Serenz Allergy Relief CO₂ Spray Review: A Drug-Free Option for Nasal Allergy Symptoms
Editor's Note (2026): This review is based on my experience using Serenz Allergy Relief in 2017. I've updated the article to improve readability and SEO while preserving my original thoughts and experience.
I've struggled with sinus problems for as long as I can remember.
My right nostril has a habit of becoming completely blocked, which often leaves me feeling uncomfortable and can sometimes lead to those horrible sinus headaches that seem impossible to ignore.
Over the years I've tried all sorts of things to help, from nasal decongestant sprays to keeping a bottle of Olbas Oil close by whenever my symptoms flare up.
So, when I was asked if I'd like to try Serenz Allergy Relief, I was really interested to see whether it would offer something different.
What Is Serenz Allergy Relief?
Serenz is a drug-free treatment designed to relieve nasal allergy symptoms using carbon dioxide (CO₂) rather than medication.
Unlike many allergy treatments, it doesn't contain antihistamines or steroids and is designed to provide fast relief without causing drowsiness.
It's intended to help relieve common allergy symptoms including:
Nasal congestion
Sneezing
An itchy nose
A runny nose
This makes it suitable for people who experience hay fever or other nasal allergies and are looking for an alternative approach.
How Does Serenz Work?
The Serenz device is handheld and slightly larger than a typical nasal spray.
Using it is straightforward. You place the nozzle into one nostril, press the button and allow the carbon dioxide to flow for around ten seconds. During this time you're advised either to breathe through your mouth or briefly hold your breath.
The same process is then repeated in the other nostril if needed.
The device can be used several times throughout the day, following the manufacturer's instructions.
My Experience Using Serenz
I'll be honest, the sensation was quite different from anything I'd tried before.
If you're used to traditional nasal sprays, Serenz feels a little unusual at first. It isn't unpleasant, just different.
I noticed that it made my eyes water slightly during use, but that only lasted a few moments.
The thing that impressed me most was how quickly my nose began to feel clearer afterwards.
Although I only used it over a relatively short period for this review, I found it helped relieve my nasal congestion and made breathing through my nose much more comfortable.
For someone who regularly experiences blocked sinuses, that was a welcome improvement.
What I Liked
After trying Serenz, these were the things that stood out to me:
Drug-free allergy relief.
Easy to use.
Quick to relieve nasal congestion.
Doesn't cause drowsiness.
A useful alternative to traditional nasal sprays.
Would I Recommend Serenz?
If you regularly struggle with nasal allergy symptoms or hay fever and you're looking for a non-medicated option, I think Serenz is worth considering.
Everyone responds differently to allergy treatments, but I found it helped clear my blocked nose quickly and made me feel much more comfortable.
Although it feels a little unusual the first few times you use it, I soon became accustomed to it and appreciated having another option available alongside the products I already used.
Available only at Weldricks online and with an RRP of £19.90, Serenz is a good alternative.
Serenzis not suitable for women who are pregnant or breastfeeding.
Disclosure: I received Serenz Allergy Relief for the purpose of this review in 2017. As always, all opinions are entirely my own and reflect my genuine experience at the time. This article has been updated for readability and SEO while preserving my original review.
Frequently Asked Questions
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Serenz is a drug-free device that uses carbon dioxide (CO₂) to help relieve nasal allergy symptoms such as congestion, sneezing and a runny nose.
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No. Although it's used in the nostrils, Serenz delivers carbon dioxide rather than medication or liquid spray.
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Serenz is designed to help relieve nasal symptoms commonly associated with hay fever and other allergies, including congestion, sneezing and an itchy nose.
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No. As it doesn't contain antihistamines, it isn't intended to cause drowsiness.
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