You recognise the のどぬ～る (Nodonuuru) name, listed as NODOGLE in Kobayashi’s English product information, but the Japanese drugstore shelf has several similar boxes. Standard B and EX Cool are iodine throat-disinfection sprays. Nightect uses an anti-inflammatory ingredient plus CPC instead. Start with that difference, then compare the sensation you prefer. This guide also walks through opening the nozzle and actually using the spray.
I’m Irene, a Taiwanese pharmacist working in Japan.
Let’s read the full names on these three boxes, then look at the nozzle together. “EX” and “bedtime” are useful clues, but neither tells you the whole story.
Three things to check at the shelf
- Looking for the familiar iodine disinfectant? Compare B and EX Cool. Their iodine concentration is identical; EX does not establish stronger treatment.
- Want to compare a formula for inflammation, pain and swelling? Nightect contains anti-inflammatory azulene plus antiseptic CPC. Its more adhesive formulation is another point of difference.
- Pregnant, breastfeeding, buying for a child, or living with thyroid disease? Read the restrictions first. B and EX Cool have specific do-not-use conditions.
Three similar boxes, two different types of formula
Iodine disinfectant | 15 mL / 25 mL
のどぬ～るスプレー
Standard B. The front says スプレー; the registered product name is のどぬーるスプレーB.
Its active ingredient is iodine 0.5 g per 100 mL. The labelled indication is throat disinfection. To replace your familiar standard spray, check B and the pack size.
Inactive ingredients include menthol, ethanol, D-sorbitol and flavouring. Standard B also contains menthol, so it is not a cooling-free formula.
Cooling-focused version | 15 mL
のどぬ～るスプレー EXクール
Look for the full EXクール name rather than relying on blue packaging.
It also contains iodine 0.5 g per 100 mL, with the same throat-disinfection indication.
Kobayashi’s account of the range’s development describes EX Cool as a version with increased cooling sensation. Consider it if that is your preference; feeling cooler does not establish greater antiseptic effect or faster recovery.
Anti-inflammatory + CPC | 15 mL
のどぬ～る ナイテクト
Look for ナイテクト (Nightect). It is a different formula, rather than a bedtime dose of B.
Per 100 mL: sodium azulene sulfonate hydrate 0.02 g, an anti-inflammatory ingredient, and cetylpyridinium chloride hydrate (CPC) 0.3 g, an antiseptic. It contains no iodine.
Labelled uses include pain, swelling, roughness, discomfort and hoarseness due to throat inflammation, plus stomatitis. Kobayashi highlights its thicker, high-adhesion formulation.
Two shopping situations that help narrow the choice
- “I want the standard spray I bought before.” Look for B. If you would prefer more noticeable cooling, compare EX Cool. The iodine amount is the same, so there is no need to move to EX simply because of its name.
- “I want to compare a spray containing an anti-inflammatory ingredient for a sore, swollen throat.” Nightect is the relevant option among these three. Its azulene-containing formula differs from B and EX; your symptoms and restrictions still matter.
Nightect can be used during the day according to its instructions. Its directions say an appropriate amount several times daily, and Kobayashi’s FAQ says it can be used when symptoms occur. Bedtime is a highlighted use occasion, not a once-nightly-only dose or a reason to pair B by day with Nightect at night.
Opening the nozzle and spraying: what to do
The official instructions for all three use the same sequence: rotate the base, remove the little cap, aim and spray. These manufacturer illustrations are accompanied by English explanations.
Do not expect a perfume-like cloud. The standard-spray FAQ describes a straight stream rather than a mist, which makes aiming at the affected area important.
- Set the nozzle horizontally. Hold the bottle with the nozzle at its side and rotate the nozzle at the base. The additional standard-spray how-to says the tips of the triangular marks should face each other when viewed from above.
- Remove the small nozzle cap. Support the base with one hand while removing the cap with the other. Keep the nozzle horizontal, place it in the mouth and aim towards the affected throat area.
- Gently breathe out while pressing. Use an appropriate amount, with 2–3 sprays per use as a guide. Do not breathe in while spraying: liquid may enter the bronchi or lungs. The manufacturer suggests tilting your head slightly upwards; use a mirror if aiming is difficult.
- No liquid on the first press? Follow the priming instruction to press repeatedly until liquid comes out. Do not poke the nozzle with a needle. After use, replace the cap, return the nozzle to its original position and store upright.
A small tip from Irene: Find the nozzle base and its little cap before your first use. The key action to remember is “press while gently breathing out”. If a child cannot coordinate this, ask a pharmacist for a suitable option rather than forcing the spray.
How often can you use it?
The labelled dose is an appropriate amount several times daily. For B and Nightect, Kobayashi’s FAQs recommend up to 5–6 uses a day, with 2–3 presses per use as a guide. For EX Cool, follow its labelled several-times-daily directions; its official how-to also gives 2–3 sprays per use as a guide. These are not targets you must reach. The B FAQ also limits use to six days. For all three, stop and seek advice if symptoms have not improved after 5–6 days.
