Mucopain Gel: Uses, How to Apply, Side Effects and Precautions

Mucopain gel is an oral anaesthetic gel that contains benzocaine. It numbs the inside of the mouth for a short time, giving temporary relief from mouth ulcers, toothache, sore gums and denture sores. Dentists also use it to numb the gums before injections.

This guide explains what Mucopain gel contains, its uses, how to apply it in the mouth, possible side effects and who should not use it.

What Is Mucopain Gel?

Mucopain gel is a topical local anaesthetic made by ICPA. It is also referred to as Mucopain ointment, Mucopain oral gel or Mucopain mouth paint.

Products described online as Mucopain tablets or syrup may be different medicines. Always check the label and the active ingredient.

How Mucopain Gel Works

Benzocaine blocks nerve signals in the area where it is applied, so the surface of the gums, cheek or tongue goes numb for a short while. It does not treat the cause of the pain; it only relieves it temporarily. For more on the active ingredient, see our guide to benzocaine.

Mucopain Gel Uses

Mucopain gel is used for short-term relief of pain and discomfort in the mouth, including:

1. Mouth ulcers, such as small canker sores on the cheeks, lips, gums or tongue.
2. Toothache, as temporary relief until you can see a dentist.
3. Sore or irritated gums.
4. Denture sores from new or poorly fitting dentures.
5. Minor injuries inside the mouth, such as a cut from a sharp tooth or brace wire.

Uses in Dental Clinics

Dentists apply topical anaesthetic gels such as Mucopain to numb the gum before a local anaesthetic injection, to reduce gagging or discomfort while taking impressions, and before minor procedures such as scaling in sensitive areas. For injectable options, see this guide to local anaesthetics used in dentistry.

How to Apply Mucopain Gel in the Mouth

1. Wash your hands well.
2. Rinse your mouth with water and gently dab the sore area dry with clean gauze or a cotton bud, if you can. The gel stays in place better on a dry surface.
3. Take a small amount of gel on a clean fingertip or cotton bud.
4. Apply it directly to the sore spot only, not to large areas of the mouth.
5. Do not swallow the gel deliberately, and avoid applying it to the back of the throat.
6. Close the tube tightly after use.

Applying Mucopain Gel on Teeth and Gums

For toothache or sore gums, apply a small amount to the gum around the painful tooth rather than inside a cavity. Relief is temporary, so book a dental visit if the pain continues.

How Often and How Long to Use It

Follow the pack instructions or your dentist's or doctor's advice. Over-the-counter benzocaine oral gels are usually used up to four times a day. If pain lasts more than a week, or keeps coming back, stop using the gel and see a dentist.

Numbness usually starts within a few minutes and wears off gradually. Avoid eating, chewing or hot drinks until normal feeling returns, so you do not bite your cheek or tongue or burn your mouth.

Side Effects of Mucopain Gel

Most people use Mucopain gel without problems. Possible side effects include:

1. Temporary stinging or burning when applied.
2. Local irritation or redness.
3. Allergic reactions, such as rash, itching or swelling of the lips, mouth or face. Stop using the gel and seek medical help if these occur.

Methemoglobinemia: A Rare but Serious Reaction

Benzocaine can rarely cause methemoglobinemia, a condition in which the blood carries less oxygen. Seek emergency medical help if, after using the gel, you or your child have pale, grey or blue lips, skin or nails, shortness of breath, headache, dizziness, tiredness or a fast heartbeat.

Precautions: Who Should Not Use Mucopain Gel

1. Babies and children under 2 years: benzocaine oral gels should not be used, including for teething, because of the risk of methemoglobinemia.
2. Older children: use only if advised by a doctor or dentist, in a small amount and under adult supervision.
3. People allergic to benzocaine or similar local anaesthetics.
4. People with a history of methemoglobinemia, or with heart or breathing conditions, should ask a doctor first.
5. Pregnant or breastfeeding women should check with a doctor or pharmacist before use.

When to See a Dentist or Doctor

1. A mouth ulcer that does not heal within about two weeks, or keeps coming back.
2. Toothache that lasts more than a day or two, or comes with swelling or fever.
3. Pain that gets worse despite using the gel.
4. Any signs of an allergic reaction or methemoglobinemia.

How to Store Mucopain Gel

Keep the tube tightly closed in a cool, dry place away from direct sunlight, and out of the reach of children. Do not use it after the expiry date.