If you take zopiclone and stay awake rather than going to sleep, the drug does not simply stop working. It continues to sedate your brain whether you fight it or not. Staying awake while the medication is active significantly increases the risk of anterograde amnesia, hallucinations, complex behaviours you will not remember, and disinhibition that can lead to risky decisions. According to the official Summary of Product Characteristics (SmPC) for zopiclone, anterograde amnesia occurs “especially when sleep is interrupted or when retiring to bed is delayed after taking the tablet.”
This article explains what happens in the body when zopiclone is active and the person is still awake, and what to consider if zopiclone has become something more complicated than a short-term sleep aid.
What Zopiclone Is and How It Works
Zopiclone belongs to a class of medicines called Z-drugs, or cyclopyrrolone hypnotics. It is prescribed for short-term, severe insomnia and is available only on prescription in the UK. The NHS zopiclone page explains that zopiclone “works by affecting a calming chemical in your brain called gamma-aminobutyric acid (GABA).”
GABA is the brain’s main inhibitory neurotransmitter. Zopiclone enhances its activity, inducing sedation. It acts on the same GABA-A receptor complex as benzodiazepines, which is why zopiclone carries a similar dependence profile despite not being a benzodiazepine by chemical classification.
The drug takes roughly one hour to begin working. The SmPC instructs patients to take it “only when certain of retiring for the night” with “uninterrupted sleep of about 7 to 8 hours.” This guidance exists because staying awake after taking zopiclone is precisely when the most serious adverse effects occur.
The NHS recommends prescribing it for just two to four weeks, because tolerance develops quickly and “your body can also become dependent on it.”
Why You Should Not Fight the Sedation
A common misconception is that if you stay awake after taking a sleeping tablet, the drug simply will not work. With zopiclone, this is not accurate. The brain becomes pharmacologically sedated regardless of whether the person intends to sleep.
What this creates is a state in which, evidence suggests, zopiclone’s effects on GABA receptors may suppress activity in regions involved in memory and decision-making, while the person is still physically mobile and awake. Zopiclone’s GABA-enhancing action affects the hippocampus (involved in memory), the prefrontal cortex (involved in decision-making and impulse control), and other regions involved in perception and emotion. Fighting the sedation does not restore these functions; it simply means the person is ambulatory while they are impaired.
Anterograde Amnesia: Why You May Not Remember What You Did
The most consistently documented effect of taking zopiclone and staying awake is anterograde amnesia. This is not the same as forgetting something that happened in the past. Anterograde amnesia means the brain cannot form new memories of events happening in the present.
The SmPC states explicitly that anterograde amnesia “especially” occurs “when sleep is interrupted or when retiring to bed is delayed after taking the tablet.” In practical terms, a person may have a coherent-seeming conversation, carry out activities, or make decisions during the period of drug activity and have no memory of any of it the following day.
This effect arises from zopiclone’s action on the hippocampus, the brain region most directly involved in consolidating short-term experiences into long-term memory. With GABA activity enhanced and hippocampal function suppressed, the brain processes what is happening around it but does not store it.
Anterograde amnesia can create real-world consequences: financial decisions made, communications sent, agreements entered into, all with no recollection. The person may feel accused of things they genuinely have no memory of, which can create serious confusion in relationships.
If you have experienced memory gaps after taking zopiclone, raise it with your GP. It does not mean something is permanently wrong with memory, but it is a signal that the current pattern of use needs to change.
Hallucinations and Disorientation
The NHS side-effects page for zopiclone lists seeing or hearing things that are not real (hallucinations) as a serious, though uncommon, side effect requiring medical attention. The SmPC similarly classifies them as rare psychiatric adverse reactions.
These hallucinations are more likely when the person is awake while the drug is active, rather than when they fall asleep normally. The SmPC also lists delusions and delirium in the same category of psychiatric reactions. For most people taking zopiclone as prescribed and going straight to sleep, these effects remain rare. The risk increases for people staying awake, taking higher doses, or combining zopiclone with alcohol.
If you experience hallucinations after taking zopiclone, speak to a doctor. It does not mean the experience is permanent, but it signals that the current pattern of use needs to change.
Complex Sleep Behaviours: Doing Things You Cannot Recall
One of the more serious documented effects of Z-drugs is complex sleep behaviour, a category of actions a person carries out while in a partially sedated state, with no memory of doing so. The SmPC lists these as having been reported in patients “who have taken zopiclone and were not fully awake” and states that treatment should be discontinued immediately if such behaviour occurs.
