Nasal sprays have gained attention in the public eye in recent years as a way for consumers to add an extra layer of protection against viruses and bacteria. These products are designed to cleanse the nasal passages – which is where many airborne germs land – with the aim of reducing the risk of infection. Two popular approaches are povidone-iodine nasal cleansers like Nasodine and nitric oxide-releasing sprays like NOWONDER™ (previously brand-named Enovid in some regions). Below, we’ll explore the claimed benefits of Nasodine povidone-iodine nasal sprays, how it works, the safety and regulatory status, and the experience of users. We’ll also provide a direct comparison with NOWONDER™, looking at how the two differ in ingredients, usage, effectiveness, and value for consumers.
It’s important to understand up-front that we sell both of these products, so this is not a promotion for one over the other. There are no claims that they are a therapeutic solution that can prevent or cure any condition. Both are sold over-the-counter without prescription, which means that they do not have to be certified for safety or effectiveness by authorities like the FDA in the United States, or equivalent organizations in other countries.
All references to the ingredients, actions and effects of Nasodine and NOWONDER have been taken directly from the respective company’s own published material and has not been checked or validated by us. If you want to learn more about the products, please visit the Nasodine and NOWONDER company website pages. We also cannot cite independent testing of the stated actions and benefits, so we are not able to independently verify the claims made by the manufacturers. Our own experience over several years of sales to many customers has been that they have generally been satisfied with the outcomes of using both Nasodine and NOWONDER™, as evidenced by the positive reviews posted on our website (665 reviews – Trust score 4.9/5) and the fact that many buyers have come back with orders for refills.
Nasodine Povidone-Iodine Nasal Spray
Povidone-Iodine (PVP-I) is a well-known antiseptic that has been used in hospitals for decades on skin and mucous membranes. Nasodine is sold as a nasal cleanser, and its stated purpose is to act as an early-intervention to diminish the threat of infections by airborne bugs that can lead to common cold symptoms, head colds, and sinus discomfort. Nasodine nasal spray is administered by a simple pump, delivering diluted 0.5% PVP-I solution as it is applied to the nostrils.
The recommended use is before or after potential exposure – for instance, using the spray before going into crowded public spaces or after coming home, to neutralize pathogens one might have breathed in. Always follow the instructions on the product’s information page and website.
How Nasodine works
Povidone-iodine is a broad-spectrum antiseptic. In simple terms, it releases iodine, a chemical that quickly kills microbes by destroying their proteins and cell structures.
When you spray the weak PVP-I solution into your nose, the iodine coats the nasal lining and inactivates viruses and bacteria on contact. There are laboratory studies that show that even at the low concentration of 0.5% PVP-I, iodine can neutralize viruses like SARS-CoV-2 within seconds. Importantly, iodine works very quickly. The expected action of iodine if a pathogen is breathed in and lands on the nasal mucosa is to neutralize it before it can multiply and cause infection.
NOWONDER™ Nasal Cleanser
NOWONDER™ is the brand name of a nitric oxide-releasing nasal spray developed by the Canadian company SaNOtize. It has been marketed in various countries under different names: in Israel and some regions as Enovid, in Canada as VirX. It is now universally rebranded as NOWONDER™ Nasal Cleanser. Research has shown that the body itself produces bactericidal nitric oxide (NO) in response to invading bacteria. NOWONDER can act as a supplementary source of NO to promote nasal hygiene. Each bottle (25 mL) provides roughly a one-month supply if used as directed (2 sprays per day)
How NOWONDER™ works
NOWONDER™ Nasal Cleanser generates a small burst of nitric oxide (NO) with each dose. Note that the spray doesn’t itself contain gaseous NO. Instead, the bottle contains a solution of sodium nitrite and a mild acid (citric acid) along with stabilizers. When you activate the spray, these components mix and a chemical reaction produces a tiny amount of nitric oxide gas right there in your nostril.
Nitric oxide is a natural compound that the body produces in the nasal cavities (sinuses) as a defense against invading pathogens. NOWONDER™ is designed to boost that natural defense by releasing an extra pulse of NO when sprayed. Published research has shown that nitric oxide can disrupt the membranes of bacteria and many kinds of viruses (both RNA and DNA viruses) on contact.
Comparison: Nasodine vs. NOWONDER™
A side-by-side comparison highlighting the key differences and similarities between Nasodine Nasal Spray and NOWONDER™ Nasal Cleanser:
Nasodine Source: Manufacturer documentation | NOWONDER™ Source: Manufacturer documentation | |
Active Ingredients | 0.5% povidone-iodine (PVP-I) | Sodium nitrite and citric acid, which react to release nitric oxide (NO) |
Mechanism | Delivers iodine, a chemical antiseptic that kills germs on contact by disrupting their proteins and membranes. | Releases a small amount of nitric oxide with each spray |
Claimed benefits | Intended to coat the lining of the nasal cavity with iodine | Intended to clean and flush the nasal passages |
Recommended usage | Best use is before or immediately after exposure to potentially infective environments | Regular (once or twice daily) dosing helps flush the nasal lining |
Safety | Stated to be generally safe for use in adults and children 12 and older. Use of any iodine-based products is contraindicated for people with thyroid problems or a known allergy to the chemical, and pregnant or breastfeeding women should check with a doctor before use. | Stated to be generally safe for use in adults and children over the age of 6. |
Side effects | Minimal, with mild and temporary nasal irritation or dryness, and may cause slight brownish discoloration of mucus. | Minimal, with possible mild stinging in the nose immediately after a dose |
Stop use and see a doctor if any nosebleeds, severe irritation or persistent symptoms occur. | ||
Regulatory status | Over-the-counter antiseptic. Does not have to have official approval. The manufacturer makes no explicit disease-prevention or curative claims | Over-the-counter medical device. Does not have to have official approval. The manufacturer makes no explicit disease-prevention or curative claims |
Convenience | Simple to use pump spray. | Simple to use pump spray. |
Cost (at date of publication) | $25 | $39, with discounts available on multiples |
In summary, both Nasodine povidone-iodine nasal sprays and NOWONDER™ nitric oxide nasal cleanser spray serve a similar purpose – intended to cleanse the nasal cavity and reduce the risks that come from exposure to infectious pathogens. Both can be considered by well-informed consumers as part of a personal health strategy, especially during cold and flu season or in pandemics. It’s important to keep realistic expectations: these sprays are adjuncts to, not replacements for, other precautions. But used properly, they offer a promising way to cut down the germ count in that critical passage into your airway – the nose – where so many infections begin.
