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Colgate Peroxyl Medicated Mouthwash

  • Medicated oral rinse with oxygenating cleansing action
  • Helps relieve minor mouth and gum irritations
  • Alcohol-free mint-flavoured mouthwash with hydrogen peroxide
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£4.99
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Fast & Free Delivery Options

Variety of delivery options including next day & free delivery.

100% UK-based Pharmacy

Pharmacy, clinic and prescribers based in Greater Manchester.

Free Online Consultations

Start your treatment with a quick and free online consultation.

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About Colgate Peroxyl Medicated Mouthwash

Colgate Peroxyl Medicated Mouthwash is a ready-to-use oral cleansing rinse containing hydrogen peroxide 1.5% w/v, specially formulated to help cleanse and soothe minor mouth and gum irritations. This medicated mouthwash works through a unique oxygenating cleansing action that releases oxygen on contact, helping to remove debris and kill bacteria to support healing of canker sores, minor wounds, gum inflammation, cheek bites, and irritation from braces or dentures. Colgate Peroxyl is ideal for short-term relief of oral discomfort and can assist in maintaining oral hygiene after dental procedures.

Colgate Peroxyl Medicated Mouthwash comes in a 300ml bottle and is alcohol-free with a refreshing mint flavour.

 

Product Name Colgate Peroxyl Medicated Mouthwash
Active Ingredient Hydrogen peroxide 1.5% w/v
Product Form Medicated oral rinse (mouthwash)
Used to Treat Minor mouth and gum irritations, sores, wounds, gum inflammation
Available Size 300ml bottle
Who Can Use It Adults and children aged 12 years and over*
Prescription Required? No – General Sale List (GSL)

What Is Colgate Peroxyl Medicated Mouthwash Used For?

Colgate Peroxyl Medicated Mouthwash is used to help cleanse minor oral wounds, mouth sores and gum irritations, and to reduce bacterial debris in hard-to-reach areas. It supports short-term relief after dental procedures, from cheek bites, denture or brace irritation, and other minor injuries in the mouth.

Who Is Colgate Peroxyl Medicated Mouthwash Suitable For?

Colgate Peroxyl is suitable for adults and children aged 12 years and over. For children aged 6-12 years, use only under adult supervision. Do not use in children under 6 years.

Do not use Colgate Peroxyl Medicated Mouthwash if you:

  • Are allergic to hydrogen peroxide or any other listed ingredients.
  • Have severe or persistent mouth irritation lasting more than 7 days without dental advice.

Seek advice before use if you have ongoing gum conditions, extensive dental work, or if you are pregnant or breastfeeding.

How to Use Colgate Peroxyl Medicated Mouthwash

  1. Pour 10ml (one capful) into a cup.
  2. Rinse thoroughly around your mouth for approximately one minute.
  3. Spit out; do not swallow.
  4. Use this rinse three times daily, preferably after meals and at bedtime, for up to 7 days or as directed by your dentist or pharmacist.

Do not exceed the recommended duration of treatment.

Possible Side Effects

Common side effects may include:

  • Minor irritation or swelling of the mouth or gums
  • Temporary sensation that your tongue feels hairy
  • Black stain on the tongue

These effects often disappear when use is stopped. If you experience severe allergic reactions, swelling of the face or throat, or unusual symptoms, stop use and seek medical attention.

Warnings and Precautions

  • Do not swallow the mouthwash.
  • Not for prolonged use beyond 7 days unless advised by a professional.
  • Keep out of reach of children.
  • Avoid contact with eyes.
  • If irritation persists or worsens, consult your dentist or pharmacist.

Consult a healthcare professional before use if you have significant dental or gum conditions or are pregnant or breastfeeding.

Storage Instructions

  • Store at or below 25°C in a cool, dry place.
  • Do not use after the expiry date shown on the bottle label.
  • Keep out of sight and reach of children.

Colgate Peroxyl Medicated Mouthwash Reviews

Our Experienced UK-based Pharmacy Team

Clinical Consultant
MUDr, MRCEM, EBCEM, FRCEM
GMC no. 7176414

Pharmacist
MPharm
GPhC no. 2065469

Pharmacist
MPharm
GPhC no. 2046514

Page content authored by Amjad Khan, last reviewed by Mr Muhammad on 3rd February 2026.

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