Here’s a scenario we take seriously at the pharmacy counter: someone exhausted for months, convinced they have insomnia, hoping for a sleeping tablet — whose partner mentions the snoring and the gasping. That pattern isn’t insomnia. It may be obstructive sleep apnoea, and a sedative is close to the worst thing for it.
What sleep apnoea is
In obstructive sleep apnoea (OSA), the muscles of the throat relax too much during sleep, repeatedly narrowing or closing the airway. Breathing pauses — sometimes hundreds of times a night — and each pause ends with a brief arousal as the brain jolts the airway back open. You rarely remember these arousals; you just wake shattered.
The symptoms to recognise
- Loud snoring, especially with pauses, gasps or choking sounds (often reported by a partner);
- Unrefreshing sleep and severe daytime tiredness despite “enough” hours;
- Morning headaches and dry mouth;
- Poor concentration, irritability, low mood;
- Nodding off in the day — in meetings, in front of the TV, or dangerously, while driving.
Risk rises with weight, age, a thicker neck, alcohol use and family history — and in women it climbs after menopause, when it’s frequently missed because the snoring can be quieter (see menopause and sleep).
Why zopiclone makes apnoea worse
Zopiclone relaxes muscles — including the throat muscles whose over-relaxation causes apnoea — and it raises the arousal threshold, meaning the brain is slower to trigger the life-saving wake-up that reopens the airway. The result: pauses become longer, more frequent and deeper. This is why severe sleep apnoea is a contraindication — zopiclone shouldn’t be prescribed at all — and why milder or undiagnosed apnoea calls for real caution. If you have apnoea symptoms and are taking any sedative, raise it with your GP promptly. And never add alcohol, which does the same things again on top.
The treatment that actually works
OSA is very treatable — but with the right tools. Diagnosis usually involves a simple home sleep study arranged via your GP. Treatment may include CPAP (a quiet pump and mask that holds the airway open — dramatically effective for moderate-to-severe OSA), a mandibular advancement device for milder cases, weight management support, and cutting evening alcohol. People who start CPAP after years of “insomnia” often describe the first refreshed morning as life-changing.
Driving: a legal note
Excessive daytime sleepiness that affects driving must be taken seriously: you must not drive while dangerously sleepy, and confirmed OSA with daytime sleepiness must be reported to the DVLA — though treatment normally allows you to keep driving. Untreated, drowsy driving with OSA is a major crash risk.
Frequently asked questions
How do I know if I have sleep apnoea or just insomnia?
Insomnia is difficulty getting or staying asleep; apnoea typically involves loud snoring with pauses or gasps, unrefreshing sleep despite enough hours, and daytime sleepiness. A partner’s report and a home sleep study settle it.
Can I take zopiclone if I have mild sleep apnoea?
Only with genuine caution and a prescriber who knows about the apnoea — severe OSA rules zopiclone out entirely. Sedatives relax the airway further and blunt the brain’s rescue arousals, deepening the problem.
Do I have to tell the DVLA about sleep apnoea?
You must not drive while excessively sleepy, and confirmed OSA with daytime sleepiness must be reported to the DVLA. Effective treatment such as CPAP normally allows you to continue driving.
Does losing weight cure sleep apnoea?
Weight loss can significantly improve or sometimes resolve OSA, but not always — airway anatomy matters too. CPAP or a dental device treats it effectively in the meantime; discuss the combination with your GP.
Questions about your sleep or your medicines? Speak to one of our pharmacists — advice is free and confidential. If you already have a prescription, you can nominate our pharmacy to dispense and deliver it.
This article is general health information based on NHS and BNF guidance. It is not medical advice, and it is not an advertisement for a prescription-only medicine. Zopiclone is available only on prescription in the UK and cannot be purchased from this website. Always follow your prescriber’s instructions and read the patient information leaflet. If you need urgent help call NHS 111; in an emergency call 999. [Clinical review placeholder — reviewed by NAME, Superintendent Pharmacist, GPhC reg. NUMBER, on DATE.]