Mild to moderate dehydration combined with moderate alcohol consumption has no influence on simulated driving performance.

Conclusions: Overall, it appears that dehydration does not exacerbate impairment in driving performance caused by mild-moderate alcohol intoxication. Further research is required to clarify the effects of alcohol and dehydration at various alcohol doses.
PMID: 24867575 [PubMed - in process]

Source: Traffic Injury Prevention - May 31, 2014 Category: Occupational Health Authors: Irwin C, Leveritt M, Shum DH, Desbrow B Tags: Traffic Inj Prev Source Type: research