Ambien (Zolpidem) at a glance: schedule, half-life, and class
- Generic name
- Zolpidem tartrate
- Brand names
- Ambien, Ambien CR, Edluar, Intermezzo
- Drug class
- Nonbenzodiazepine hypnotic ("Z-drug")
- US legal status
- Schedule IV, prescription only
- Approved uses
- Insomnia
- Forms
- Tablets, extended-release tablets, sublingual tablets
- Onset
- About 30 minutes
- Half-life
- About 2.5 hours
- Broken down by
- CYP3A4
- FDA boxed warning
- Complex sleep behaviors
Ambien uses: what zolpidem is prescribed for
Zolpidem is approved for short-term treatment of insomnia with difficulty falling asleep. Extended-release zolpidem also helps people stay asleep, and low-dose sublingual zolpidem is for waking in the middle of the night with at least four hours left in bed.[1]
Ambien dosage: how zolpidem is usually prescribed
The figures below come from the FDA-approved label and describe how prescribers typically use zolpidem. They are not personal dosing advice. A prescriber sets the dose for each person and adjusts it over time.[1]
| Product | Women | Men |
|---|---|---|
| Immediate release (Ambien) | 5 mg right before bed | 5 or 10 mg right before bed |
| Extended release (Ambien CR) | 6.25 mg | 6.25 or 12.5 mg |
| Middle-of-the-night (Intermezzo) | 1.75 mg | 3.5 mg |
| Older adults or liver disease | 5 mg (6.25 mg ER) | 5 mg (6.25 mg ER) |
In 2013 the FDA lowered the recommended dose for women after studies showed many still had enough zolpidem in their blood the next morning to impair driving.[1]
Take it only when you can stay in bed for a full 7 to 8 hours.
Ambien (zolpidem) side effects and risks
FDA boxed warning
- Complex sleep behaviors, including sleepwalking, sleep-driving, and other activities while not fully awake, have caused serious injuries and deaths. Stop the medicine if one occurs, and do not take it if you have had one before.[2]
Common side effects include drowsiness, dizziness, headache, diarrhea, and a "drugged" feeling. Next-morning impairment can affect driving even when the person feels awake.[1]
Other risks include memory loss for events after a dose, abnormal thinking and behavior, worsening depression, and dependence with long-term use.[1]
Ambien interactions: what not to mix with zolpidem
Choose what it would be combined with:
| Combined with | What happens | Label guidance |
|---|---|---|
| Opioids | Profound sedation, slowed breathing | Avoid unless no alternative |
| Alcohol | Greater impairment and complex sleep behaviors | Do not drink the same evening |
| Benzodiazepines and other sleep aids | Additive sedation | Avoid combining |
| Ketoconazole, ritonavir | Raise zolpidem levels | Consider a lower dose |
| Rifampin | Lowers zolpidem levels | May reduce effect |
This is not a full list. A pharmacist can check a complete medication list, including supplements and over-the-counter products.[1]
Ambien overdose: signs of zolpidem overdose and what to do
Zolpidem overdose causes deep sleepiness progressing to coma. Breathing problems are more likely when it is combined with alcohol, opioids, or other sedatives.[1]
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 zolpidem, but it will not harm the person.
- Stay with the person and place them on their side if they are drowsy or vomiting.
Ambien withdrawal timeline: how long zolpidem withdrawal lasts
After regular use, stopping zolpidem can cause rebound insomnia and, less often, withdrawal symptoms such as anxiety, shakiness, sweating, and, rarely, seizures after high-dose use.[1]
- Nights 1 to 3Rebound insomniaWorse sleep than before treatment for a few nights.
- Days 1 to 7Withdrawal in long-term usersAnxiety, irritability, tremor, sweating, and nausea.
- WeeksRecoverySleep usually settles; CBT-I helps.
People who have taken zolpidem nightly for months should taper with their prescriber rather than stop suddenly.
How to get prescribed Ambien (zolpidem) legally in the US
In the United States, zolpidem 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.[3]
- 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.[4]
- 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.[5]
- Monitoring: prescribers and pharmacists in most states check a prescription drug monitoring program, a database of controlled-substance prescriptions, before prescribing or dispensing.
- Pharmacies: a legitimate pharmacy always requires a valid prescription, has a licensed pharmacist available, and is licensed in the state it ships to. The FDA's BeSafeRx tool and the NABP's safe pharmacy list help confirm a pharmacy is real.[6][7]
- Cost: generic zolpidem is inexpensive.
