From: Roadside opioid testing of drivers using oral fluid: the case of a country with a zero tolerance law, Spain
6-AM
Codeine
Methadone
(n = 26)
(n = 16)
(n = 14)
%
Cocaine
100
87.5
78.6
Amphetamines
7.7
18.5
21.4
THC
34.6
31.2
35.7
Benzodiazepines, zolpidem and zopiclone
15.4
28.6
Alcohol
14.3