Alcohol withdrawal symptoms range from mild anxiety and headaches to life-threatening seizures and delirium, depending on how heavily and how long you’ve been drinking. Symptoms typically begin within 6 to 12 hours after your last drink, peak between 24 and 72 hours, and follow a fairly predictable progression. Understanding that progression helps you recognize what’s happening and how serious it is.
Early Symptoms: 6 to 24 Hours
The first signs of withdrawal usually show up 6 to 12 hours after your last drink. These early symptoms are often mild enough that people mistake them for a bad hangover or general anxiety. They include headache, mild anxiety, insomnia, nausea, sweating, and hand tremors. Your heart rate may be elevated, and you might feel generally restless or on edge.
These symptoms happen because your nervous system is rebounding. Alcohol enhances the brain’s main calming chemical (GABA) while suppressing its main excitatory chemical (glutamate). With regular heavy drinking, your brain adjusts to alcohol’s constant presence by dialing down its own calming signals and ramping up excitatory ones. When you suddenly stop drinking, that compensatory wiring is exposed. The result is a nervous system stuck in overdrive, which is why withdrawal feels like the opposite of being drunk: instead of relaxation, you get anxiety; instead of sedation, you get insomnia and tremors.
Moderate Symptoms: 12 to 48 Hours
As withdrawal deepens, symptoms intensify. Between 12 and 48 hours after your last drink, you may experience more pronounced versions of the early symptoms along with new ones: heavy sweating that comes in waves, significant nausea or vomiting, visible tremors, increased agitation, and difficulty concentrating. Blood pressure and heart rate often climb noticeably during this window.
Hallucinations can appear within 24 hours of your last drink. A condition called alcoholic hallucinosis causes vivid auditory hallucinations, sometimes visual ones, while you remain relatively alert and aware of your surroundings. This is distinct from the more dangerous delirium tremens (covered below), where confusion and disorientation are defining features. With alcoholic hallucinosis, you may hear voices or sounds that aren’t there, but you generally still know who and where you are.
Seizures
Withdrawal seizures are one of the most dangerous complications. They typically occur 12 to 48 hours after your last drink, with the highest risk falling in the 24 to 48 hour window. These are generalized tonic-clonic seizures, meaning full-body convulsions, and they can strike without any warning symptoms beforehand.
Among people who have one withdrawal seizure, about 60% will have additional seizures if untreated, though the span between first and last seizure is usually less than 6 hours. Only about 3% develop status epilepticus, a prolonged seizure that constitutes a medical emergency. Roughly 30 to 40% of people who experience withdrawal seizures go on to develop delirium tremens, which is the most severe form of withdrawal.
Delirium Tremens
Delirium tremens (DTs) is the most dangerous stage of alcohol withdrawal, typically appearing 48 to 72 hours after the last drink. It affects a minority of people going through withdrawal, but it is a medical emergency. With treatment, the survival rate is about 95%. Without treatment, the risk of death rises significantly.
The hallmark symptoms of DTs include:
- Severe confusion and disorientation. People with DTs often have little awareness of where they are or what’s happening around them.
- Intense tremors, especially in the hands.
- Hallucinations, often visual. People may see things that aren’t there and fully believe they’re real, unlike alcoholic hallucinosis where some insight is preserved.
- Rapid heart rate and unstable blood pressure.
- Agitation and combativeness, sometimes severe enough that patients become a danger to themselves or others.
- Heavy sweating, fever, nausea, and vomiting.
The key difference between DTs and earlier withdrawal stages is the depth of confusion. Someone experiencing DTs isn’t just anxious or shaky. Their senses aren’t processing the world correctly, and they may not recognize familiar people or understand that they’re in a hospital. This level of withdrawal always requires medical supervision.
What Makes Withdrawal More Severe
Not everyone who stops drinking will experience the full spectrum of symptoms. Several factors influence severity. The most significant are how much you’ve been drinking, how long you’ve been drinking heavily, and whether you’ve gone through withdrawal before. Each episode of withdrawal can sensitize the brain, making subsequent episodes worse, a phenomenon sometimes called “kindling.”
Other factors that increase risk include older age, poor nutritional status, having other medical conditions, and drinking on top of other sedative substances. People who have previously experienced withdrawal seizures or DTs are at considerably higher risk of experiencing them again.
How Symptoms Are Monitored
In medical settings, healthcare providers use a standardized scoring tool called the CIWA-Ar to track withdrawal severity. It measures 10 specific symptoms: agitation, anxiety, auditory disturbances, mental cloudiness, headache, nausea and vomiting, sweating, tactile disturbances (like itching, burning, or numbness), tremor, and visual disturbances. Each category is scored on a scale, and the total determines whether withdrawal is mild, moderate, or severe, and how aggressively it needs to be treated.
If you’re withdrawing at home and notice worsening tremors, a racing heart, confusion, visual disturbances, or anything that feels like a seizure, those are signs that medical intervention is needed urgently. Mild withdrawal can sometimes be managed in outpatient settings, but moderate to severe withdrawal is safest to navigate with medical support.
Symptoms That Linger for Weeks or Months
For some people, withdrawal doesn’t fully resolve within the first week. A cluster of lingering symptoms known as post-acute withdrawal syndrome (PAWS) can persist for weeks, months, or in some cases over a year after quitting. These symptoms are primarily psychological and mood-related: anxiety, irritability, sleep disruption, difficulty concentrating, low energy, and mood swings.
PAWS symptoms tend to fluctuate rather than remain constant. You might feel fine for several days, then hit a stretch where sleep is disrupted and anxiety spikes. This pattern can be discouraging, especially if you expected to feel better quickly, but it does resolve over time for most people. Knowing that these waves are a recognized part of recovery, not a sign of failure or a new problem, can make them easier to weather.