Traveling: keep the medicine in its original pharmacy container and carry a copy of the prescription. Check the rules of the destination country before travel, because many countries restrict controlled medicines or require a permit.
Can you order Ambien (zolpidem) online legally?
Yes, but only with a valid prescription and only from a pharmacy licensed in your state. Many licensed pharmacies, including mail-order pharmacies run by insurers, fill zolpidem prescriptions online and ship them. Buying zolpidem from a website that does not require a prescription is illegal, and the product is often fake.[6][8]
- See a licensed clinicianA clinician evaluates you in person or by telemedicine and decides whether zolpidem is appropriate.
- The prescription goes to a pharmacyPrescriptions for controlled medicines are usually sent electronically, straight from the prescriber to the pharmacy you choose.
- The pharmacy checks and fills itA pharmacist verifies the prescription and your identity, then dispenses the medicine in person or by mail.
Signs that an online seller is illegal:
- It sells zolpidem with no prescription, or after only a short online questionnaire.
- It takes orders through social media, messaging apps, or email.
- It asks for payment in cryptocurrency, gift cards, or money transfers.
- It has no US street address, no state pharmacy license, and no pharmacist to speak to.
- Its prices are far below those of ordinary pharmacies, or it ships from another country.
The FDA's BeSafeRx tool links to each state's license lookup, and the National Association of Boards of Pharmacy lists verified online pharmacies.[6][7]
Ambien price: how much does Ambien (zolpidem) cost without insurance?
Generic zolpidem is inexpensive.
What you pay depends on the strength, the number of doses, your insurance plan, and the pharmacy. Cash prices for the same prescription can differ several times over between pharmacies in the same town, so check current prices before you fill it.
Ways to pay less, legally:
- Ask the prescriber whether a generic zolpidem is available. FDA-approved generics work the same way as the brand and usually cost much less.
- Compare cash prices between pharmacies before you fill the prescription.
- Use a free prescription discount card, such as GoodRx or SingleCare, when you pay cash. These cards cannot be combined with insurance on the same fill.
- For brand-name medicines, check the manufacturer's savings program or patient assistance program.
- Ask about a 90-day supply or your insurer's mail-order pharmacy, which often lowers the cost per dose when your prescriber agrees it is appropriate.
Warning: A price far below what licensed pharmacies charge, especially with no prescription required, is a strong sign of an illegal seller and counterfeit medicine.[6]
Is Ambien legal? Zolpidem legal status in other countries
| Country | Status |
|---|---|
| United Kingdom | Class C; prescription only |
| Canada | Prescription medicine; not a scheduled controlled drug |
| Australia | Schedule 4 prescription medicine |
| International | Schedule IV of the 1971 Convention on Psychotropic Substances |
Laws change and differ in detail. Check current rules before carrying any controlled medicine across a border.[9]
Common questions about Ambien (zolpidem)
Why do women get a lower Ambien dose?
Women clear zolpidem more slowly, so the same dose leaves more drug in the blood the next morning and can impair driving.
Is Ambien (zolpidem) a benzodiazepine?
No, but it works on the same GABA-A receptors and has similar risks of dependence and withdrawal.
What are complex sleep behaviors?
Doing activities while not fully awake, such as walking, cooking, or driving, without remembering it later. They can cause serious injuries.
How long does Ambien (zolpidem) stay in your system?
Its half-life is about 2.5 hours, and most is gone within a day.
Can you buy Ambien (zolpidem) without a prescription?
No. Ambien (zolpidem) is a Schedule IV controlled substance in the US, so it is illegal to buy or possess it without a valid prescription. Websites and social media sellers that offer it without one are not legal pharmacies, and the DEA warns that pills sold this way are often counterfeit and can contain fentanyl. The legal route is a visit with a licensed clinician, in person or by telehealth, and a prescription filled at a state-licensed pharmacy. The FDA's BeSafeRx tool and the NABP's safe pharmacy list help confirm an online pharmacy is real.
Sources
- Ambien (zolpidem) prescribing information. DailyMed, US National Library of Medicine.
- FDA adds Boxed Warning for risk of serious injuries caused by sleepwalking with certain prescription insomnia medicines. US Food and Drug Administration, 2019.
- 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.
- BeSafeRx: Your Source for Online Pharmacy Information. US Food and Drug Administration.
- Safe Pharmacy. National Association of Boards of Pharmacy.
- One Pill Can Kill. US Drug Enforcement Administration.
- International drug control conventions. United Nations Office on Drugs and Crime.
