Alcohol hangovers occur when blood alcohol concentrations (BAC) return to zero. The event is characterized by pounding headache, sensitivity to lights and loud noises, dizziness, drowsiness, nausea, vomiting, dry mouth, sweating, concentration problems, hyper-excitability, and anxiety and/or depression. The biology of hangovers is complex and surprisingly, has not been well-researched. Dehydration and sleep deprivation may …
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