Sleep Apnoea OSA Treatment: UK Options

Sleep apnoea OSA treatment covers a range of evidence-based options, from CPAP therapy and mandibular advancement devices to lifestyle changes and surgery. Obstructive sleep apnoea (OSA) is a common condition in which the airway repeatedly narrows or closes during sleep, disrupting breathing and reducing blood oxygen levels. Left untreated, it carries serious cardiovascular and metabolic risks. This article explains how OSA is diagnosed in the UK, what treatments are available on the NHS, how CPAP works, and what alternatives and lifestyle changes can help you manage the condition safely and effectively.

What is obstructive sleep apnoea and how is it diagnosed in the UK?

OSA is diagnosed in the UK via GP assessment, validated questionnaires such as STOP-Bang, and a home-based respiratory sleep study, with severity classified by the apnoea-hypopnoea index under NICE guideline NG202.

Obstructive sleep apnoea (OSA) is a common condition in which the muscles and soft tissues of the throat relax during sleep, causing the airway to narrow or close repeatedly and interrupting normal breathing. These episodes, known as apnoeas, can occur dozens or even hundreds of times per night, reducing blood oxygen levels and fragmenting sleep without the person necessarily waking fully. OSA affects people of all ages but is more prevalent in middle-aged and older adults, and in those who are overweight.

In the UK, diagnosis typically begins with a GP assessment. Your GP will ask about symptoms such as loud snoring, witnessed breathing pauses, excessive daytime sleepiness, and morning headaches. Validated questionnaires such as the Epworth Sleepiness Scale, STOP-Bang, or OSA-50 are commonly used in primary care to quantify daytime drowsiness and identify people who need further investigation. If OSA is suspected, your GP will refer you to a specialist sleep service or respiratory clinic.

Confirmation of OSA usually involves a sleep study. NICE guideline NG202 recommends home-based limited-channel respiratory polygraphy as the preferred initial investigation for most adults; home pulse oximetry alone may be used in some circumstances but is generally considered less informative.^[1][6] In more complex cases, a full in-laboratory polysomnography may be arranged. The severity of OSA is most commonly classified by the apnoea-hypopnoea index (AHI), which counts the average number of breathing interruptions per hour, though many UK services also use the oxygen desaturation index (ODI) and thresholds may vary between laboratories:

• Mild OSA: 5 to 14 events per hour

• Moderate OSA: 15 to 29 events per hour

• Severe OSA: 30 or more events per hour

NICE guidance (NG202) provides the framework for the investigation and management of OSA in adults, and your care pathway will generally follow this.

What treatment options are available for OSA on the NHS?

The NHS offers CPAP as first-line treatment for moderate to severe OSA, with mandibular advancement devices for mild to moderate disease, and surgical referral in selected anatomical cases, all arranged via your GP and local sleep service.

The NHS offers several evidence-based treatments for OSA, with the most appropriate option depending on the severity of your condition, your anatomy, and any coexisting health problems. NICE guideline NG202 recommends that all people with OSA receive information about lifestyle modifications alongside any device-based or surgical treatment.

For moderate to severe OSA, continuous positive airway pressure (CPAP) therapy is the first-line treatment recommended by NICE and is available through NHS sleep services. For mild to moderate OSA, or for people who cannot tolerate CPAP, a mandibular advancement device (MAD) may be offered. NICE recommends that MADs are custom-made, adjustable appliances fitted and monitored by a dentist or orthodontist; over-the-counter boil-and-bite devices are not recommended.^[1][2] In selected cases, particularly where anatomical factors such as enlarged tonsils are identified, surgical referral may be appropriate.

Access to NHS treatment is arranged through your GP and the local sleep service commissioned by your Integrated Care Board (ICB). Waiting times and the range of services available can vary between areas. If you are considering assessment or treatment through a private or online provider, it is important to choose one registered with the relevant regulator: the GPhC registers pharmacies in Great Britain, the CQC registers healthcare providers in England, and prescribers should be on the GMC register. Bolt Pharmacy is a GPhC-registered UK online pharmacy offering online weight-management consultations, with prescriber review and pharmacist support, which may be relevant where excess weight is contributing to OSA.

Regardless of the route you take, a thorough clinical assessment should always precede any treatment decision. Self-diagnosing or purchasing devices without professional guidance is not recommended, as untreated or inadequately treated OSA carries cardiovascular and metabolic risks.

How does CPAP therapy work and is it right for me?

CPAP delivers pressurised air through a mask to act as a pneumatic splint, keeping the airway open; it is most strongly indicated for moderate to severe OSA and for those with significant symptoms or cardiovascular comorbidities.

CPAP therapy works by delivering a continuous stream of pressurised air through a mask worn over the nose or nose and mouth during sleep, acting as a pneumatic splint that keeps the upper airway open and prevents the collapse that causes apnoeas. The pressure is set individually, either by a sleep specialist following titration or by an auto-adjusting (APAP) device that responds to changes in airway resistance throughout the night.

