Delirium Tremens (DTs): Symptoms, Timeline & Why It's a Medical Emergency

‍Quick answer: Delirium tremens (DTs) is the most severe form of alcohol withdrawal. It usually starts 48 to 96 hours after the last drink and causes sudden confusion, hallucinations, shaking, fever, sweating and a racing heart. DTs is a medical emergency: without treatment it can be fatal, but with prompt hospital care most people recover.

If someone is confused, hallucinating, having a seizure or has a high fever after stopping drinking, call 911 right away. Do not wait to see if it passes.

This guide explains what DTs is, how to spot it early, who is most at risk and how medically supervised withdrawal can prevent it.

What Is Delirium Tremens?

Delirium tremens, also called DTs or alcohol withdrawal delirium, is a sudden and severe disturbance of the brain and nervous system. It happens when someone who has been drinking heavily for a long time suddenly stops or sharply cuts back.

Most people who stop drinking have only mild withdrawal. According to StatPearls, about 3% to 5% of people going through alcohol withdrawal develop DTs. Over a lifetime, the risk among people with alcohol use disorder is about 5% to 10%.

Why DTs Happens

Alcohol slows the brain down. It boosts GABA, the brain's main calming chemical, and blocks glutamate, its main excitatory chemical. With months or years of heavy drinking, the brain adjusts by turning down GABA and turning up glutamate to stay balanced.

When alcohol is suddenly removed, those adjustments are left unchecked. The brain and nervous system go into overdrive, which causes the shaking, racing heart, high blood pressure, agitation and confusion of DTs. To learn more about how long-term drinking changes the brain, see What Alcoholism Does to the Brain.

How Dangerous Is DTs?

Without treatment, DTs can be fatal in up to 37% of cases. With early treatment, the death rate drops to under 5% (StatPearls). That gap is why fast emergency care matters so much.

Symptoms of Delirium Tremens

The hallmark of DTs is sudden, severe confusion that comes and goes, along with signs that the body's "fight or flight" system is in overdrive. According to MedlinePlus, symptoms include:

Mental Symptoms

• Severe confusion and disorientation (not knowing where they are, the date or who people are)
• Hallucinations, often seeing or feeling things that aren't there, such as insects on the skin
• Agitation, fear, paranoia or sudden mood swings
• Bursts of energy followed by deep sleep lasting a day or longer
• Extreme sensitivity to light, sound or touch

Physical Symptoms

• Severe shaking (tremors)
• Heavy sweating
• Fever
• Rapid heartbeat and high blood pressure
• Seizures
• Nausea, vomiting and chest or stomach pain

DTs vs. Regular Alcohol Withdrawal

Mild withdrawal can cause shakiness, anxiety, sweating, headache and trouble sleeping. Some people even briefly see or hear things while still knowing what's real. DTs is different because the person becomes truly confused and loses touch with their surroundings, often with fever and a dangerously fast heart rate. When in doubt, treat it as an emergency.

When Do DTs Start and How Long Do They Last?

DTs usually begins 48 to 96 hours (two to four days) after the last drink, but it can appear as late as 7 to 10 days later (MedlinePlus). That delay is what makes it so dangerous: people often feel the worst is over before DTs sets in.

Here's how alcohol withdrawal typically unfolds:

• About 6 hours after the last drink: Mild withdrawal begins, with shakiness, anxiety, sweating, nausea and headache.
• 12 to 48 hours: Some people have brief hallucinations while still alert. Withdrawal seizures are most likely in this window.
• 48 to 96 hours: DTs most often begins, with confusion, agitation, fever and a racing heart.
• Up to 7 to 10 days: Late-onset DTs is still possible.

Once it starts, DTs usually lasts up to about five days with treatment (StatPearls). Some effects, like fatigue, mood swings and trouble sleeping, can linger for months or even a year.

For a full breakdown of milder withdrawal stages, see our guide to the alcohol withdrawal timeline (coming soon).

Who Is at Risk for Delirium Tremens?

DTs is most likely in people who have been drinking heavily every day for a long time. MedlinePlus points to daily heavy drinking for several months, or alcohol use for more than 10 years, as key risks. As a rough guide, that's around 1 bottle of wine, 7 to 8 pints of beer or 1 pint of liquor a day.

The risk is higher if someone has:

• Had DTs before, or a history of alcohol withdrawal or detox
• Had withdrawal seizures in the past
• Another illness at the same time, such as an infection, pneumonia or a head injury
• Older age
• Low potassium or other electrolyte problems
• Poor nutrition or eating very little while drinking
• Gone a longer time since their last drink

A Hidden Risk: Hospital Stays

DTs sometimes starts when someone who drinks heavily is admitted to a hospital for something else, like surgery or an injury, and suddenly can't drink. If you or a loved one drinks heavily, tell the care team so they can watch for withdrawal from the start.

