Oral thrush can make eating, drinking and even talking uncomfortable. But it usually clears up quickly once you're using the right treatment.
Daktarin Oral Gel is one of the most widely used treatments for fungal infections in the mouth. Knowing how to use Daktarin Oral Gel properly, including the right dose, timing and how long to keep going, makes a real difference to how well it works.
This guide walks you through applying the gel step by step, how long it usually takes to clear symptoms, who should avoid it, and when to speak to a pharmacist or GP instead.
The most common mistake? Stopping too soon. Keep going for a week after your symptoms clear.
What is Daktarin Oral Gel?
Daktarin Oral Gel is a sugar-free antifungal gel containing miconazole. Miconazole damages the outer layer (cell membrane) of the fungus causing the infection, which stops it multiplying so the infection can clear.1
It's licensed to treat fungal infections of the mouth and throat, most commonly oral thrush (oral candidiasis). It can be used by adults, children and babies from 4 months old.1
It's a pharmacy (P) medicine, so you don't need a GP prescription. A pharmacist will ask you a few questions to check it's suitable, though.
Oral thrush happens when Candida, a yeast that lives harmlessly in most people's mouths, grows out of control. Common triggers include a recent course of antibiotics, a steroid inhaler for asthma or COPD, dentures, a dry mouth or a weakened immune system.2
It usually causes creamy white patches on your tongue, cheeks or the roof of your mouth. You might also notice soreness and a change in taste.
One important point: treatments differ for oral and vaginal thrush, so a treatment for one shouldn't be used for the other.
How to use Daktarin Oral Gel
Applying the gel properly matters just as much as getting the dose right. Here's how to use Daktarin Oral Gel:
- Wash your hands before applying the gel.
- Use a clean finger to apply a small amount directly to the affected areas inside your mouth.
- Keep the gel on the sore area for as long as possible. Don't swallow it straight away, though swallowing it afterwards isn't harmful.
- Use the gel after meals, four times a day, unless a doctor or pharmacist has told you otherwise.
- If you wear dentures, take them out at bedtime and rub the gel over them too. This helps stop the infection coming back once you've finished treatment.3
The dose depends on age:
- Adults and children aged 2 and over - 2.5ml of gel (half a 5ml measuring spoon), four times a day after food.
- Babies aged 4 months to 2 years - 1.25ml of gel (a quarter of a 5ml measuring spoon), four times a day after food. Give it in small amounts at the front of the mouth, not the back of the throat, to reduce the risk of choking.3
Do not put the gel at the back of a baby's throat. Small amounts at the front of the mouth lower the risk of choking.
Do not use Daktarin Oral Gel in babies under 4 months old, because of the choking risk. Babies aged 4 to 6 months who were born early or are developing more slowly need extra care too, so check with a doctor first.1
Forgotten a dose? Don't apply the missed one. Just carry on with your next dose as normal, and do not use double the amount to make up for it.3
How long does Daktarin Oral Gel take to work?
Most people notice their symptoms starting to ease within a few days. But keep using the gel for a week or so after the visible symptoms have gone, to stop the infection coming straight back.3
Stopping too early is one of the most common reasons oral thrush returns.
No improvement at all after a week of regular use, or getting worse? Speak to a doctor or pharmacist rather than carrying on with the same treatment.3
Who shouldn't use Daktarin Oral Gel?
Daktarin Oral Gel isn't suitable for everyone. Do not use it if you:
- Are allergic to miconazole, other imidazole antifungal medicines, or any of the gel's other ingredients
- Have liver problems
- Are treating a baby under 4 months old
Checking for interactions matters too. Daktarin Oral Gel must not be used alongside warfarin or other blood-thinning medicines without medical supervision.
Even though you apply it in your mouth, enough miconazole can be absorbed to affect how these medicines work. Serious bleeding, sometimes fatal, has been reported.1
Taking warfarin or another blood thinner? Do not start Daktarin Oral Gel until you've spoken to your doctor or pharmacist.
It also must not be combined with certain statins such as simvastatin or lovastatin, some antihistamines, medicines for heart rhythm problems, or ergotamine for migraine, among others.1
It can raise the risk of low blood sugar if you take certain diabetes tablets (sulphonylureas). And levels of some epilepsy medicines may need monitoring alongside it.1 Tell your pharmacist or doctor about every other medicine you take before you start, including anything bought over the counter and any herbal remedies.
