EtG analysis in hair is a useful tool for assessing fitness to drive in suspected drinking drivers; compared to CDT values it provides a direct and unequivocal marker for reliable abstinence monitoring over a period of several months, depending on the length of the hair.

The overall result of the computer test battery showed no objective adverse impact of melatonin on driving performance. However, due to the increased subjective sleepiness after administration of this hormone, caution should be exercised when driving under the influence of melatonin.

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