Short answer: Alprazolam (brand name Xanax) is a short-acting benzodiazepine prescribed for generalized anxiety disorder and panic disorder. It is a Schedule IV controlled substance in the United States, available only by prescription. It works within about an hour, and it can cause dependence, so stopping it suddenly after regular use can trigger withdrawal, including seizures.
Key takeaways
- What it is: Alprazolam is a benzodiazepine and a Schedule IV controlled substance in the US.
- Main uses: Anxiety; panic disorder.
- Timing: effects start in 30 to 60 minutes and last 4 to 6 hours (immediate release).
- Most dangerous mix: Opioids (oxycodone, fentanyl, codeine), which can cause slowed breathing, coma, death.
- Naloxone: it does not reverse this drug, but give it whenever opioids could be involved.
- Dependence risk: High.
- Legal route: only with a prescription from a DEA-registered clinician, filled by a licensed pharmacy.
What is alprazolam?
Alprazolam is FDA-approved for the short-term treatment of generalized anxiety disorder and for panic disorder with or without agoraphobia. The extended-release form (Xanax XR) is approved for panic disorder only.
It belongs to the benzodiazepine class. These medicines increase the effect of GABA, the brain's main calming chemical, which reduces anxiety and causes sedation.
Quick facts
| Fact | Alprazolam |
|---|---|
| Generic name | Alprazolam |
| Brand names | Xanax, Xanax XR |
| Drug class | Benzodiazepine |
| US legal status | Schedule IV, prescription only |
| Approved uses | Generalized anxiety disorder, panic disorder |
| Forms | Tablet, extended-release tablet, orally disintegrating tablet, oral solution |
| Peak effect | 1 to 2 hours after an immediate-release dose |
| Half-life | About 11 hours on average (range 6 to 27) in healthy adults |
| Broken down by | Liver enzyme CYP3A4 |
How long does alprazolam last?
- Starts working: 30 to 60 minutes
- Effects last: 4 to 6 hours (immediate release)
- Half-life: About 11 hours on average (range 6 to 27) in healthy adults
Immediate-release alprazolam usually starts working within 30 to 60 minutes and reaches its peak level in the blood after 1 to 2 hours.
Timing varies with the dose, the form, how it is taken, liver and kidney function, age, and other drugs taken at the same time.
What are the biggest risks of alprazolam?
The FDA requires boxed warnings, its strongest, on alprazolam products, including:
- Taking benzodiazepines with opioids can cause profound sedation, slowed breathing, coma, and death.
- Benzodiazepines can be misused and can lead to addiction, which raises the risk of overdose and death.
- Regular use can cause physical dependence. Stopping suddenly or cutting the dose quickly can cause withdrawal reactions, including seizures, that can be life-threatening.
Common side effects include drowsiness, tiredness, lightheadedness, poor coordination, memory problems, slurred speech, irritability, constipation, and changes in appetite or sex drive.
Serious risks include impaired driving, falls (especially in older adults), worsening depression, and breathing problems in people with lung disease or sleep apnea. Use late in pregnancy can cause sedation and withdrawal symptoms in the newborn.
What should you never mix with alprazolam?
| Combined with | What happens | Label guidance |
|---|---|---|
| Opioids (oxycodone, fentanyl, codeine) | Slowed breathing, coma, death | Boxed warning; avoid unless no alternative |
| Alcohol | Stronger sedation and slowed breathing | Avoid |
| Other sedatives, sleep medicines, gabapentinoids | Additive drowsiness and impaired coordination | Use caution |
| Ketoconazole, itraconazole | Sharply raise alprazolam levels | Do not combine |
| Nefazodone, fluvoxamine, cimetidine, erythromycin | Raise alprazolam levels | Lower dose or caution |
| Carbamazepine, phenytoin | Lower alprazolam levels | May reduce effect |
Check any combination with the DoseUses combination checker or ask a pharmacist.
What are the signs of an alprazolam overdose, and what should you do?
Signs include extreme drowsiness, confusion, slurred speech, poor coordination, slow reflexes, and loss of consciousness. Overdose is far more dangerous when alprazolam is combined with opioids or alcohol, because breathing can slow or stop.
If someone may have overdosed
- Call 911 if the person is unresponsive, hard to wake, or breathing slowly.
- For advice when the person is awake and stable, call Poison Help at 1-800-222-1222 (US, free, 24 hours).
- If opioids could be involved, including pills not from a pharmacy, give naloxone if you have it. Naloxone does not reverse alprazolam, but it will not harm the person.
