use. The very low doses at which LSD is active make it one of the more challenging substances to detect, requiring sensitive analytical methods.
Is LSD detected on standard drug screening panels?
No, LSD is not included in standard workplace drug screening panels such as the 5-panel or 10-panel tests. A specialised, targeted assay is required for reliable detection due to the extremely low concentrations of LSD and its metabolites in biological samples.
What should I expect from an LSD urine test?
The test involves providing a urine sample, which is analysed using highly sensitive methods for LSD and its metabolites. Results are qualitative. Due to the analytical complexity, confirmatory testing using liquid chromatography-mass spectrometry is typically employed.

Test Products

This marker is included in the following test panels.