The Typical Timeline
Hangover symptoms typically begin 6-8 hours after the last drink, when blood alcohol drops below a certain level. They peak in the morning and gradually improve through the day, with most symptoms resolving within 24 hours for moderate drinking. Heavy drinking can extend symptoms to 36-48 hours.
What Determines Duration
How much you drank
The most obvious factor. More alcohol means more acetaldehyde to clear, more B vitamin depletion, and greater disruption to sleep architecture.
Your liver's capacity
Liver function declines with age and varies by individual genetics. Older people generally experience longer hangover durations because metabolic clearance is slower.
Hydration status
Going to bed dehydrated means the dehydration worsens overnight. Rehydrating before sleep noticeably shortens the dehydration component of the hangover.
Sleep quality
Poor sleep from alcohol disruption means you wake feeling worse and the brain fog component lasts longer. L-theanine support for sleep quality directly reduces hangover duration for this component.
Can You Speed It Up?
Not dramatically — the liver processes alcohol at a fixed rate. But you can meaningfully reduce the severity of the hangover during its course with hydration, food, electrolytes and rest. The bigger intervention is prevention: taking Revive before bed means you start the morning with less of the work left to do rather than starting from scratch.