How Long Does Zopiclone Take to Work?

Zopiclone usually takes 30 to 60 minutes to work, according to the NHS. It is a prescription sleep medication used to treat insomnia for a short period of time, including having trouble falling asleep, waking up during the night, or waking up too early.

The 30- to 60-minute time frame is a general guideline; it is not a guarantee that everyone will fall asleep within that time frame. Zopiclone affects people differently, and other medications, alcohol, and sensitivity to sedatives can influence its effectiveness.

How does zopiclone work?

Zopiclone is a hypnotic drug in a class of drugs commonly called Z-drugs. It works on the brain's GABA system, which helps to create a calming and sleep-promoting effect.

It may be prescribed for severe insomnia that is disabling or distressing. Zopiclone can help you overcome problems getting to sleep and staying asleep, but it is only intended as a short-term treatment, not a long-term solution to insomnia.

NICE recommends considering non-drug treatment options in the management of insomnia and that hypnotic medicines be used for short periods when appropriate.

For information about medicines used for sleep problems, see PharmNexa's sleeping tablets category.

How long does zopiclone take to work?

Zopiclone usually takes between 30 and 60 minutes to start working. It is taken once a day before going to sleep as prescribed.

The duration of action of zopiclone is not the same as its duration in the body. The effects of the drug may last beyond the initial onset, and some people may feel drowsy the next day.

It is therefore important not to interpret the 30-to-60-minute timeframe as a reason to take another dose if sleep does not occur within that period. The NHS advises not to take more than one dose in the same night.

What can affect how quickly zopiclone works?

Individual reaction

Medicines affect people in different ways. Your age, general health, sensitivity to the sedative effect and other medicines could affect how zopiclone affects you.

Other medications

Some medicines can make the sedative effects of zopiclone stronger or change the way it works. The NHS says interactions can happen with medicines, including other treatments for sleep or anxiety, opioid painkillers, some antidepressants, antipsychotics, epilepsy medicines and sedating antihistamines. Some antibiotics and antifungal medicines can also interact with zopiclone.

Tell your doctor or pharmacist about all prescription medicines, over-the-counter medicines and supplements you use.

Alcohol

Alcohol can increase the sedative effects of zopiclone. The NHS advises avoiding alcohol while taking it because the combination can increase the risk of excessive sedation and other serious effects.

The MHRA has also strengthened warnings for Z-drugs about risks associated with combining them with substances such as alcohol and opioids.

Can you take more zopiclone if it has not worked?

No. Do not take an additional dose because zopiclone does not appear to be working quickly enough.

The NHS advises taking no more than one dose in the same night. Taking extra zopiclone can be dangerous and may increase the risk of excessive sedation and other adverse effects.

If your prescribed treatment is not helping your insomnia, talk to your doctor or pharmacist rather than changing the dose yourself.

How long does zopiclone stay in your system?

The time zopiclone takes to start working is different from the time it remains in the body.

NICE reports an elimination half-life of approximately 3.5 to 6.5 hours. Half-life means the time taken for the amount of medicine in the body to reduce by half; it does not mean that all effects necessarily disappear after that period.

Sedative effects can persist into the next day. The NHS advises people taking zopiclone not to drive, cycle or use machinery for 12 hours after taking it.

Can zopiclone cause next-day drowsiness?

Yes. The next day you may feel tired, sleepy, dizzy or have decreased alertness.

This is important information if you drive, cycle, operate machinery or do anything that requires concentration and fast reactions. There is a risk of impairment if taken with alcohol and other sedatives.

If you feel sleepy or less alert, do not do anything that might put you or others at risk because of decreased alertness.

How long is zopiclone usually used for?

Zopiclone is intended for short-term treatment of insomnia. The NHS states that treatment usually lasts from a few days to a few weeks and is generally not prescribed for more than four weeks because tolerance can develop.

NICE also recommends limiting a single treatment period with zopiclone to four weeks, including any period used for tapering.

The short-term approach is important because Z-drugs can be associated with tolerance, dependence and withdrawal symptoms.

Can you become dependent on zopiclone?

Yes. Zopiclone is a Z-drug and can cause dependence, tolerance and withdrawal.

NICE guidance on medicines associated with dependence and withdrawal includes Z-drugs such as zopiclone. Dependence and addiction are related but not the same thing. Physical dependence can occur when the body gets used to a medicine, while addiction includes features such as cravings and difficulty controlling use.

In January 2026 the MHRA strengthened warnings on Z-drugs and other medicines associated with dependence. The new data underscores the dangers of addiction, dependence, withdrawal and tolerance.

If you have been taking zopiclone regularly and wish to stop, speak to your prescriber. Do not stop taking this medicine suddenly without your doctor's advice. Withdrawal symptoms may occur, and the dose may need to be gradually reduced.

What if zopiclone does not help you sleep?

If zopiclone does not appear to help, do not take an extra dose.

Ongoing insomnia can have different causes, and a sleeping medicine does not necessarily address the reason someone is having difficulty sleeping. A doctor or pharmacist can review the symptoms, other medicines and treatment options.

For insomnia, NICE suggests considering non-pharmacological approaches. If sleep problems don't improve with treatment, talk to a health care professional.

Can zopiclone cause unusual sleep behaviours?

Z-drugs can sometimes be associated with complex sleep behaviours, including sleepwalking or performing activities while not fully awake. NHS advice is to seek medical help if there are serious sleep-related behaviours.

Alcohol and other sedating medicines can increase safety concerns. Tell your healthcare professional about other medicines or substances you use.