Hair testing for a 90-day drug use history is only available in Ontario for:
- Amphetamines (including Ecstasy)
- Cocaine
- Marijuana
- Opiates
- Phencyclidine (PCP)
Using FDA-cleared testing reagents. this lab-based test offers the advantages of easy specimen collection and highly accurate results that meet the same reference standards as urine testing. When compared with urine specimen testing, hair testing provides up to 2.5 times the number of positives and a longer detection window. Fast turnaround of results is also available: Negative results are reported within 24 hours of receipt at the laboratory, and positive results are confirmed using gas chromatography/mass spectrometry (GC/MS) or gas chromatography/mass spectrometry/mass spectrometry (GC/MS/MS) within 48 to 72 hours.