lcohol can have various biological and behavioral effects on the body. People who consume alcohol to intoxication often experience what is known as a hangover. Hangovers result in unpleasant physical and mental symptoms including fatigue, headache, dizziness, and vertigo. While there are some suggested treatments to curb the effects of hangover, the best way to prevent a hangover from occurring is not to consume alcohol. Since the effects of most hangovers subside after 8 to 24 hours, time is the most effective remedy for alcohol hangover symptoms.