- Stay with the person and place them on their side if they are drowsy or vomiting.
What is alprazolam withdrawal like, and how long does it last?
People who take alprazolam regularly, even as prescribed, can become physically dependent within weeks. Because alprazolam leaves the body quickly, withdrawal tends to start sooner and feel more intense than with longer-acting benzodiazepines.
- Days 1 to 2Symptoms beginRebound anxiety, insomnia, restlessness, sweating, and tremor.
- Weeks 1 to 4Acute withdrawalPanic, irritability, muscle pain, nausea, sensitivity to light and sound, and in severe cases seizures or delirium.
- MonthsProtracted symptoms in some peopleA minority have lingering anxiety, poor sleep, low mood, or tingling that can last weeks to more than 12 months.
See the withdrawal timelines and the full alprazolam withdrawal guide.
Is alprazolam legal?
In the United States, alprazolam is a Schedule IV controlled substance. The only legal way to get it is with a prescription from a clinician registered with the Drug Enforcement Administration (DEA), filled by a licensed pharmacy. Depending on state law, that can be a physician, nurse practitioner, or physician assistant.
- Refills: a Schedule IV prescription can be refilled up to five times within six months of the date it was written. After that, a new prescription is needed.
- Telehealth: federal flexibilities let DEA-registered clinicians prescribe Schedule II to V medicines after a telemedicine visit, without a prior in-person exam, through December 31, 2026. A permanent DEA rule was under final review in late 2026. State rules can be stricter.
- Monitoring: prescribers and pharmacists in most states check a prescription drug monitoring program, a database of controlled-substance prescriptions, before prescribing or dispensing.
Outside the United States
| Country | Status |
|---|---|
| United Kingdom | Class C; available on private prescription, not routinely on the NHS |
| Canada | Schedule IV of the Controlled Drugs and Substances Act, prescription only |
| Australia | Schedule 8 controlled drug since 2014 |
| International | Schedule IV of the 1971 UN Convention on Psychotropic Substances |
Frequently asked questions about alprazolam
How long does alprazolam take to work?
Immediate-release alprazolam usually starts working within 30 to 60 minutes and reaches its peak level in the blood after 1 to 2 hours.
How long does alprazolam stay in your system?
Its average half-life is about 11 hours, so most of a single dose is cleared in two to three days. It can be detected for longer in people who take it regularly, in older adults, and in people with liver disease or obesity.
Is alprazolam addictive?
Yes. It can cause physical dependence and addiction, even at prescribed doses. The risk rises with higher doses, longer use, and a history of substance use disorder.
Can you drink alcohol with alprazolam?
No. Alcohol and alprazolam both slow the central nervous system. Together they increase sedation and the risk of dangerously slow breathing.
Can you buy alprazolam online legally?
Yes, with a valid prescription from a DEA-registered clinician, filled by a pharmacy licensed in your state. Under federal flexibilities that run through December 31, 2026, the prescription can follow a telemedicine visit, subject to state law. A website that sells alprazolam without a prescription is not a legal pharmacy.
Can you purchase alprazolam without a prescription?
No. In the US it is illegal to purchase or possess alprazolam without a valid prescription. Pills sold without one are frequently counterfeit and may contain fentanyl.
How do you order an alprazolam refill?
Ask your pharmacy to refill it, online, by phone, or in person. A Schedule IV prescription can be refilled up to five times within six months of the date it was written if the prescriber authorized refills. After that you need a new prescription.
Is it safe to stop alprazolam suddenly?
No. Stopping suddenly after regular use can cause withdrawal, including seizures. The dose should be lowered gradually with a prescriber.
Sources
- Xanax (alprazolam) prescribing information, DailyMed, US National Library of Medicine.
- FDA warns about serious risks and death when combining opioid pain or cough medicines with benzodiazepines, US Food and Drug Administration, 2016.
- FDA requiring Boxed Warning updated to improve safe use of benzodiazepine drug class, US Food and Drug Administration, 2020.
- Poison Help, Health Resources and Services Administration.
- Joint Clinical Practice Guideline on Benzodiazepine Tapering, American Society of Addiction Medicine, 2025.
- Controlled Substance Schedules, DEA Diversion Control Division.
- 21 CFR 1306.22, Refilling of prescriptions (Schedules III and IV), Electronic Code of Federal Regulations.
- Prescribing controlled substances via telehealth, US Department of Health and Human Services.
This guide summarizes the sourced DoseUses Alprazolam profile, written from FDA labels, DEA rules, and federal health agencies. It is educational and is not medical advice. Last updated October 5, 2026.
