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Bonjela Adult Cool Mint Gel - 15g

Bonjela Adult Cool Mint Gel - 15g

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  • ✔️ Relieves mouth ulcer pain directly at the source
  • ✔️ Antiseptic action helps prevent secondary oral infection
  • ✔️ Cool mint formula soothes irritated gum tissue instantly
  • ✔️ Suitable for denture rubbing and sore gum discomfort
  • ✔️ Compact 15g tube — easy to use at home or on the go

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What Is Bonjela Adult Gel and How Does It Help?

 

Mouth ulcers are surprisingly common. In fact, most people will experience at least one at some point in their lives — and if you have, you'll know just how uncomfortable they can be. Eating, drinking, even talking can become genuinely painful. Bonjela adult gel is a well-established over-the-counter treatment designed to relieve that discomfort quickly and directly at the source. Available in a refreshing cool mint flavour, this 15g tube is a handy, easy-to-use option you can keep in your medicine cabinet for whenever you need it. You can browse our full range of oral health products at Cured Pharmacy for more options to support your mouth health.

The gel is suitable for adults and young people aged 16 and over. It works on a range of oral conditions — not just ulcers — making it a genuinely versatile product to have at home. At just £4.99 for a 15g tube, it offers accessible relief without needing a prescription.

 

How Does Bonjela Adult Cool Mint Gel Work?

 

The gel contains two active ingredients that work together to tackle both pain and the risk of infection:

  • Choline salicylate 8.7% w/w — a salicylate compound with analgesic (pain-relieving) and anti-inflammatory properties. It reduces the sensation of pain at the site of the ulcer or irritation by acting on local pain receptors in the oral mucosa.
  • Cetalkonium chloride 0.01% w/w — an antiseptic agent that helps reduce the risk of secondary bacterial infection at the affected site.

When you apply the gel directly to the sore area, the choline salicylate gets to work relatively quickly, helping to numb the discomfort. The cool mint formulation also provides a mild soothing sensation, which many people find immediately comforting.

 

Who Should Use Bonjela Adult Cool Mint Gel?

 

This gel is intended for adults and young people aged 16 years and over. It is particularly useful for anyone experiencing:

  • Mouth ulcers (aphthous ulcers)
  • Sore or inflamed gums (gingivitis)
  • Discomfort caused by denture rubbing or ill-fitting dental appliances
  • Cold sores inside the mouth
  • Minor oral irritations following dental procedures

It is not suitable for children under 16 due to the salicylate content. If you are pregnant, breastfeeding, or have a known allergy to aspirin or other NSAIDs, speak to your pharmacist before using this product.

 

How Does Bonjela Adult Gel Compare to Other Mouth Ulcer Treatments?

 

Feature Bonjela Adult Cool Mint Gel Anbesol Liquid
Active ingredient Choline salicylate + Cetalkonium chloride Lidocaine + Chlorocresol + Chloroxylenol
Form Gel (easy to apply topically) Liquid (applied with cotton bud)
Suitable age 16 years and over 12 years and over
Antiseptic action Yes (cetalkonium chloride) Yes (chlorocresol, chloroxylenol)

 

Is Bonjela Adult Gel Safe to Store at Home?

 

Yes — storing this gel correctly is straightforward. Keep it below 25°C, away from direct sunlight, and out of reach of children. Do not refrigerate the tube. Once opened, check the expiry date on the packaging and do not use it beyond that date. If you are managing multiple oral health concerns, our dental products collection includes a range of complementary treatments to support your routine.

As with all salicylate-containing products, bonjela adult gel should be used with care if you are taking anticoagulant medicines such as warfarin — speak to your pharmacist if you are unsure. Avoid applying to large areas of the mouth simultaneously.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Bonjela Adult Cool Mint Gel 15g specifications
Treatment category Oral pain relief / mouth ulcer treatment
Active ingredient Choline salicylate 8.7% w/w; Cetalkonium chloride 0.01% w/w
Mechanism of action Analgesic, anti-inflammatory (salicylate); antiseptic (cetalkonium chloride)
Suitable for Adults and young people aged 16 years and over
Pack size 15g tube
UK classification General Sale List (GSL)
Drug class Salicylate analgesic / antiseptic
Preparation Topical oral gel
Route of administration Topical application to oral mucosa
Effective for Mouth ulcers, sore gums, denture irritation, cold sores in the mouth

Specifications of Bonjela Adult Cool Mint Gel 15g

 

What Is Bonjela Adult Cool Mint Gel and What Is It Used For?

