Key takeaway
You are about to stop phenobarbital, or another barbiturate, because the bottle is old or because you want to arrive clean. Withdrawal after prolonged use can be life-threatening. No approved medicine treats addiction to this class. Show the generic name to a clinician. Do not stop tonight.
Last updated: Mon Oct 05 2026 00:00:00 GMT+0000 (Coordinated Universal Time)
You are holding phenobarbital, or another old sedative, and you are about to stop it tonight so you can arrive at treatment with a clean result. Do not. Show a clinician the generic name on the label. Withdrawal after prolonged barbiturate use can be life-threatening. If the bottle is a benzodiazepine, that is a different warning, in benzodiazepine withdrawal.
If a seizure, collapse, or slowed breathing has already started, call 911. For a mental health crisis, call or text 988.
What is in the bottle
Barbiturates sit with benzodiazepines in the group of drugs that slow brain activity. NIDA's examples are mephobarbital, phenobarbital, and pentobarbital sodium. Clinicians reach for them less often for anxiety or sleep, because the overdose risk is higher than with benzodiazepines. They are still used in surgery and for seizure disorders. A brand on an old bottle may not match what a pharmacy stocks now. The generic name is the one to show.
Most of these drugs increase GABA, a chemical that quiets nerve activity. That is why a prescribed dose can make someone drowsy. The same quieting is why a large dose, or a dose mixed with alcohol, can slow breathing. The wider map of opioids, sedatives, and stimulants is in prescription drug misuse.
Dependence means the body has adapted to a drug taken steadily. Addiction means compulsive use despite harm. They overlap, and they are not the same word. Someone who is dependent can still have withdrawal if the dose drops suddenly, including when the medicine was prescribed for seizures. Stopping a seizure medicine to look ready for a residential door is a conversation with the prescriber, not a goal.
If the drug stops
Benzodiazepine withdrawal can be problematic and is rarely life-threatening. Withdrawal from prolonged barbiturate use can have life-threatening complications. Someone stopping, or already in withdrawal, should talk with a physician or get medical care immediately. Do not use the word rarely as permission to quit a benzodiazepine in a bedroom. Stopping a benzodiazepine suddenly, or reducing it too fast, can cause life-threatening withdrawal, including seizures.
A clinician lowers the dose
People using tranquilizers, sedatives, or hypnotics should not try to stop on their own. Withdrawal can be severe and, for some of these medicines, life-threatening. Research on treating the addiction is sparse. People who are dependent should go through medically supervised detoxification, because the dose needs to come down gradually. Counseling can help during that process. There are no FDA-approved medications for addiction to this sedative class. Do not borrow methadone, buprenorphine, or naltrexone. They treat opioid use disorder, not this withdrawal.
Copying a milligram from a forum is how seizures happen outside a clinic. Who needs a medical setting is in detox at home versus medical care. What medically supervised means across levels of care is in medically supervised detox. A pamphlet that says it detoxes everything has not named a prescriber.
Alcohol and opioids in the same week
Sedative misuse often travels with alcohol or opioids, and care has to deal with each problem. A sudden stop after chronic heavy drinking can be life-threatening. Combining drugs that slow breathing is a different emergency from withdrawal alone. That overlap is in polysubstance use. Breathing that has already slowed is in opioid overdose signs. Naloxone is for opioids. It does not reverse a barbiturate.
Do not skip doses to look clear before an appointment. Search FindTreatment.gov for a program that monitors withdrawal with a clinician. Call or text (800) 653-9376 if you need help finding that care. Bring the bottle.
Additional Resources
Sources cited on this page:
- NIDA: What classes of prescription drugs are commonly misused? (CNS depressants)
- NIDA: How can prescription drug addiction be treated? (CNS depressants)
- FDA: Boxed warning to improve safe use of benzodiazepines
- NIAAA Core Resource: Alcohol Use Disorder, From Risk to Diagnosis to Recovery
- SAMHSA FindTreatment.gov
- 988 Suicide & Crisis Lifeline
Common Questions
Is a barbiturate the same warning as a benzodiazepine?
No. Both slow the brain, and both can cause a rebound that includes seizures if they are stopped abruptly. NIDA says benzodiazepine withdrawal is rarely life-threatening, while prolonged barbiturate withdrawal can be. Do not use that rarely line to stop a benzodiazepine. The FDA warning says a sudden stop or a fast cut of a benzodiazepine can cause life-threatening seizures. Read the name on the bottle.
Which drugs is this about?
NIDA's examples are mephobarbital, phenobarbital, and pentobarbital sodium. They are used less often for anxiety or sleep than benzodiazepines because overdose is more likely, and they are still used in surgery and for seizure disorders. A brand on an old bottle may not match what a pharmacy stocks now. Show a clinician the generic name. Do not stop a seizure medicine to look ready for treatment.
Can I taper a barbiturate with a chart from the internet?
No. People who are dependent should have medically supervised detoxification because the dose should come down gradually, and they should not stop on their own. Research on treating this addiction is sparse. If a seizure, collapse, or slowed breathing has already started, call 911.
Is there a pill that treats barbiturate addiction?
Not an approved one. NIDA says there are currently no FDA-approved medications for treating addiction to this class, though research continues. Counseling can be part of care. Cognitive-behavioral therapy has been used to help people stop benzodiazepines. That finding is not a barbiturate method. Medicines for opioid use disorder do not become sedative treatment because both problems are present.
What if alcohol or an opioid is in the picture too?
Misuse of these sedatives often happens along with alcohol or opioids, and treatment should address each problem. Slowed breathing is more likely when depressant drugs are combined. Do not skip doses to clear your system before an appointment. Call 911 if breathing slows or the person will not wake.