Several mask styles are available, including nasal masks, nasal pillow masks, and full-face masks covering the nose and mouth. Many modern CPAP machines also offer heated humidification and expiratory pressure relief features, both of which can improve comfort and tolerance. Your sleep team will help you find the combination that suits you best.

CPAP is highly effective when used consistently. Evidence consistently shows that regular use reduces daytime sleepiness, improves cognitive function, lowers blood pressure, and reduces the risk of road traffic accidents associated with excessive sleepiness.^[7][13] NICE recommends CPAP as the primary treatment for adults with moderate to severe OSA and for those with mild OSA who have significant symptoms or cardiovascular comorbidities.^[1][2]

Whether CPAP is right for you depends on several factors:

• Severity of OSA: CPAP is most strongly indicated for moderate to severe disease

• Symptom burden: Significant daytime sleepiness or impaired quality of life strengthens the case for CPAP

• Cardiovascular risk: People with hypertension, heart failure, or a history of stroke may gain additional benefit

• Tolerance: Some people find mask fit, noise, or pressure uncomfortable initially

NHS sleep services provide CPAP equipment, masks, and ongoing support, and will typically review adherence data to help optimise your therapy. Most people require a period of adjustment, and your sleep team can trial different mask styles and pressure settings to improve comfort. If you are struggling with CPAP, contact your sleep service rather than stopping treatment, as alternatives can be explored.

The DVLA requires drivers with OSA and excessive daytime sleepiness to notify them and to stop driving until symptoms are controlled. Your sleep team can advise on when it is safe to resume; further information is available on the GOV.UK DVLA guidance pages.

Lifestyle changes that can help reduce sleep apnoea symptoms

Weight loss is the most effective lifestyle change for OSA in people with overweight or obesity, with additional benefit from avoiding alcohol before bed, stopping smoking, positional therapy, and consistent sleep hygiene.

Weight loss is the single most impactful lifestyle change for people with OSA who are living with overweight or obesity, because excess adipose tissue around the neck and upper airway directly increases the tendency for airway collapse during sleep. Evidence cited in NICE guideline NG202 indicates that even a modest reduction in body weight can meaningfully reduce AHI scores and, in some cases of mild OSA, may lead to resolution of the condition.^[1][2] For people with more severe OSA, lifestyle changes complement rather than replace device-based treatment. NHS weight-management services can provide structured support, and your GP can advise on referral.

Beyond weight management, several other modifications have evidence supporting their benefit:

• Positional therapy: OSA is often worse when sleeping on the back (supine position). Validated positional therapy devices are available and are more reliable than improvised methods. If you are considering a positional aid, discuss the options with your sleep team.

• Alcohol and sedatives: Alcohol relaxes pharyngeal muscles and worsens airway collapse. Avoiding alcohol, particularly in the two to three hours before bed, is recommended. Sedating medicines, including benzodiazepines, Z-drugs, opioids, and some antihistamines, can have a similar effect; discuss any such medicines with your GP before making changes, as you should not stop prescribed medicines without medical advice.

• Smoking cessation: Smoking causes upper airway inflammation and increases OSA risk.^[17][18] NHS Stop Smoking services offer free support.

• Sleep hygiene: Maintaining a consistent sleep schedule and avoiding sleep deprivation can reduce the severity of symptoms, as sleep debt increases the depth of sleep stages during which OSA is most pronounced.

Your GP or sleep team can advise on which lifestyle changes are most relevant to your individual pattern of OSA.

Are there alternatives to CPAP for treating OSA?

Custom-made mandibular advancement devices are the main CPAP alternative for mild to moderate OSA, with surgical options such as hypoglossal nerve stimulation or bariatric surgery available for carefully selected patients.

Several alternatives to CPAP exist for people with OSA who cannot tolerate the device or who have mild to moderate disease, and NICE guidance acknowledges that treatment should be individualised. The most widely used alternative is a mandibular advancement device (MAD), a custom-made, adjustable oral appliance fitted and monitored by a dentist or orthodontist that holds the lower jaw slightly forward during sleep, increasing the space behind the tongue and reducing airway collapse. NICE recommends custom-made, titratable MADs for mild to moderate OSA and for people who prefer them to CPAP.^[1][2] They are available through NHS dental or orthodontic services in some areas, though access varies by ICB, and ongoing dental review is important.

Surgical options may be considered in specific circumstances:

• Tonsillectomy or adenotonsillectomy: Particularly relevant where enlarged tonsils are a primary anatomical cause, more commonly in children but occasionally in adults

• Uvulopalatopharyngoplasty (UPPP): Removal of excess soft palate tissue; outcomes are variable and patient selection is important

• Hypoglossal nerve stimulation: An implantable device that stimulates the nerve controlling tongue movement during sleep; available in a small number of specialist centres for carefully selected patients who have not responded to CPAP. UK availability is limited and access is subject to NICE Interventional Procedures Guidance and local ICB commissioning decisions. Discuss with your sleep specialist whether this is an option for you.

