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Difflam Oral Rinse - 300ml

Difflam Oral Rinse - 300ml

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  • ✔️ Relieves sore throat pain and inflammation rapidly
  • ✔️ Contains benzydamine HCl 0.15% for targeted oral relief
  • ✔️ Effective for mouth ulcers, pharyngitis, and post-dental pain
  • ✔️ Suitable for adults and children aged 12 and over
  • ✔️ 300ml bottle provides multiple doses for sustained relief

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What Is Difflam Oral Rinse and How Does It Help?

 

Difflam oral rinse is a well-established over-the-counter mouthwash used to relieve pain and inflammation in the mouth and throat. It contains benzydamine hydrochloride 0.15% as its active ingredient — a locally acting non-steroidal anti-inflammatory drug (NSAID) that targets discomfort right at the source. Whether you're dealing with a sore throat, mouth ulcers, or post-dental procedure soreness, this rinse offers targeted, temporary relief without the need for a prescription. You can find it alongside other oral health products at Cured Pharmacy.

Sore throats and oral inflammation are incredibly common, particularly during the colder months. The NHS notes that most sore throats are caused by viral infections and typically resolve on their own, but managing the pain in the meantime makes a real difference to daily comfort. That's exactly where a product like this steps in.

 

How Does Difflam Oral Rinse Work in the Mouth and Throat?

 

Benzydamine hydrochloride works by inhibiting the production of prostaglandins — the chemical messengers responsible for triggering pain and swelling in inflamed tissue. Unlike systemic NSAIDs that you swallow, this rinse acts locally on the mucous membranes of the mouth and throat, meaning it gets to work quickly without being significantly absorbed into the bloodstream.

  • Benzydamine penetrates inflamed tissue directly through the mucosal lining
  • It inhibits prostaglandin synthesis, reducing localised pain signals
  • It also has mild local anaesthetic properties, providing a numbing effect on contact
  • Anti-inflammatory action helps reduce swelling in the throat and oral cavity

 

Who Should Use Difflam Oral Rinse?

 

This rinse is suitable for adults and children aged 12 and over who are experiencing pain or inflammation in the mouth or throat. It's particularly useful for people recovering from dental procedures, those with recurrent mouth ulcers, or anyone suffering from a sore throat linked to a cold or flu. If you're managing cold and flu symptoms more broadly, you might also want to explore our cold and flu range for additional support.

  • Adults and adolescents (12+) with sore throats or oral inflammation
  • People with painful mouth ulcers or aphthous stomatitis
  • Patients recovering from dental extractions or oral surgery
  • Those with pharyngitis or tonsillitis seeking symptomatic relief

 

How Does Difflam Oral Rinse Compare to Other Mouthwashes?

 

Feature Difflam Oral Rinse Chlorhexidine Mouthwash
Active ingredient Benzydamine HCl 0.15% Chlorhexidine gluconate 0.2%
Primary action Anti-inflammatory & analgesic Antibacterial
Best suited for Pain, swelling, sore throat Gum disease, plaque control
OTC availability Yes Yes

 

Is Difflam Oral Rinse Suitable for Long-Term Use and How Should It Be Stored?

 

Difflam oral rinse is designed for short-term symptomatic relief — typically up to seven days. If your symptoms persist beyond this period, it's important to speak with your GP or pharmacist, as ongoing oral pain may indicate an underlying condition that needs further investigation. For those managing recurring oral discomfort alongside other health concerns, our ear, nose and throat range may also be worth exploring.

Store the rinse below 25°C, away from direct sunlight, and keep it out of reach of children. Do not use after the expiry date printed on the bottle. Once opened, use within the period indicated on the packaging.

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.

Difflam Oral Rinse 300ml specifications
Treatment category Oral pain and inflammation relief
Mechanism of action NSAID — inhibits prostaglandin synthesis locally; mild local anaesthetic
Effective for Sore throat, mouth ulcers, post-dental pain, oral mucositis
Suitable for Adults and children aged 12 and over
Active ingredient Benzydamine hydrochloride 0.15%
Pack size 300ml
UK classification General Sale List (GSL) / Pharmacy (P) medicine
Drug class Non-steroidal anti-inflammatory drug (NSAID)
Preparation Oral rinse solution
Route of administration Topical oral (gargle and spit — do not swallow)

Specifications of Difflam Oral Rinse 300ml

 

What Is Difflam Oral Rinse and What Is It Used For?

