Short answer: Zaleplon (Sonata) is a very short-acting prescription sleep medicine, a Z-drug related to zolpidem, for trouble falling asleep. It is a Schedule IV controlled substance. It carries a boxed warning for complex sleep behaviors such as sleepwalking and sleep-driving, which can cause serious injury.
Key takeaways
- What it is: Zaleplon is a non-benzodiazepine hypnotic (z-drug) and a Schedule IV controlled substance in the US.
- Main uses: Insomnia (trouble falling asleep).
- Timing: effects start in 15 to 30 minutes and last about 4 hours.
- Most dangerous mix: Opioids, which can cause profound sedation and slowed breathing.
- Naloxone: it does not reverse this drug, but give it whenever opioids could be involved.
- Dependence risk: Moderate.
- Legal route: only with a prescription from a DEA-registered clinician, filled by a licensed pharmacy.
What is zaleplon?
Zaleplon helps people fall asleep. Because it wears off within about 4 hours, it can be taken later in the night if at least 4 hours remain in bed, with less next-morning grogginess than longer-acting sleep pills.
It acts on the same GABA-A receptors as benzodiazepines, mainly the subtype linked to sleep.
Quick facts
| Fact | Zaleplon |
|---|---|
| Generic name | Zaleplon |
| Brand names | Sonata |
| Drug class | Non-benzodiazepine hypnotic (pyrazolopyrimidine) |
| US legal status | Schedule IV, prescription only |
| Approved uses | Short-term treatment of insomnia with difficulty falling asleep |
| Forms | Capsules (5, 10 mg) |
| Onset | 15 to 30 minutes |
| Half-life | About 1 hour |
How long does zaleplon last?
- Starts working: 15 to 30 minutes
- Effects last: About 4 hours
- Half-life: About 1 hour
Its half-life is about 1 hour, so it is cleared within several 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 zaleplon?
The FDA requires boxed warnings, its strongest, on zaleplon products, including:
- Complex sleep behaviors, including sleepwalking, sleep-driving, and other activities while not fully awake, have caused serious injuries and death. Stop zaleplon if one occurs, and do not take it after a previous episode.
Common side effects include headache, drowsiness, dizziness, and tingling.
Memory and judgment: taking it and staying awake can cause amnesia and impaired judgment.
Dependence: regular use can lead to tolerance, dependence, and rebound insomnia on stopping.
What should you never mix with zaleplon?
| Combined with | What happens | Label guidance |
|---|---|---|
| Opioids | Profound sedation and slowed breathing | Avoid |
| Alcohol | Deeper sedation and complex sleep behaviors | Avoid |
| Other sleep medicines and sedatives | Additive impairment | Avoid |
| Cimetidine | Raises zaleplon levels | Use 5 mg dose |
| Rifampin | Lowers levels | May reduce effect |
Check any combination with the DoseUses combination checker or ask a pharmacist.
What are the signs of a zaleplon overdose, and what should you do?
Zaleplon overdose causes drowsiness, confusion, poor coordination, and, at high doses or with other depressants, coma and slowed breathing.
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 zaleplon, 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 zaleplon withdrawal like, and how long does it last?
Regular use of zaleplon can cause dependence. Stopping after long-term nightly use can cause rebound insomnia and, less commonly, withdrawal symptoms.
- Night 1 to 3Rebound insomniaTrouble sleeping that may be worse than before treatment.
- Days 1 to 7Withdrawal symptomsAnxiety, irritability, sweating, shakiness, and, rarely, seizures after high doses.
- 1 to 2 weeksSettlesSleep usually returns to baseline.
See the withdrawal timelines and the full zaleplon withdrawal guide.
Is zaleplon legal?
In the United States, zaleplon 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; not marketed |
| International | Controls vary by country |
Frequently asked questions about zaleplon
Can zaleplon be taken in the middle of the night?
Yes, if at least 4 hours remain before you need to be awake and alert.
Is Sonata stronger than Ambien?
It is shorter acting. It helps people fall asleep but may not keep them asleep as long as zolpidem.
Is zaleplon a benzodiazepine?
No, but it acts on the same receptors and has similar risks of dependence.
Can zaleplon cause sleepwalking?
Yes. It carries a boxed warning for complex sleep behaviors.
How long does zaleplon stay in your system?
Its half-life is about 1 hour, so it is cleared within several hours.
Sources
- Sonata (zaleplon) prescription 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.
This guide summarizes the sourced DoseUses Zaleplon profile, written from FDA labels, DEA rules, and federal health agencies. It is educational and is not medical advice. Last updated October 5, 2026.