• Bariatric surgery: For people with severe obesity and OSA, weight-loss surgery can produce substantial and sustained improvements in AHI

Topical nasal decongestants may reduce nasal congestion but should not be used for more than seven days due to the risk of rebound congestion, and they have limited evidence for treating OSA itself. Positional therapy devices, as described in the lifestyle section, are a recognised adjunct. Any alternative treatment should be discussed with your sleep specialist, who can assess suitability based on your anatomy, AHI, and symptom profile.

What side effects and risks should I know about with OSA treatments?

CPAP commonly causes nasal dryness, mask discomfort, and aerophagia, while MADs can cause jaw soreness and minor dental changes; untreated OSA itself carries greater risks including hypertension, stroke, and road traffic accidents.

OSA treatments are generally safe, but each carries potential side effects that are worth understanding before you begin. CPAP therapy most commonly causes nasal congestion, dryness of the mouth and throat, skin irritation or pressure marks from the mask, and aerophagia (swallowing air, which can cause bloating). A heated humidifier attached to the CPAP machine reduces mucosal dryness considerably. Mask leaks are a common early problem that usually resolves with mask refitting; a chin strap may help where mouth breathing causes air to escape. Claustrophobia and difficulty exhaling against pressure affect a minority of users; your sleep team can adjust settings or trial a bilevel device (BiPAP) if needed. It is advisable not to use second-hand CPAP equipment, as hygiene cannot be assured and pressure settings require individual clinical review.

Mandibular advancement devices can cause temporary jaw discomfort, tooth soreness, and increased salivation, particularly in the first few weeks of use. Longer-term use has been associated with minor changes in dental occlusion in some people, which is why ongoing dental review is recommended.^[19][20] People with significant temporomandibular joint problems may not be suitable candidates.

Surgical treatments carry the risks associated with any procedure under general anaesthesia, including bleeding, infection, and anaesthetic complications. Outcomes from palatal surgery for OSA are variable, and the procedure does not reliably cure the condition.

Untreated OSA itself carries significant risks, including increased likelihood of hypertension, type 2 diabetes, atrial fibrillation, stroke, and road traffic accidents due to excessive daytime sleepiness.^[14][15] In the UK, the DVLA requires drivers to notify them if they have OSA with excessive sleepiness; Group 1 and Group 2 licence holders have different notification requirements, and further detail is available on the GOV.UK DVLA guidance pages. Driving must cease until symptoms are controlled.

If you experience any new or worsening symptoms during treatment, contact your GP or sleep service. For urgent concerns such as chest pain or severe breathlessness, call 999. For non-emergency advice, NHS 111 is available around the clock. Suspected adverse reactions to any medical device or treatment can be reported to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

Scientific References

1. Obstructive sleep apnoea/hypopnoea syndrome and obesity hypoventilation syndrome in over 16s (NG202).
2. NG202 Chapter 1: Obstructive sleep apnoea/hypopnoea syndrome.
3. NG202 Terms used in this guideline.
4. NG202 Rationale and impact.
5. NG202 Evidence: Demonstration of efficacy.
6. Automated home testing devices for diagnosing obstructive sleep apnoea (HTG735): Topic description.
7. Continuous positive airway pressure for the treatment of obstructive sleep apnoea (TA139): Evidence and interpretation.
8. Hypoglossal nerve stimulation for moderate to severe obstructive sleep apnoea (IPG598).
9. Hypoglossal nerve stimulation for moderate to severe obstructive sleep apnoea (HTG455).
10. Excessive sleepiness and driving.
11. Motorists warned about dangers of untreated obstructive sleep apnoea syndrome.
12. Sleep apnoea.
13. Risk of traffic accidents in patients with sleep-disordered breathing.
14. Continuous positive airways pressure for obstructive sleep apnoea in adults.
15. Continuous positive airways pressure for obstructive sleep apnoea in adults.
16. Type III home sleep testing versus pulse oximetry: is the respiratory disturbance index better than the oxygen desaturation index to predict the apnoea-hypopnoea index measured during laboratory polysomnography?.
17. Interaction between smoking and obstructive sleep apnea.
18. Where there is smoke…there is sleep apnea: exploring the relationship between smoking and sleep apnea.
19. The Occlusal Side Effects of Mandibular Advancement Device Therapy in Adult Sleep Apnea Patients: A Systematic Review.
20. Occurrence of Temporomandibular Disorders among patients undergoing treatment for Obstructive Sleep Apnoea Syndrome using Mandibular Advancement Device: A Systematic Review.

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