Drug class and cutoff concentrations, Roche cobas chemistry analyzers:
Amphetamines/Methamphetamines (500 ng/mL),
Barbiturates (200 ng/mL),
Benzodiazepines (100 ng/mL),
Buprenorphine (10 ng/mL),
Cocaine metabolite (150 ng/mL),
Fentanyl (5 ng/mL),
Methadone (300 ng/mL),
Opiates (300 ng/mL),
Synthetic Opioids (100 ng/mL),
Cannabinoids (50 ng/mL)

Screen results above these thresholds are preliminary and are always sent for confirmation testing.

Reflexed to confirmation