Age, pregnancy and thyroid conditions: check the version
Do not use B or EX Cool if:
- The user is under two years old
- You are pregnant, may be pregnant or are breastfeeding
- You have thyroid disease
- You have had an allergic reaction to the product, its ingredients or iodine, including povidone-iodine
Both also prohibit prolonged continuous use and large amounts. These are do-not-use instructions; reducing the dose does not remove them.
Nightect has no iodine, but individual circumstances still matter
Kobayashi’s Nightect FAQ says it can be used during pregnancy and breastfeeding, and recommends telling your doctor at the next visit that you are using it. For any of these three, consult a doctor, dentist, pharmacist or Japanese registered medicine salesperson first if you are receiving medical/dental treatment, have a history of medicine allergy or have severe oral ulceration. With thyroid disease, avoid B/EX Cool and explain your condition and current medicines when discussing an iodine-free option.
B and EX Cool explicitly prohibit use under age two. The current Nightect leaflet requires adult guidance and supervision for children but gives no numerical minimum age. Ask a pharmacist before choosing it for a young child; an omitted age number is not clearance to use it on a baby, and the child must be able to cooperate with spraying.
When to stop
- All three: stop and seek advice with the package for possible adverse reactions such as rash, redness, itching or nausea. Stop if there is no improvement after 5–6 days.
- B/EX Cool: oral burning, irritation or roughness also require stopping and seeking advice. Sudden breathing difficulty, hives, hoarseness, palpitations or confusion after use may indicate a serious allergic reaction: seek medical care immediately.
- Nightect: stomach discomfort is another reason to stop and seek advice. Stop if oral irritation persists or gets worse.
Avoid the eyes. If exposed, rinse promptly with water or lukewarm water; seek eye care for severe symptoms. Swallowing a large amount requires immediate medical attention. B/EX are for the throat only; Nightect is for spray application. None is a liquid medicine to drink.
Before putting it in your travel bag
Cap firmly, store upright in a cool, dry place away from direct sun, and keep out of children’s reach. Use the supplied plastic bag when carrying it. Do not decant or use past expiry. EX Cool also warns to keep away from flames. Rinse medicine from clothing promptly with water.
At the counter, use the full name:
「のどぬ～るスプレーのEXクール、15mLはありますか？」
“Do you have NODOGLE Spray EX Cool, 15 mL?” To check suitability, also give the user’s age, symptoms, pregnancy/breastfeeding status and relevant medical history. That is clearer than asking for “the blue box”.
Questions before buying and spraying
Is EX Cool stronger than standard B?
Both contain iodine 0.5 g per 100 mL and have the same throat-disinfection indication. EX Cool focuses on cooling sensation. Neither the EX name nor a cooler feeling establishes stronger treatment.
Is Nightect only for bedtime?
No. Its directions allow an appropriate amount several times daily, and Kobayashi says it can be used when symptoms occur. Bedtime is a highlighted occasion. Its azulene-plus-CPC formula differs from the iodine formula in B and EX Cool.
Should I breathe in or hold my breath when spraying?
The manufacturer instructs you to aim at the affected area and spray while gently breathing out. Do not breathe in while spraying, because liquid may enter the bronchi or lungs. Use 2–3 sprays as a guide.
Can I use these while pregnant or breastfeeding?
B and EX Cool must not be used. Kobayashi’s Nightect FAQ says it can be used during pregnancy and breastfeeding and recommends telling your doctor at the next visit. Consult first if receiving medical treatment, with a history of medicine allergy or severe oral ulceration.
Can children use them?
B and EX Cool must not be used under age two. Nightect’s current leaflet requires adult guidance and supervision but gives no numerical minimum age. Ask a pharmacist before choosing it for a young child; absence of an age number does not establish infant suitability. Do not force use if the child cannot cooperate with the breathing and spraying steps.
Can I keep using a spray if my throat is not better?
Do not use these continuously long-term. Stop and seek advice with the package if symptoms have not improved after 5–6 days; the standard-spray FAQ also limits use to six days. Stop sooner for suspected adverse reactions, and seek immediate medical care for serious allergic symptoms such as breathing difficulty.
Sources and image credits
- Standard B: product, formula and instruction illustrations
- EX Cool: product, formula and instructions
- Nightect: product, formula and instructions
- Standard B: Japanese leaflet
- EX Cool: Japanese leaflet
- Nightect: Japanese leaflet
- Manufacturer range guide: iodine, azulene, CPC and adhesion
- Manufacturer development history: EX Cool cooling positioning (2018)
- Official how-to instructions and demonstration video
- Spray FAQ: frequency, presses and duration
- Nightect FAQ: frequency and presses
- Nightect FAQ: pregnancy and breastfeeding
- Spray FAQ: straight stream rather than mist