 

Bonjela Adult Cool Mint Gel is a topical oral gel used to relieve pain, soreness, and discomfort in the mouth. It is classified as a General Sale List (GSL) medicine in the UK, meaning you can buy it without a prescription. The gel is used to treat a range of common oral complaints, including mouth ulcers, sore or inflamed gums, irritation caused by dentures or orthodontic appliances, and minor cold sores inside the mouth. It is not a cure for these conditions, but it provides meaningful symptomatic relief while the affected tissue heals naturally.

 

What Do You Need to Know Before Using Bonjela Adult Cool Mint Gel?

 

Before applying this gel, there are some important safety points to be aware of. Do not use this product if any of the following apply to you:

  • You are under 16 years of age
  • You are allergic to aspirin, other salicylates, or any NSAIDs
  • You are allergic to any other ingredient in the gel (check the full ingredients list on the packaging)
  • You have a known hypersensitivity to cetalkonium chloride

Use with caution and speak to your pharmacist or GP first if:

  • You are pregnant or breastfeeding
  • You are taking anticoagulant medicines such as warfarin
  • You have asthma, as salicylates can occasionally trigger bronchospasm in sensitive individuals
  • You have a mouth ulcer that has lasted longer than three weeks without improvement

Drug interactions: At the low topical doses used in this gel, clinically significant drug interactions are unlikely. However, if you are taking anticoagulants or other salicylate-containing medicines, speak to your pharmacist before use. You can also explore our wider pain relief collection if you need additional support for managing discomfort.

 

How Should You Use Bonjela Adult Cool Mint Gel?

 

Using the gel correctly will help you get the most benefit from it. Follow these steps each time you apply it:

  1. Wash your hands thoroughly before and after application.
  2. Squeeze a small pea-sized amount of gel onto a clean fingertip or cotton bud.
  3. Gently apply the gel directly to the affected area in the mouth.
  4. Massage it in lightly using a circular motion for a few seconds.
  5. Avoid eating, drinking, or rinsing your mouth for at least 30 minutes after application to allow the gel to work.
Indication Age Group Dose Frequency
Mouth ulcers 16 years and over Small pea-sized amount Every 3–4 hours, max 6 times in 24 hours
Sore gums / denture irritation 16 years and over Small pea-sized amount Every 3–4 hours, max 6 times in 24 hours
Under 16 years Not applicable Do not use — not suitable for this age group

 

What Are the Possible Side Effects of Bonjela Adult Cool Mint Gel?

 

Side effects with this gel are uncommon when used as directed. Most people tolerate it well. That said, it is worth knowing what to look out for.

Common side effects:

  • Mild burning or stinging sensation at the application site immediately after use
  • Temporary numbness or tingling in the treated area

Less common side effects:

  • Local irritation or redness of the oral mucosa
  • Hypersensitivity reactions such as rash, itching, or swelling — stop use immediately if this occurs
  • In rare cases, salicylate sensitivity reactions in people with aspirin intolerance

If you experience any signs of a serious allergic reaction — including swelling of the face, lips, or throat, difficulty breathing, or a severe rash — stop using the gel immediately and seek urgent medical attention.

 

How Should You Store Bonjela Adult Cool Mint Gel?

 

Correct storage keeps the gel effective and safe to use throughout its shelf life. Follow these guidelines:

  • Store below 25°C in a cool, dry place
  • Do not refrigerate or freeze the tube
  • Keep away from direct sunlight and heat sources
  • Keep the cap tightly closed when not in use
  • Keep out of the sight and reach of children
  • Do not use after the expiry date printed on the tube and carton
  • Do not dispose of medicines via wastewater or household waste — return unused medicines to your pharmacist

If you are looking for other products to support your overall wellbeing alongside this gel, our first aid collection has a range of useful items for everyday health needs at home.

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy Bonjela Adult Cool Mint Gel online in the UK?

You can buy Bonjela Adult Cool Mint Gel 15g directly from Cured Pharmacy for £4.99 with fast UK delivery. It is a General Sale List medicine, so no prescription is needed. It is also available from most high street pharmacies and supermarkets across the UK.

How does Bonjela Adult Gel work on mouth ulcers?