 

Difflam oral rinse is a topical oral medicine containing benzydamine hydrochloride 0.15%. It is used to relieve pain and inflammation affecting the mouth and throat. Common conditions it helps with include sore throats, mouth ulcers, inflamed gums, and discomfort following dental procedures or oral surgery. It may also be used to manage symptoms of oral mucositis — a painful condition sometimes experienced by patients undergoing radiotherapy or chemotherapy to the head and neck area. The NHS advises that most sore throats are caused by viral infections and do not require antibiotics, making symptomatic relief products like this particularly useful.

 

What Do You Need to Know Before Using Difflam Oral Rinse?

 

Before using this rinse, it's important to check whether it is appropriate for you. Do not use it if any of the following apply:

  • You are allergic to benzydamine hydrochloride or any other ingredient in the formulation
  • You are under 12 years of age (unless directed by a doctor)
  • You have a known hypersensitivity to aspirin or other NSAIDs
  • You are pregnant or breastfeeding — consult your doctor or pharmacist first

Speak to your pharmacist or GP before use if you have asthma, as some people with asthma may be sensitive to NSAIDs. Also inform your healthcare provider if you have any existing oral conditions that are not improving.

Regarding drug interactions, no clinically significant interactions have been identified at OTC doses when used as directed. However:

  • Inform your pharmacist of all medicines you are currently taking
  • Avoid concurrent use with other oral rinses unless advised by a healthcare professional

 

How Should You Use Difflam Oral Rinse?

 

Using this rinse correctly is straightforward, but it's worth following the steps carefully to get the most benefit. Always read the patient information leaflet supplied with the product before use.

  1. Measure 15ml of the rinse using the measuring cup provided
  2. Take the liquid into your mouth
  3. Gargle or rinse thoroughly for at least 30 seconds, ensuring the liquid reaches the affected area
  4. Spit the liquid out completely — do not swallow
  5. Repeat every 1.5 to 3 hours as required

If you find the rinse causes a stinging sensation, you may dilute it with an equal volume of water. This does not significantly reduce its effectiveness for most people.

Indication Age Group Dose Frequency
Sore throat / mouth ulcers Adults & children 12+ 15ml undiluted Every 1.5–3 hours
Post-dental discomfort Adults & children 12+ 15ml (dilute if needed) Every 1.5–3 hours
Oral mucositis (under medical supervision) Adults As directed by clinician As directed

 

What Are the Possible Side Effects of Difflam Oral Rinse?

 

Like all medicines, Difflam oral rinse can cause side effects, although not everyone experiences them. If you're also managing pain elsewhere in the body, our pain relief collection has a range of options that may complement your care.

Common side effects:

  • Temporary numbness or tingling in the mouth
  • Mild stinging or burning sensation on application
  • Nausea (particularly if accidentally swallowed)

Less common side effects:

  • Hypersensitivity reactions such as skin rash or itching
  • Photosensitisation (increased sensitivity to sunlight) — rare
  • Laryngospasm — very rare; seek immediate medical attention if this occurs

Stop using the rinse and seek medical advice promptly if you develop any signs of an allergic reaction, including swelling of the face, lips, or throat, or difficulty breathing.

 

How Should You Store Difflam Oral Rinse?

 

Correct storage helps maintain the product's quality and safety throughout its shelf life. For those managing a range of health products at home, it's also worth checking storage guidance for items in our dental products range.

  • Store below 25°C in a cool, dry place
  • Keep away from direct sunlight and heat sources
  • Keep the bottle 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 bottle or carton
  • Do not dispose of medicines via wastewater or household waste — return unused product to your pharmacist

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 Difflam oral rinse online in the UK?

You can buy Difflam oral rinse directly from Cured Pharmacy, a GPhC-registered UK online pharmacy, for just £10.99 for the 300ml bottle. It is available without a prescription as an over-the-counter medicine. Simply add it to your basket and it will be dispatched to your door.

How does Difflam oral rinse work in the body?

