Australian Standard Drug Class Screening Cut-off Levels (Australian Standard AS/NZS 4308:2023 (Urine) and AS/NZS 4760:2019 (Oral Fluid) cut-off levels are usually derived from levels which can be reliably detected in a laboratory.
Australian Standard Drug Class Screening cut-off levels may take other factors into account, such as the cut-off level for cannabis metabolites which makes allowance for passive smoking (it is set at a level that ensures a positive result cannot be obtained from passive smoking).
AS/NZS 4308:2023 (Urine) is replacing the standard AS/NZS 4308:2008 with a three year transition period.
The drug screening cut-off levels per drug class for urine testing – AS/NZS 4308:2023
- Amphetamine Type Stimulants (250 ug/L)
- Benzodiazepines (200 ug/L)
- Cannabis Metabolites (50 ug/L)
- Cocaine Metabolites (150 ug/L)
- Opiates (300 ug/L)
AS/NZS 4760:2019 (Oral Fluid)
The drug screening cut-off levels per drug class for oral fluid testing – AS/NZS 4760:2019
- Opiates (50 ng/mL)
- Amphetamine Type Stimulants (50 ng/mL)
- Benzodiazepines (10 ng/mL) *
- Cannabis (THC) (15 ng/mL)
- Cocaine (50 ng/mL)
- Methamphetamine (50 ng/mL)
- Oxycodone (40 ng/mL) *
* Testing is optional for BZO & OXY based on workplaces specific testing requirements or policies.
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