Drug use by truck drivers in Brazil

In Brazil, those who are suspected of driving under the influence of drugs are tested only for ethanol. Professional drivers, especially truck drivers, use stimulant drugs to prevent sleeping during long-distance driving. Surveys on the patterns of use of illicit drugs in the workplace have rarely been conducted in Brazil, in spite of the high costs and the potential risk to public health. Since 1996, the authors have been compiling the results of tests, performed in their laboratories, for drugs in urine samples from truck drivers. The drugs analyzed were: amphetamine, methamphetamine, cannabinoids and cocaine. Urine samples (728) were collected in three out of the five geographical regions of Brazil: southeast (517 samples), northeast (161 samples) and south (50 samples). Fluorescence polarization immunoassay and capillary gas chromatography/mass spectrometry were utilized for the urinalyses. The results obtained were as follows: 41 samples (5.63% of the total) tested positive for the drugs being studied. The frequency of positivity of samples was quite similar for the three regions: 6% in the south, 6% in the southeast and 4.35% in the northeast. However, distribution of the drugs in the samples showed regional variations. Results such as those that we have obtained can provide an estimation of the extent of drug use by truck drivers in Brazil.