The gel contains choline salicylate, which has analgesic and anti-inflammatory properties that reduce pain and swelling at the ulcer site. The second active ingredient, cetalkonium chloride, acts as an antiseptic to help prevent secondary bacterial infection. Together, they provide both symptomatic relief and a degree of protection while the ulcer heals.

How do I apply Bonjela Adult Cool Mint Gel step by step?

Wash your hands first, then squeeze a small pea-sized amount onto a clean fingertip or cotton bud. Apply it directly to the affected area and gently massage it in. Avoid eating, drinking, or rinsing your mouth for at least 30 minutes afterwards so the gel has time to work properly.

How often can I use Bonjela Adult Gel in one day?

You can apply the gel every three to four hours as needed, up to a maximum of six times within any 24-hour period. Do not exceed this frequency. If your symptoms are not improving after several days of regular use, speak to your pharmacist or GP.

Can children use Bonjela Adult Cool Mint Gel?

No — Bonjela Adult Cool Mint Gel must not be used by anyone under 16 years of age. This is because it contains choline salicylate, a salicylate compound that carries a risk of Reye's syndrome in children. For younger children, speak to your pharmacist about age-appropriate alternatives, and you can also browse our baby and toddler range for suitable products.

Is Bonjela Adult Gel safe to use during pregnancy?

If you are pregnant or breastfeeding, you should speak to your GP or pharmacist before using Bonjela Adult Gel. Salicylate-containing products are generally used with caution during pregnancy, particularly in the third trimester. Your healthcare provider can advise on the safest option for your situation.

Can I use Bonjela Adult Gel if I am allergic to aspirin?

No. Bonjela Adult Gel contains choline salicylate, which is chemically related to aspirin. If you have a known allergy or sensitivity to aspirin or other NSAIDs, you should not use this product. Speak to your pharmacist who can recommend a suitable alternative for oral pain relief.

What are the side effects of Bonjela Adult Cool Mint Gel?

Most people experience no side effects when using the gel as directed. Some people may notice a mild burning or stinging sensation immediately after application, which usually settles quickly. Rarely, hypersensitivity reactions such as rash, swelling, or difficulty breathing can occur — if this happens, stop use immediately and seek medical attention.

How long does it take for Bonjela Adult Gel to work?

Many people notice a reduction in pain and discomfort within a few minutes of applying the gel, as the choline salicylate begins to act on local pain receptors in the oral mucosa. The cool mint formulation also provides an immediate soothing sensation. Full healing of the underlying ulcer or irritation will still take several days, as the gel treats symptoms rather than the root cause.

How long should I use Bonjela Adult Gel for?

Most mouth ulcers resolve naturally within 10 to 14 days. If your symptoms have not improved after 7 days of using the gel, or if the ulcer appears to be getting worse, stop use and consult your GP or dentist. A mouth ulcer that persists for more than three weeks should always be assessed by a healthcare professional.

What happens if I accidentally swallow Bonjela Adult Gel?

Swallowing a small amount of the gel during normal use is unlikely to cause harm in adults. However, if a large amount is swallowed — particularly by a child — contact NHS 111 or your nearest A&E immediately. Always keep the tube out of reach of children and store it securely after use.

Can I use Bonjela Adult Gel with dentures?

Yes — Bonjela Adult Gel is specifically indicated for discomfort caused by denture rubbing and ill-fitting dental appliances. Apply the gel to the sore area of the gum before replacing your dentures, or remove your dentures first and apply directly to the irritated tissue. If denture rubbing is a persistent problem, speak to your dentist about having your dentures adjusted.

What are the alternatives to Bonjela Adult Gel for mouth ulcers?

There are several alternatives available over the counter in the UK, including Anbesol Liquid (lidocaine-based), Orajel gel, and Iglu gel. Corticosteroid-based treatments such as Adcortyl in Orabase may be recommended for more persistent ulcers. Browse our oral health collection to compare available options and find the right product for your needs.

Does Bonjela Adult Gel interact with any medicines?

At the low topical doses used in this gel, clinically significant drug interactions are unlikely for most people. However, if you are taking anticoagulant medicines such as warfarin, or other salicylate-containing products, you should speak to your pharmacist before use. This is a precautionary measure, as salicylates can theoretically affect anticoagulant activity if absorbed systemically.

What is the latest research on choline salicylate for mouth ulcers?

Choline salicylate has been used in topical oral preparations for decades and its analgesic and anti-inflammatory properties are well established in clinical practice. Current NHS guidance confirms that topical salicylate gels remain a recognised first-line option for symptomatic relief of minor mouth ulcers in adults. Ongoing research continues to explore the optimal formulations for oral mucosal pain management, but choline salicylate-based gels remain a clinically accepted choice.