How Delirium Tremens Is Treated in the Hospital

DTs must be treated in a hospital, often in an intensive care unit. Treatment focuses on calming the overactive nervous system, preventing seizures and supporting the body until the brain rebalances.

• Benzodiazepines: Medicines like lorazepam, diazepam or chlordiazepoxide are the main treatment. They act on the same calming GABA system that alcohol did.
• Other sedatives for severe cases: If benzodiazepines aren't enough, doctors may add phenobarbital, dexmedetomidine or propofol, sometimes with a breathing machine.
• Thiamine (vitamin B1) and vitamins: Given early to prevent Wernicke encephalopathy, a serious brain disorder caused by thiamine deficiency.
• Fluids and electrolytes: IV fluids correct dehydration, and doctors replace low potassium, magnesium and phosphate.
• Close monitoring: Nurses track heart rate, blood pressure, temperature, breathing and withdrawal severity, often using a scoring tool called CIWA-Ar.
• Treating related problems: Infections, liver disease, heart rhythm problems and injuries from falls or seizures.

How to Prevent Delirium Tremens

The best way to prevent DTs is to never stop heavy drinking suddenly on your own. Medically supervised withdrawal lets a provider spot early warning signs and use medication before symptoms become severe.

• Don't quit cold turkey after long-term heavy drinking. Talk to a provider first about the safest way to stop.
• Get assessed before you stop. A provider can check your risk factors, like past withdrawal, seizures and other health conditions, and decide whether you need inpatient or outpatient care.
• Know the warning signs. Rising shakiness, sweating, a racing heart or any confusion after stopping are reasons to get help right away.
• Tell hospital staff about your drinking. Before surgery or any admission, so they can monitor and treat withdrawal early.
• Eat and take thiamine if recommended. Poor nutrition raises the risk of DTs and related brain damage.

People at high risk usually need inpatient detox. People with mild withdrawal and no major risk factors may be able to withdraw as outpatients with close follow-up. Your provider will help decide which is safest.

Life After DTs: Long-Term Recovery From Alcohol Use Disorder

Surviving DTs is a turning point, but the hospital treats only the withdrawal, not the alcohol use disorder behind it. Anyone who has had DTs is at higher risk of severe withdrawal again, so returning to heavy drinking is especially dangerous.

Ongoing care usually includes:

• Medication for alcohol use disorder: Naltrexone (including the monthly Vivitrol® shot), acamprosate and other medications reduce cravings and help prevent a return to drinking.
• Counseling and therapy: Cognitive behavioral therapy and substance use counseling build skills for handling triggers and stress.
• Mental health care: Depression and anxiety are common after heavy drinking and can be treated alongside recovery.
• Support groups: Peer support like AA or SMART Recovery adds connection and accountability.
• Medical follow-up: Checking the liver, heart, nerves and nutrition, which long-term drinking can affect.

How MATClinics Can Help

MATClinics provides outpatient treatment for alcohol use disorder at eight locations across Maryland and through telemedicine. After a hospital stay or detox, we can help you stay alcohol-free with medication such as Vivitrol, counseling, mental health therapy and psychiatry, all in one place.

We accept all Maryland Medicaid plans, Medicare Part B and CareFirst, offer evening and Saturday hours and often see new patients the same day. Call 410-220-0720 or schedule an appointment.

MATClinics does not provide emergency or inpatient detox. If someone is in severe withdrawal right now, call 911 or go to the nearest emergency room. For more crisis options, see our crisis support resources.

Frequently Asked Questions About Delirium Tremens

What Are the First Signs of DTs?

Early signs include worsening shakiness, heavy sweating, a racing heart, agitation and trouble sleeping. Confusion or hallucinations 2 to 4 days after the last drink are red flags that need emergency care.

How Long After Your Last Drink Can DTs Start?

Usually 48 to 96 hours after the last drink, but it can begin up to 7 to 10 days later.

Can You Die From Delirium Tremens?

Yes. Untreated DTs can be fatal in up to 37% of cases. With early hospital treatment, the risk drops below 5%.

How Much Do You Have to Drink to Get DTs?

DTs usually follows months to years of heavy daily drinking, such as a pint of liquor or 7 to 8 pints of beer a day. Past withdrawal, seizures and other illnesses raise the risk.

Can You Have DTs More Than Once?

Yes, and having DTs once makes severe withdrawal more likely in the future. Supervised withdrawal and long-term treatment help prevent it from happening again.

Can You Treat DTs at Home?

No. DTs requires hospital care. If you suspect DTs, call 911.

What's the Difference Between DTs and Alcohol Withdrawal Seizures?

Withdrawal seizures usually happen 12 to 48 hours after the last drink and can occur without DTs. DTs usually starts later and involves ongoing confusion. Both need emergency care.