Documented examples include sleepwalking, sleep-driving, preparing and eating food, making phone calls, and having sex. These events may occur after the first dose or any subsequent dose. They are more likely when the person delays going to bed after taking the tablet, disrupts their sleep, or combines zopiclone with alcohol or other central nervous system depressants.
Research into the clinical and forensic toxicology of Z-drugs, published in a peer-reviewed review in PMC, documents cases including road traffic accidents attributed to sleep-driving in people who had taken zolpidem or zopiclone with no memory of the event. The forensic and personal safety implications are serious.
If you or someone you know has experienced episodes involving behaviour they cannot recall after taking zopiclone, discuss it with a GP promptly. There are approaches to managing insomnia that do not carry this risk profile.
Disinhibition, Aggression, and Risky Behaviour
The SmPC documents what it describes as “paradoxical reactions” to zopiclone, including restlessness, agitation, irritability, aggression, abnormal behaviour, and anger. These are more likely in elderly patients, but they are not exclusive to that group. Higher doses and combinations with alcohol significantly increase the risk.
The common thread across these effects is disinhibition. GABA-enhancing drugs suppress the prefrontal cortex, which handles impulse control and the evaluation of consequences. When that function is compromised, behaviour that would normally be filtered out may not be.
In practice, this can mean saying things that cause harm, making impulsive decisions, engaging in confrontations, or taking physical risks. People in this state may not feel impaired. They may feel unusually relaxed, which makes the situation more rather than less dangerous. The absence of a felt sense of intoxication does not mean the brain is functioning normally.
The SmPC acknowledges this risk explicitly, warning that zopiclone “should be used with extreme caution in patients with current or a history of alcohol, substance or drug abuse.” The drug’s potential to produce a disinhibited, sedated state is precisely what makes misuse outside its prescribed purpose a concern.
When Zopiclone Becomes More Than a Sleep Aid
Most people prescribed zopiclone take it as directed for a short course and do not develop dependence. But the drug has a documented misuse profile, and dependence can develop even within the therapeutic window.
The NHS is direct: tolerance develops within two to four weeks, at which point the medication is “unlikely to have the same effect.” For some people, this plateau prompts them to take higher doses, to take it outside of bedtime, or to seek it from multiple sources.
Signs that zopiclone may have become a problem include:
- Taking it outside the prescribed pattern, or without the intention of sleeping
- Needing a higher dose to get the same effect
- Anxiety, insomnia, or physical discomfort when a dose is missed
- Using it alongside alcohol or other substances to intensify the effect
- Feeling unable to sleep at all without it, even after more than a few weeks
The SmPC lists withdrawal symptoms that can occur on stopping: rebound insomnia, anxiety, tremor, sweating, agitation, confusion, and palpitations. Severe cases may in rare instances involve hallucinations or seizures. If dependence has developed, stopping suddenly is not the right approach. A medically supervised reduction is safer.
The Risks of Combining Zopiclone With Alcohol
Alcohol and zopiclone both enhance GABA activity and suppress central nervous system function. Taking them together does not produce a straightforward addition of the two effects; the combined suppression can be disproportionately severe.
The NHS common questions page for zopiclone states that combining zopiclone with alcohol “can make you go into a very deep sleep where it is difficult to wake up.” The SmPC states that concurrent use “is therefore not recommended” and that the central depressive effect is “enhanced.”
For someone staying awake after taking zopiclone, adding alcohol intensifies all of the effects described in this article. Anterograde amnesia and complex sleep behaviours become more likely; disinhibition is amplified.
There is a particular relevance to people with alcohol dependence. Insomnia is common in alcohol withdrawal and early sobriety, and zopiclone is sometimes prescribed for this reason. If drinking has not fully stopped, combining the two creates a significant safety concern. This is a conversation to have with a prescriber, not something to manage alone.
What to Do If You Are Concerned About Your Zopiclone Use
If you have recognised something in this article that reflects your own experience, speaking to your GP is the most important step you can take. People often delay this conversation because they are worried about being judged or having their prescription removed immediately. These concerns are understandable but generally not how it works in practice.
A GP can assess whether dependence has developed and help you reduce the dose gradually. Stopping zopiclone suddenly after regular use is not recommended because withdrawal symptoms can be significant. A supervised reduction is safer.
If the concern is more immediate, such as an episode of behaviour you cannot account for or something that felt frightening, contact your GP, NHS 111, or go to your nearest urgent treatment centre.
