Quick Answer: Zopiclone has an elimination half-life of about 5 hours in healthy adults, so a single dose is essentially out of your system within 24 to 30 hours. Feeling normal comes sooner, but Health Canada found driving impairment can last up to 11 hours after a 7.5 mg dose. Age and liver function stretch every number.
How long does zopiclone stay in your system? The Canadian numbers are specific. Zopiclone, sold as Imovane and as generics like Apo-Zopiclone, has a half-life of about 5 hours in healthy adults, meaning your body removes half the remaining drug roughly every 5 hours. Pharmacology's rule of thumb is that a medication is essentially cleared after about five half-lives, which puts full clearance at roughly a day, and closer to 30 hours or more for seniors. The catch is that "cleared" and "safe to drive" are different clocks: Health Canada's summary safety review measured impairment up to 11 hours after a 7.5 mg dose, often without the person feeling it. Mattress Miracle is a family-owned sleep store in Brantford, Ontario, not a pharmacy; we publish this because customers ask, and the numbers come from the product monograph rather than from us. Your pharmacist can map them onto your own dose and health.
"The version of this question I hear in the showroom is always about the morning: 'I take it at eleven, I drive to work at seven, is that fine?' Nobody had shown them the arithmetic. Eleven to seven is eight hours, and the impairment window Health Canada measured is eleven. People do that math once, in front of you, and you can see the routine change on the spot."
Brad Grose, founder, Mattress Miracle, family owned in Brantford since 1997, with 40+ years in the mattress industry
In This Guide
Reading Time: 6 minutes
How long does zopiclone stay in your system?
Zopiclone stays in the system of a healthy adult for roughly 24 to 30 hours after a single dose. The monograph puts the elimination half-life at about 5 hours, and five half-lives is the standard benchmark for a drug being essentially gone. The half-life is the same whether the tablet is 3.75 mg or 7.5 mg; what the bigger dose changes is how much drug is present at every point along the way, which is why the 7.5 mg dose carries the longer real-world impairment tail. Zopiclone is absorbed quickly, reaching peak blood levels within about 90 minutes, and it is also secreted into saliva, which is where the famous metallic taste comes from and why the taste can outlast the sleepiness.
The zopiclone timeline, hour by hour
The zopiclone timeline below is built from the monograph's numbers for a healthy adult taking an evening dose. It reads differently for seniors, and your pharmacist's version of it beats ours.
- 0 to 1.5 hours: absorption; peak blood levels arrive within about 90 minutes
- 1.5 to 8 hours: the working window; this is why the label requires a full 7 to 8 hour sleep opportunity
- 8 to 11 hours: the hidden zone; you may feel awake while coordination and reaction time are still measurably reduced, per Health Canada
- About 25 to 30 hours: essentially cleared in healthy adults (five half-lives at about 5 hours each)
- Longer: seniors and anyone with reduced liver function run a slower clock at every stage
What stretches the clock
Four things reliably extend how long zopiclone lasts in the body. Age is the big one: clearance slows in older adults, and the monograph's half-life figures run closer to 7 hours in seniors, which is why geriatric dosing starts at 3.75 mg (the reasoning is unpacked in our zopiclone dosage guide). Liver function is second: zopiclone is broken down by the liver, so hepatic impairment prolongs everything. Third, dose: 7.5 mg leaves more drug in the bloodstream at hour 8 than 3.75 mg does. Fourth, other medications: drugs that inhibit the liver enzyme CYP3A4 (some antibiotics and antifungals among them) slow zopiclone's breakdown, and sedating medications add their effects on top. That interaction check is a pharmacist's job, and it is exactly what they scan for.
Feeling sober is not the same as being clear
The central finding of Health Canada's 2014 review was that next-day impairment from zopiclone can be present without the person feeling drowsy. Research on residual sedative effects consistently shows self-assessment lags measured performance. Nothing on this page is medical advice; the safe reading of the numbers is the label's own line, do not drive until you know how your dose affects you.
Does zopiclone show up on a drug test?
Zopiclone is not part of the standard workplace immunoassay panels, which look for drug classes like opioids, amphetamines and cannabis. It is also chemically distinct from benzodiazepines, so it does not reliably trigger a benzodiazepine screen. Specialized toxicology testing can detect zopiclone in blood or urine while it remains in the body, which for most adults means roughly the clearance window above. If testing matters for your work, the honest answer is to name the prescription to whoever administers the program; a legitimate prescription is the normal resolution, and hiding a sedative from a safety-sensitive employer is the wrong problem to solve.
What this means for driving and mornings
The practical reading of zopiclone's timeline is about scheduling, not fear. Take it only when a full 7 to 8 hours of sleep is genuinely available. Count forward 11 hours from the dose before assuming the wheel is safe, especially at 7.5 mg, and give the routine extra margin in the first week while you learn how your dose behaves. If mornings keep colliding with the window, that is a conversation with your prescriber about dose or alternatives, not a reason to shave the sleep opportunity. The wider context, including how zopiclone compares with the options that have no next-day tail, lives in our sleep aids in Canada guide and the plain-language zopiclone guide.
The showroom perspective
Mattress Miracle has been fitting beds in Brantford since 1997, and the timeline question usually arrives attached to a commute: Hamilton, Cambridge, the 403 at dawn. Our lane is the other half of the equation. If the bed is causing the 3 a.m. wake-ups that make the pill feel necessary, fixing the bed shortens the medication story. Come by 441 1/2 West Street or call (519) 770-0001; honest answers from a non-commission team.
Frequently Asked Questions
How long does zopiclone 7.5 mg stay in your system?
The half-life is the same as any dose, about 5 hours in healthy adults, so clearance still lands around 24 to 30 hours. The difference is that 7.5 mg leaves more drug present at every hour along the way, which is why the 11 hour impairment window matters most at this dose.
How long does zopiclone 3.75 mg stay in your system?
About the same total clearance time, roughly a day, since half-life does not change with dose. The lower dose simply means less drug in the bloodstream at each point, which is why 3.75 mg is Canada's recommended starting dose and the gentler option for mornings.
Is zopiclone out of your system after 12 hours?
Not entirely. After 12 hours a healthy adult has cleared most but not all of a dose; full clearance takes about five half-lives, closer to a day. Measurable impairment, the part that matters for driving, was found up to 11 hours after 7.5 mg in Health Canada's review.
Why can I still taste zopiclone the next day?
Zopiclone is secreted into saliva, so the bitter or metallic taste tracks the drug itself, not the tablet coating. It can linger while the last of the dose clears and fades once the medication is stopped. Our zopiclone side effects guide covers it in detail.
Visit Our Brantford Showroom
Mattress Miracle
441 1/2 West Street, Brantford
Phone: (519) 770-0001
Hours: Mon-Wed 10-6, Thu-Fri 10-7, Sat 10-5, Sun 12-4
Wondering why you need the pill in the first place? Bring us the wake-up pattern and we will tell you honestly whether the mattress is part of it. No pressure, from the family that has done this since 1997.
Related Reading
- Zopiclone in Canada: the complete plain-language guide
- Zopiclone side effects, explained
- Is zopiclone addictive? Dependence, withdrawal and the way off
- Sleep aids in Canada: every option compared
Sources
- Imovane (zopiclone) Product Monograph, Sanofi-Aventis Canada: pdf.hres.ca
- Health Canada Summary Safety Review, next-day impairment: dhpp.hpfb-dgpsa.ca