Short answer
A few things genuinely reduce simple snoring, and they are not evenly matched. Roughly in order of evidence: sleeping off your back, moving alcohol away from bedtime, getting a blocked nose diagnosed rather than worked around, addressing weight where it is genuinely a factor, and a dentist-fitted mandibular advancement device, the strongest non-CPAP option of the lot. None treats obstructive sleep apnoea. If your snoring is loud and habitual, if anyone has seen you stop breathing, gasp or choke in your sleep, or if you wake unrefreshed however long you were in bed, the next step is assessment rather than a purchase. Looking for a way around a machine is not the same as not needing one.
EIVOI sells two cheap over-the-counter products in this category. They sit near the bottom of the list below, where the evidence puts them.
Snoring, and snoring as a symptom
Snoring is soft tissue vibrating in a partly narrowed upper airway, and plenty of people do it with nothing wrong with their breathing. In obstructive sleep apnoea the same airway does not merely narrow, it closes, repeatedly, and the arousals that reopen it are too brief to remember. From the inside, both feel like an ordinary night with noise.
So the distinction cannot be made from symptoms alone, by you or by this page. What can be said is which features clinicians take seriously, and NHS guidance on snoring names the same cluster as the wider literature:
- Loud, habitual snoring, particularly if broken by silences
- Witnessed pauses in breathing, gasping or choking, usually noticed by a bed partner, and the most specific sign here
- Waking unrefreshed month after month, whatever the hours
- Morning headaches, or a persistently dry mouth and sore throat
- Falling asleep unintentionally in the day, above all at the wheel
None confirms anything alone. Together they are the pattern investigated with a sleep study, and sleep apnoea and morning tiredness sets out what that involves. Nothing here treats sleep apnoea at any severity, and using any of it instead of finding out is how people lose years.
One reframe, since it is why many people are here at all: being assessed does not commit you to CPAP. Oral appliances and positional treatment are real routes too, chosen from your results. Assessment is how you find out whether you can avoid a machine.
Sleeping off your back
Back-sleeping lets gravity pull the tongue and soft palate towards the back of the throat, which is why snoring and breathing events cluster in that position for many people, and why sleeping on your side heads the NHS self-help list.
The strongest evidence sits in positional obstructive sleep apnoea rather than ordinary snoring, so read across with caution. A 2019 Cochrane review by Srijithesh and colleagues pooled eight studies covering 323 participants. Against no treatment, it cut the apnoea-hypopnoea index by roughly 7.4 events per hour. Against CPAP it lost, with CPAP reducing the index by about 6.4 events per hour more, though in one study adherence ran about two and a half hours per night higher. Certainty was low to moderate, on short trials. That makes it real but second-line, and every method, from tennis balls to belts and pillows, depends on keeping it up for years rather than a fortnight.
Alcohol in the evening
Clearest mechanism, least appeal. Alcohol relaxes the muscles holding the upper airway open and raises the threshold at which you rouse from a breathing problem. Kolla and colleagues, in Sleep Medicine Reviews in 2018, pooled 14 studies covering 422 people and found the apnoea-hypopnoea index rose after alcohol by a weighted mean difference of 2.33 events per hour overall, and 4.20 in people who snore, with mean oxygen saturation falling. Burgos-Sanchez and colleagues, in Otolaryngology–Head and Neck Surgery in 2020, pooled 13 sleep-study trials and found the same direction: the index up 3.98 events per hour, lowest oxygen saturation down 2.72 per cent.
No trial establishes a cut-off hour, so this page will not invent one. The effect comes from alcohol being in your system as you fall asleep, so the drinks closest to bed are the lever. Relatedly, alcohol is one reason people sleep through things they would normally wake for.
The nose, and finding out why it is blocked
A blocked nose contributes indirectly, by pushing you into mouth breathing and increasing the suction that pulls the airway shut behind it. Clearing it can help, and the important word is diagnosed rather than cleared: allergic rhinitis, chronic sinusitis, a deviated septum, polyps and enlarged turbinates cause the same blockage and have entirely different treatments. NHS guidance makes the treatment offered depend on the cause found, so persistent blockage, especially one-sided or year-round, deserves an appointment rather than an indefinite workaround.
Mandibular advancement devices, fitted by a dentist
The best-evidenced option here, and the one almost nobody searches for. The device holds the lower jaw slightly forward, pulling the tongue base with it and enlarging the airway.
The 2015 clinical practice guideline from the American Academy of Sleep Medicine and the American Academy of Dental Sleep Medicine recommends oral appliances rather than no treatment for adults asking for help with primary snoring, and is specific about how: a custom, titratable appliance in preference to non-custom devices, fitted by a qualified dentist once a sleep physician has established what is being treated, with follow-up from both to confirm it works and to watch for bite changes.
Custom and titratable distinguishes a fitted, adjustable appliance from the boil-and-bite versions sold online, and the follow-up exists because these devices move teeth and can change how they meet. Private fitting is not cheap, which is no reason to substitute a mail-order copy.