If you feel that zopiclone use has become entangled with other substances or underlying distress, that is also worth raising. Prescription drug dependence does not develop in a vacuum; addressing the context is part of recovering from it.
Getting Support for Prescription Drug Dependence: What Sierra Recovery Offers
Sierra Recovery is a small private residential clinic in the mountains of inland Andalucía, Spain, backed by PROMIS Clinics in the UK. We treat adults dealing with prescription drug dependence, including Z-drug and benzodiazepine-type dependencies.
Our prescription drug dependence treatment programme covers people who have become dependent on substances originally prescribed for a genuine medical need. Our benzodiazepine and Z-drug dependence programme addresses the pharmacological class to which zopiclone belongs.
Medical detox is doctor-supervised, with withdrawal managed gradually and safely. Our residential treatment programme follows detox with evidence-based therapy, including CBT, DBT, and trauma-focused approaches, in a small group setting.
The clinical team is English-speaking throughout, with aftercare continuing via PROMIS UK’s London-based sessions. For many UK clients, the combination of clinical standard, retreat setting, and accessible cost relative to UK private care makes Sierra a serious option worth considering.
Concerned about zopiclone or prescription drug use? Talk to our team in confidence. We answer questions about prescription drug dependence honestly, in English. PROMIS Clinics-backed care, medically supervised detox, residential programme in Andalucía, London-based aftercare. Speak to our team UK: +44 1202 653136 | Spain: +34 666 777 888 Confidential. English-speaking team. No obligation.
Sources
- NHS. “About zopiclone.” https://www.nhs.uk/medicines/zopiclone/about-zopiclone/
- NHS. “Side effects of zopiclone.” https://www.nhs.uk/medicines/zopiclone/side-effects-of-zopiclone/
- NHS. “Common questions about zopiclone.” https://www.nhs.uk/medicines/zopiclone/common-questions-about-zopiclone/
- medicines.org.uk. “Zopiclone 3.75mg film-coated tablets: Summary of Product Characteristics (SmPC).” https://www.medicines.org.uk/emc/product/10830/smpc
- Gunja N. “The clinical and forensic toxicology of Z-drugs.” J Med Toxicol. 2013;9(2):155-162. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC3657020/
Frequently Asked Questions
What happens if you take zopiclone and stay awake?
The drug continues to sedate the brain whether or not you sleep. Memory formation, impulse control, and perceptual processing are suppressed while you remain physically mobile. The most documented effects are anterograde amnesia, hallucinations, complex behaviours carried out without recollection, and disinhibition. The SmPC states anterograde amnesia occurs "especially when sleep is interrupted or when retiring to bed is delayed after taking the tablet."
Can zopiclone cause hallucinations?
Yes. The NHS lists hallucinations as a serious side effect, and the SmPC classifies them as a rare psychiatric adverse reaction. They are more likely when the person is awake while the drug is active, at doses higher than prescribed, or when combined with alcohol or other CNS depressants. If you experience hallucinations after taking zopiclone, speak to your GP.
Why does zopiclone cause amnesia?
Zopiclone enhances GABA activity, which suppresses the hippocampus, the brain structure most directly involved in forming new memories. The brain processes events while the drug is active but does not consolidate them into long-term memory. This is anterograde amnesia, and it is most likely when the person takes zopiclone and remains awake rather than going to sleep.
Is it dangerous to take zopiclone and not sleep?
Yes. The SmPC advises taking zopiclone only when certain of retiring for the night with about seven to eight hours available for sleep. Remaining awake increases the risk of amnesia, hallucinations, complex behaviours such as sleepwalking, and disinhibition. Physical mobility combined with impaired brain function is where most of the documented harm arises.
Can you become dependent on zopiclone?
Yes. The NHS states that the body can become dependent on zopiclone, which is why it is prescribed for no longer than two to four weeks. The SmPC confirms that "prolonged use may lead to drug dependence and addiction, even at therapeutic doses." Withdrawal symptoms can include rebound insomnia, anxiety, tremor, and sweating. In rare severe cases, seizures may occur, which is why stopping suddenly after regular use is not recommended.
What should I do if I have been taking zopiclone for longer than prescribed?
Speak to your GP as soon as possible. Your GP can assess whether dependence has developed and help you reduce the dose gradually and safely. Do not stop suddenly, as withdrawal symptoms can be significant. If your use has become entangled with other substances or underlying distress, raise that too. Treatment for prescription drug dependence is available and can be effective with the right support.
