Why Detection Windows Matter

​

Different testing methods detect recent or historical drug use over different time frames:

​

• Saliva (Oral Fluid) – detects very recent use and impairment, typically within hours.

• Urine – detects past use and is the most common method in AS/NZS 4308-compliant workplace testing.

• Blood – detects very recent use, generally used in incidents or confirmatory testing.

• Hair – provides a long-term 90-day history, often used in more specialised situations.​

​

Knowing these windows helps businesses choose the right type of test for their policy, industry and risk profile.