Difflam oral rinse contains benzydamine hydrochloride 0.15%, which is a locally acting NSAID. It works by inhibiting prostaglandin synthesis in the inflamed tissue of the mouth and throat, reducing pain and swelling at the site of application. It also has mild local anaesthetic properties, which is why you may notice a numbing sensation after rinsing.

How do I use Difflam oral rinse step by step?

Measure 15ml using the cup provided, then gargle or rinse the liquid around your mouth for at least 30 seconds before spitting it out completely. Repeat every 1.5 to 3 hours as needed throughout the day. Never swallow the rinse — it is for topical oral use only.

What is the correct dose of Difflam oral rinse for adults?

The standard adult dose is 15ml of undiluted rinse, used every 1.5 to 3 hours as required. If you experience stinging, you can dilute it with an equal volume of water without significantly reducing its effectiveness. Do not use more frequently than directed on the label.

Can children use Difflam oral rinse?

Difflam oral rinse is suitable for children aged 12 and over at the same dose as adults — 15ml every 1.5 to 3 hours. It is not recommended for children under 12 unless specifically directed by a doctor. Always supervise children when using any oral medicine.

What are the side effects of Difflam oral rinse?

The most common side effects are a temporary numbing or stinging sensation in the mouth, which usually passes quickly. Less commonly, some people experience nausea or mild hypersensitivity reactions such as a rash. If you develop swelling of the face or throat, or difficulty breathing, stop use immediately and seek emergency medical help.

How do I manage the stinging sensation from Difflam oral rinse?

If the rinse causes noticeable stinging, you can dilute it with an equal volume of water before use — this is actually recommended in the product's patient information leaflet. The diluted solution is still effective for most people. If stinging persists even when diluted, speak to your pharmacist for advice.

Is Difflam oral rinse safe to use during pregnancy?

The safety of benzydamine hydrochloride during pregnancy has not been fully established, so you should consult your doctor or pharmacist before using Difflam oral rinse if you are pregnant or breastfeeding. Your healthcare provider can advise on the most appropriate option for managing oral pain during this time. Do not self-medicate without professional guidance.

How long can you use Difflam oral rinse for?

Difflam oral rinse is intended for short-term use only — typically no longer than seven days. If your symptoms have not improved within this period, you should see your GP or pharmacist, as persistent oral pain or inflammation may need further investigation. Prolonged use without medical supervision is not recommended.

What conditions is Difflam oral rinse used for?

It is used to relieve pain and inflammation associated with sore throats, mouth ulcers, inflamed gums (gingivitis), post-dental procedure discomfort, and oral mucositis. It can also help with pharyngitis and tonsillitis symptoms. For broader throat and ear concerns, you might also explore our ear, nose and throat range.

What are alternatives to Difflam oral rinse?

Alternatives include chlorhexidine-based mouthwashes, which have antibacterial rather than anti-inflammatory properties, or simple warm saline rinses for mild irritation. For pain relief that works systemically, paracetamol or ibuprofen tablets may also be appropriate — you can browse our pain relief collection for options. Your pharmacist can help you choose the most suitable product for your specific symptoms.

Can I use Difflam oral rinse if I have asthma?

Some people with asthma are sensitive to NSAIDs, including benzydamine, and may experience worsening of symptoms. If you have asthma, speak to your pharmacist or GP before using Difflam oral rinse. They can assess whether it is safe for you or suggest an alternative approach to managing your oral discomfort.

What happens if I accidentally swallow Difflam oral rinse?

Difflam oral rinse is not intended to be swallowed — it should always be spat out after rinsing. If you accidentally swallow a small amount, it is unlikely to cause serious harm in adults, but you may experience nausea. If a child swallows a significant quantity, contact NHS 111 or your nearest A&E immediately.

What are the latest studies on benzydamine mouthwash for oral mucositis?

Benzydamine hydrochloride oral rinse has been studied in the context of radiation-induced oral mucositis, with clinical guidelines from bodies including the Multinational Association of Supportive Care in Cancer (MASCC) previously recommending it for prevention in patients receiving head and neck radiotherapy. Evidence supports its use for reducing the severity of mucositis-related pain in this setting. Always follow your oncology team's specific guidance if you are undergoing cancer treatment.

Who is not eligible to use Difflam oral rinse?

