Enovid — sold in the US as NoWonder™ — uses a dual-chamber sprayer that generates nitric oxide at the moment of use. This page explains how that works and what each ingredient does.
What the product is
NoWonder™ is a nasal cleanser developed by SaNOtize Research & Development, a Canadian biotechnology company. It is used to cleanse and refresh the nasal passages as part of a daily nasal care routine. The same formulation is sold outside the US as Enovid™.
Unlike a decongestant or a steroid spray, it is not absorbed systemically and does not act on the body — it works on the surface of the nasal lining, in the space just inside the nose.
The dual-chamber sprayer
The bottle holds two separate liquid components. They are kept apart until the moment you press the pump, when the sprayer draws from both chambers at once and mixes them on the way out.
This is why the product behaves differently from an ordinary nasal spray:
- It needs priming. Before first use, the pump has to be pressed 10–12 times with the bottle upright, until a steady stream appears. This fills both channels so each subsequent spray delivers a consistent mix.
- It delivers a liquid, not a mist. The output is somewhere between droplets and a jet — closer to a rinse than an aerosol. This is by design, and helps the solution spread across the nasal lining rather than dispersing into the air.
- It must be held vertically. Tilting the bottle can stop one of the chambers drawing correctly.
Step-by-step instructions are on our How to Use page.
Nitric oxide, generated at the moment of use
Nitric oxide is not stored in the bottle. It is produced when the two components combine during spraying — which is why it does not appear in the ingredient list.
Because nitric oxide is a gas, it is present only very briefly before dissipating naturally. It is not something that builds up or lingers in the nasal passages.
Nitric oxide itself is a small molecule that occurs naturally in the human body, including in the lining of the nose and paranasal sinuses. It has been studied extensively in scientific literature across many fields of medicine and physiology.
What each ingredient does
| Ingredient | Role in the formulation |
|---|---|
| Purified water (Aqua) | The base of the solution |
| Sodium chloride | Common salt — gives the solution a saline base |
| Sodium nitrite | One half of the dual-chamber pair; the source of the nitric oxide generated on spraying |
| Citric acid | The other half of the pair; also adjusts the pH of the solution |
| Hypromellose (HPMC) | A widely used thickening and moisturising agent found in many nasal and eye products; gives the liquid body so it spreads evenly and stays in contact with the nasal lining rather than running straight out |
| Benzalkonium chloride | A preservative used in many nasal sprays to keep the solution stable in a multi-use bottle |
The product contains no steroids and does not cause drowsiness. Full details on our Ingredients page.
Why it feels different from other nasal sprays
Two things surprise people on first use, and both are normal:
A mild, temporary tingling. This varies from day to day depending on nasal hydration and individual sensitivity. The label advises stopping use if you feel significant burning or irritation, or if a burning sensation persists for more than 5 minutes after use.
Some run-off. Because the output is a liquid rather than a fine mist, a little can run back out of the nose or reach the back of the throat. Holding the sprayer vertically and aiming slightly away from the centre of the nose reduces this. Do not swallow the solution.
More on both in our FAQ.
Important note: In the United States, this product is sold as NoWonder™, a cosmetic nasal cleanser. No drug or disease-prevention claims are made for NoWonder™ in the US. The same formulation is registered as a medical device (Enovid™) in Israel, Germany, South Africa and several Asian countries, and as a prescription drug (FabiSpray™) in India; the regulatory status and permitted claims differ in each of those markets.