How Should You Use Bonjela Adult Cool Mint Gel?

Using Bonjela Adult Cool Mint Gel correctly makes a real difference to how well it works. Always apply it directly to the affected area rather than spreading it across the whole mouth. Here is a simple step-by-step guide to follow each time you use it:

Try not to apply more gel than needed. A small amount applied precisely to the sore spot is more effective than a large amount spread broadly.

What Is the Correct Dose of Bonjela Adult Cool Mint Gel?

The dose is the same regardless of the specific oral condition being treated. Always use the smallest effective amount and do not exceed the maximum daily frequency. The table below summarises the recommended dosing for adults and young people aged 16 and over.

When Is the Best Time to Use Bonjela Adult Cool Mint Gel?

There is no single fixed time of day for using this gel — you apply it when you need it, up to the maximum daily limit. That said, many people find it particularly helpful to apply the gel before meals to reduce discomfort while eating, and again before bed to help manage overnight soreness. Applying it after meals rather than during them also makes sense, as you will need to avoid eating for 30 minutes after application. If you are using it for denture irritation, applying it before inserting your dentures in the morning can help protect the gum tissue throughout the day.

How Long Can You Use Bonjela Adult Cool Mint Gel For?

Most mouth ulcers and minor oral irritations heal within 10 to 14 days. You can use the gel throughout this period as needed, within the recommended daily limits. However, if your symptoms have not improved after 7 days of consistent use, you should stop using the gel and speak to your GP or dentist. Any mouth ulcer that persists for more than three weeks, or that is unusually large, painful, or recurrent, should always be assessed by a healthcare professional to rule out an underlying cause.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

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What Are the Most Common Side Effects of Bonjela Adult Cool Mint Gel?

The majority of people who use Bonjela Adult Cool Mint Gel as directed do not experience any significant side effects. The most commonly reported reactions are mild and localised to the area of application. They typically resolve quickly on their own without any treatment.

  • Mild burning or stinging sensation immediately after applying the gel
  • Temporary numbness or tingling in the treated area
  • A brief intensification of sensitivity at the ulcer site upon first contact

What Are the Less Common Side Effects of Bonjela Adult Cool Mint Gel?

Less commonly, some people may experience a degree of local irritation that goes beyond the initial sting. These reactions are still generally mild but are worth monitoring, particularly if they persist or worsen with continued use.

  • Redness or inflammation of the surrounding oral mucosa
  • Increased soreness or sensitivity at the application site
  • Dry or peeling sensation of the oral tissue with prolonged use
  • Unpleasant taste or altered taste sensation

If any of these less common effects persist beyond a day or two, or if they seem to be getting worse rather than better, stop using the gel and speak to your pharmacist.

What Are the Serious Side Effects of Bonjela Adult Cool Mint Gel?

Serious side effects are rare but can occur, particularly in people with a sensitivity to salicylates or other ingredients in the gel. The most significant concern is a hypersensitivity or allergic reaction. Signs of a serious allergic reaction include:

  • Swelling of the face, lips, tongue, or throat
  • Difficulty breathing or swallowing
  • Widespread skin rash, hives, or itching
  • Dizziness or feeling faint

If you experience any of these symptoms after applying the gel, stop use immediately and call 999 or go to your nearest A&E. Do not wait to see if the symptoms improve on their own.

What Should You Do If You Experience Side Effects of Bonjela Adult Cool Mint Gel?

For mild side effects such as a brief stinging sensation, no action is usually needed — this is a normal response to the active ingredients making contact with sensitive oral tissue. If you experience persistent irritation, redness, or worsening discomfort, stop using the gel and consult your pharmacist. They can advise whether to continue, switch to an alternative product, or refer you to your GP. You can also report suspected side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

Can Bonjela Adult Cool Mint Gel Interact With Other Medicines?

At the low topical doses used in this gel, the risk of clinically significant drug interactions is low for most people. However, choline salicylate is a salicylate compound, and caution is advised if you are taking anticoagulant medicines such as warfarin, as salicylates can theoretically potentiate anticoagulant effects if absorbed systemically. You should also avoid using this gel alongside other salicylate-containing products to prevent cumulative exposure. If you are taking any regular prescription medicines, speak to your pharmacist before starting to use this gel.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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