Pregnant, or think you might be? Speak to a doctor before using Daktarin Oral Gel, as it's generally avoided in pregnancy unless a doctor feels it's needed.3
If you're breastfeeding, ask a doctor for advice too. Do not apply the gel to your nipple as a way of treating your baby's thrush.3
What are the side effects of Daktarin Oral Gel?
Like all medicines, Daktarin Oral Gel can cause side effects, although most people tolerate it well.
- Dry mouth, nausea or vomiting - common, affecting up to 1 in 10 people, and usually mild.
- Changed or unusual taste - common. Occasionally, your sense of taste is lost for a short time.
- Mouth discomfort or bringing food back up (regurgitation) - common, especially in the first few days.
- Diarrhoea or a sore mouth - reported less often.1
Stop using the gel and get medical help straight away if you notice signs of a serious allergic reaction. That includes swelling of the face, lips, tongue or throat, difficulty breathing or hives, or a severe skin reaction with blistering or peeling.1
If you're taking warfarin, look out for unexplained bruising or bleeding, nosebleeds or black stools. Stop the gel and get advice straight away if any of these happen.1
Preventing oral thrush coming back
Once the infection has cleared, a few habits can lower the chances of it coming back:
- Rinse your mouth with water after using a steroid inhaler, and ask about using a spacer device
- Keep any underlying condition, such as diabetes, well controlled
- Clean dentures daily and take them out overnight rather than leaving them in
- See your dentist if your dentures no longer fit properly
When should you see a doctor?
See a GP or pharmacist if:
- Symptoms haven't improved after a week of using Daktarin Oral Gel as directed
- Oral thrush keeps coming back, which can sometimes point to an underlying cause, such as undiagnosed diabetes or a weakened immune system, that's worth investigating
- You have difficulty swallowing, or the infection seems to be spreading towards the throat
- You develop any signs of a severe allergic reaction or skin reaction
Frequently asked questions
How long does it take for Daktarin Oral Gel to work?
Most people notice their symptoms starting to ease within a few days of starting Daktarin Oral Gel. It's important to keep using it for about a week after the visible symptoms have cleared, to help stop the infection coming straight back. If there's no improvement at all after a week, speak to a pharmacist or doctor.
What is Daktarin Oral Gel used for?
Daktarin Oral Gel is an antifungal treatment containing miconazole, used to treat fungal infections of the mouth and throat, most commonly oral thrush (oral candidiasis). It's suitable for adults, children and infants from 4 months of age.
Can you swallow Daktarin Oral Gel?
You shouldn't swallow the gel straight after applying it. Try to keep it in contact with the affected area for as long as possible first. Swallowing it after that point isn't a problem, and some of each dose is expected to be swallowed eventually anyway.
How do you use Daktarin Oral Gel for a baby?
For infants aged 4 months to 2 years, apply 1.25ml of gel (a quarter of a 5ml measuring spoon) four times a day after feeds, in small portions. Place the gel at the front of the mouth rather than the back of the throat, to reduce the risk of choking. Daktarin Oral Gel must not be used in babies under 4 months old.
What are the side effects of Daktarin Oral Gel?
The most commonly reported side effects are dry mouth, nausea, vomiting, mouth discomfort and a change in taste. These are usually mild. Stop using the gel and seek medical help if you notice signs of a severe allergic reaction, such as facial swelling or difficulty breathing.
Is Daktarin Oral Gel available over the counter?
Yes. Daktarin Oral Gel is a pharmacist-only (P) medicine, so you don't need a GP prescription to buy it. A pharmacist will usually ask a few questions first to check it's suitable for you, particularly around any other medicines you're taking.
References
- Electronic Medicines Compendium. Daktarin Sugar Free 2% Oral Gel: Summary of Product Characteristics. eMC; 2025. medicines.org.uk/emc
- NHS. Oral thrush (mouth thrush). NHS.uk; 2025. nhs.uk
- Electronic Medicines Compendium. Daktarin Sugar Free 2% Oral Gel: Patient Information Leaflet. eMC; 2025. medicines.org.uk/emc
- NHS. Thrush in men and women. NHS.uk; 2023. nhs.uk
This article is intended for informational purposes only and does not replace professional medical advice. Always read the patient information leaflet supplied with your medication and speak to a healthcare professional if you have specific concerns.