Which of the following is a common effect of excessive alcohol consumption?

A hangover is a well-documented consequence of excessive alcohol consumption. It typically manifests after the body has metabolized the alcohol, leading to dehydration, electrolyte imbalances, and the buildup of toxic byproducts. Symptoms of a hangover can include headache, fatigue, nausea, and sensitivity to light and sound, which can significantly impair an individual's ability to function effectively.

In contrast, the other options do not accurately represent the effects of excessive drinking. For instance, individuals are unlikely to experience increased energy or enhanced coordination, as alcohol generally depresses the nervous system, leading to fatigue and impaired motor skills. Additionally, judgment is impaired rather than improved under the influence of alcohol; this can lead to poor decision-making and risk-taking behavior. Understanding these effects is crucial, especially for military personnel who need to maintain peak physical and mental performance.