Guide
Barbiturates vs. Xanax: Is Xanax a Barbiturate? How the Two Drug Classes Compare
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Published November 5, 2026
Reviewed and updated November 7, 2026
People often lump barbiturates and Xanax together. Both calm the brain, ease anxiety and make you sleepy. But they are different kinds of drugs, and the gap matters for safety. This page explains what barbiturates are and how Xanax compares. It covers why both turn deadly with alcohol or opioids, and why neither should be stopped all at once after daily use.
Is Xanax a barbiturate?
No. Xanax is a benzo, short for benzodiazepine. Barbiturates are an older, separate group of sedatives. Both are depressants, which means they slow the brain down.
The DEA says both are used for sleep, anxiety, muscle spasms and seizures. The common benzos it lists are Valium, Xanax, Halcion, Ativan and Klonopin.
Source: Benzodiazepines and Barbiturates, Drug Fact Sheets, Drug Enforcement Administration.
What are barbiturates, and what are some examples?
Barbiturates are sedatives that relax you and make you sleepy. Brand names include Fiorinal, Seconal, Nembutal and Pentothal. Phenobarbital is another one.
Street names include barbs, reds, pinks and yellow jackets. The DEA says people misuse them to calm anxiety, lower inhibitions, and blunt the effects of other drugs.
Most people who take them for seizures or pain do not misuse them, the National Library of Medicine says. Those who do often start with pills prescribed to them or to a relative.
Source: Barbiturate intoxication and overdose, MedlinePlus, National Library of Medicine.
How do barbiturates and Xanax compare?
They feel alike and share many risks. But barbiturates add one: the body gets used to the high faster than it gets used to the deadly effects.
The National Library of Medicine explains the danger. With repeated use, the high fades fast, but tolerance to the lethal effects builds slowly. So someone who takes more to feel the same moves closer to a fatal dose. Even at low doses, barbiturates can make a person seem drunk.
For Xanax, the FDA label warns that use can lead to misuse and addiction, and from there to overdose or death.
Source: XANAX (alprazolam) prescribing information, DailyMed, National Library of Medicine.
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Why is mixing them with alcohol or opioids so dangerous?
Because they all slow breathing. Together they can knock a person out, stop their breathing, and kill them. Most barbiturate overdoses involve this kind of mix.
The National Library of Medicine says the mix is usually alcohol, or opioids such as heroin, oxycodone or fentanyl. The FDA’s strongest warning on Xanax says the same about benzos and opioids: deep sedation, slow breathing, coma and death.
If someone is very hard to wake, breathing slowly or not at all, call 911. If opioids may be involved, give naloxone if you have it. It reverses the opioid part of an overdose.
What are the signs of a barbiturate or benzodiazepine overdose?
Signs include extreme sleepiness, confusion, clumsiness, slow or shallow breathing, and coma. For barbiturates, the DEA adds low blood pressure and low body temperature.
For benzos, the DEA lists extreme sleepiness, confusion, poor coordination, slow reflexes, slow breathing and coma. Any of these needs emergency care. Call 911.
Is it dangerous to stop barbiturates or Xanax suddenly?
Yes. After daily use, stopping either one at once can cause withdrawal that can kill. Both should be cut back slowly, with a doctor’s help.
The National Library of Medicine says barbiturate users become physically dependent, and stopping suddenly can be deadly. The FDA label for Xanax says the same about stopping fast, and calls for a slow taper.
How fast to cut back is a medical decision for each person. The benzodiazepine detox page explains how Briarwood handles it.
How does Briarwood treat sedative withdrawal?
Briarwood’s inpatient centers in Austin and Houston treat benzodiazepine withdrawal with a nurse on site 24 hours a day and a physician on call. If you depend on a barbiturate, call admissions to ask whether the inpatient program fits.
The medical team chooses and adjusts medicine as withdrawal develops, and vital signs are checked every four hours for the first 72 hours. Before discharge, a counselor arranges the next step, such as an intensive outpatient program or residential treatment. The prescription drug detox page covers other medicines, and a free benefit check shows what your insurance covers.
Common Questions
Is Xanax a barbiturate?+–
No. Xanax (alprazolam) is a benzodiazepine. Barbiturates are a separate, older class. Both are central nervous system depressants.
What are examples of barbiturates?+–
Prescribed barbiturates include Fiorinal, Seconal, Nembutal, Pentothal and phenobarbital, according to the DEA and the National Library of Medicine.
Are barbiturates more dangerous than benzodiazepines?+–
Barbiturates carry an added risk: tolerance to their deadly effects builds more slowly than tolerance to the high, so taking more moves a person closer to a fatal dose.
Can you mix Xanax and alcohol?+–
It is dangerous. Benzodiazepines, barbiturates, alcohol and opioids all slow breathing, and the National Library of Medicine says most barbiturate overdoses involve a mix like this.
Can you stop Xanax cold turkey?+–
Not safely after regular use. The FDA label warns sudden stopping can cause life-threatening withdrawal and recommends a gradual taper under medical care.
Does Briarwood treat Xanax withdrawal?+–
Yes, at its inpatient centers in Austin and Houston, with a nurse on site 24 hours a day and a physician on call. For barbiturate dependence, call admissions to talk through the options.
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About the people behind this guide
Anna-Grace Washington
Medical Content Writer
Anna-Grace Washington is a Medical Content Writer for Briarwood Detox Center. She holds a master’s degree in clinical psychology from the University of Texas and brings a strong understanding of behavioral health, addiction recovery, and evidence-based treatment concepts to her writing.
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