You should not use Difflam oral rinse if you are allergic to benzydamine hydrochloride, aspirin, or other NSAIDs, or if you are under 12 years of age without medical direction. People with a history of NSAID-induced bronchospasm should also avoid it. Always check the full list of ingredients in the patient information leaflet before use.

How Should You Use Difflam Oral Rinse?

Using Difflam oral rinse correctly ensures you get the most benefit from each dose. Always read the patient information leaflet before use, and follow these steps carefully each time you use the product.

Do not eat or drink immediately after use to allow the active ingredient time to work on the affected tissue. If you are using the rinse after a dental procedure, follow any additional guidance given by your dentist.

What Is the Correct Dose of Difflam Oral Rinse?

The dose varies slightly depending on the age of the person using it and the condition being treated. Always stick to the recommended dose and do not use the rinse more frequently than directed.

When Is the Best Time to Use Difflam Oral Rinse?

There is no single fixed time of day for using this rinse — it is used on an as-needed basis throughout the day, up to every 1.5 hours. Many people find it most helpful first thing in the morning when throat discomfort tends to feel worse, and again before bed to ease overnight discomfort. Using it before meals can also help make eating and drinking more comfortable when you have a sore throat or mouth ulcers.

Try to space doses evenly throughout the day rather than using multiple doses in quick succession. If you are using it after a dental procedure, your dentist may give you specific timing guidance — always follow their advice over general recommendations.

How Long Can You Use Difflam Oral Rinse For?

Difflam oral rinse is intended for short-term use only. In most cases, you should not use it for longer than seven consecutive days without speaking to a healthcare professional. Most sore throats and minor mouth ulcers resolve within this timeframe.

If your symptoms persist beyond seven days, worsen significantly, or are accompanied by a high temperature, difficulty swallowing, or swollen glands, you should consult your GP. Ongoing oral pain can sometimes indicate an underlying condition that requires a different treatment approach.

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 Difflam Oral Rinse?

Most people tolerate Difflam oral rinse well, but some do experience mild side effects, particularly when first using it. These are usually temporary and resolve quickly after spitting the rinse out.

  • Temporary numbness or tingling sensation in the mouth and tongue
  • Mild stinging or burning on contact with inflamed tissue
  • Nausea, particularly if any of the rinse is accidentally swallowed

If the stinging sensation is bothersome, try diluting the 15ml dose with an equal volume of water before use. This is specifically recommended in the product's patient information leaflet and does not significantly reduce effectiveness for most people.

What Are the Less Common Side Effects of Difflam Oral Rinse?

Less commonly, some people may experience reactions that go beyond mild local irritation. These are not typical but are worth being aware of before you start using the product.

  • Skin rash or itching — may indicate a mild hypersensitivity reaction
  • Photosensitisation — increased sensitivity of the skin to sunlight (rare)
  • Dry mouth or altered taste sensation
  • Headache

If you notice any of these less common effects and they persist or cause significant discomfort, stop using the rinse and speak to your pharmacist or GP for guidance.

What Are the Serious Side Effects of Difflam Oral Rinse?

Serious side effects are rare but can occur, particularly in people with a known sensitivity to NSAIDs. You should be aware of the following warning signs and act quickly if they occur.

  • Swelling of the face, lips, tongue, or throat (angioedema)
  • Difficulty breathing or wheezing — may indicate bronchospasm
  • Laryngospasm — a sudden tightening of the vocal cords (very rare)
  • Severe allergic reaction (anaphylaxis) — requires immediate emergency treatment

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

What Should You Do If You Experience Side Effects of Difflam Oral Rinse?

For mild side effects such as stinging or temporary numbness, no specific action is usually needed beyond diluting the rinse or waiting for the sensation to pass. However, if you experience anything more concerning — such as a rash, swelling, or breathing difficulties — stop use immediately and seek medical advice. You can also report side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk. This helps improve medicine safety for everyone.

Can Difflam Oral Rinse Interact With Other Medicines?

No clinically significant drug interactions have been identified with benzydamine hydrochloride oral rinse at standard OTC doses. Because it acts locally in the mouth and throat rather than being absorbed systemically in meaningful amounts, the risk of interactions with other medicines is considered low. That said, you should always inform your pharmacist of all medicines, supplements, and herbal remedies you are currently taking before starting any new product. This is especially important if you are taking systemic NSAIDs, anticoagulants, or immunosuppressants.

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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