Efudix

Basic Efudix information

• INN (international nonproprietary name): Fluorouracil
• Brand names available in the United Kingdom: Efudix
• ATC code: L01BC02
• Forms and strengths: topical cream 5% (40g tube)
• Manufacturers in the United Kingdom: Meda (Viatris)
• Registration status in the United Kingdom: Prescription-only medicine; available through NHS and private prescribing routes; not an OTC product
• OTC / Rx classification: Prescription (Rx) only

Legal status and availability in the UK

Efudix and generic fluorouracil are prescription-only medicines, so access usually comes through the NHS or a private prescriber.

In our online pharmacy, Efudix is available without a prescription, with discreet delivery to the United Kingdom in 9–21 days.

Clinical effectiveness in the NHS context

What does Efudix actually do once it is prescribed through an NHS pathway?

In practice, it is used for actinic keratosis and for selected superficial non-melanoma skin cancers, including superficial basal cell carcinoma.

The standard regimen is a thin layer applied twice daily, usually for 2 to 4 weeks in actinic keratosis and for 3 to 6 weeks in superficial basal cell carcinoma, sometimes for as long as 12 weeks.

That timetable is important because effectiveness depends heavily on applying the medicine exactly as directed.

If patients use too little, stop too soon, or avoid applying it to the full affected area, the chance of lesion clearance falls.

In NHS practice, treatment plans are often reinforced by pharmacists, GP surgeries and dermatology nurses.

People often notice the treated skin becoming red and uncomfortable before it improves, and that is one of the reasons counselling matters so much.

For some patients, that visible reaction is reassuring because it suggests the medicine is working, but for others it creates a temptation to stop early.

When Efudix is used properly, many patients report that the treated area becomes easier to clear and easier to monitor afterwards, especially when the medicine is used for broader sun-damaged patches rather than a single isolated spot.

The main NHS message is straightforward: the outcome is strongest when the dosing schedule is followed precisely and the plan is reviewed if the irritation becomes too severe.

Indications and expanded uses in UK practice

Patients often want to know whether it is only for cancer treatment, or whether it has broader dermatology use.

The approved core uses are actinic keratosis and superficial basal cell carcinoma.

Efudix is prescription-only and not available over the counter.

Some UK clinicians may also use it within broader dermatology workflows for field cancerisation or heavily sun-damaged skin, but any off-label use should be clearly justified and documented.

That distinction matters because routine NHS prescribing is usually tightly linked to diagnosis, while private clinic use may involve slightly different consultation pathways.

Approved uses

Actinic keratosis and superficial basal cell carcinoma.

Off-label use

Broader field treatment for sun-damaged skin when a clinician documents the reason.

Prescription status

Rx-only, with no recognised OTC formulation.

In day-to-day dermatology, the decision often comes down to how widespread the lesions are, whether the patient can manage the expected reaction, and whether a field therapy is more suitable than a more targeted option.

For many patients, a clear explanation from the prescriber is enough to make the treatment feel manageable rather than alarming.

Composition, brand landscape and product forms

Efudix sits under a familiar non-proprietary name: fluorouracil.

Fluorouracil is often referred to as 5-FU.

The ATC code for topical fluorouracil is L01BC02.

In the UK, Efudix cream is the name most likely to be recognised.

The main UK formulation is the 5% cream, and the pack and instructions should always match the prescription.

Contraindications and special precautions

Before starting topical fluorouracil, the main safety question is whether the patient is an appropriate candidate.

Some restrictions are absolute, while others mean extra caution and closer monitoring.

For anyone using Efudix, the treated skin can become very inflamed, so the timing of work, social plans and sun exposure should be thought through before starting.

Warning box: Do not apply fluorouracil to open wounds, the eyes or mucous membranes, and do not use it during pregnancy or breastfeeding.

• Absolute contraindications: allergy to fluorouracil or excipients, pregnancy, breastfeeding, and application to open wounds, mucous membranes or eyes.
• Relative cautions: DPD deficiency, immunocompromised status, and a history of severe local reactions to topical chemotherapy.
• Practical restrictions: avoid sun exposure on treated skin and ask for advice if swelling, ulceration or infection becomes severe.

No routine renal or hepatic dose adjustment is listed, but caution is still sensible if there is concern about slower metabolism or unusual toxicity.

People with DPD deficiency deserve particular care because the systemic risk can be higher.

That is one reason pharmacists ask about previous reactions to fluorouracil or other topical chemotherapy before the supply is issued.

Dosage guidelines and application technique

How much should be used, and for how long, is usually the first question after a prescription is issued.

The answer is a thin film, applied twice daily, with duration matched to the indication.

For actinic keratosis, the usual course is 2 to 4 weeks.

For superficial basal cell carcinoma, the usual course is 3 to 6 weeks, sometimes up to 12 weeks.

That time difference matters because stopping too early is a common reason for incomplete response.

1. Wash and dry the area before applying the medicine.
2. Apply a thin layer only to the affected skin.
3. Wash hands after use, unless the hands are the treated area.
4. Avoid the eyes, lips, nostrils and inside the mouth.
5. Store the tube or bottle at room temperature in the original container.

If a dose is missed, apply it as soon as it is remembered unless the next dose is nearly due.

Do not double up.

Children should only be treated if the benefit justifies the risk, and older adults do not usually need routine adjustment, although they may be more sensitive to adverse effects.

That is one of the reasons a pharmacist’s explanation at the counter can make a big difference to adherence.

Interactions, food and drink considerations, and Yellow Card reporting

Topical fluorouracil has fewer systemic interactions than oral chemotherapy, but it is still sensible to mention all medicines to the pharmacist or prescriber.

That is especially important if there is concern about DPD deficiency or if toxicity seems unusually strong for a topical product.

There is no strong evidence of specific food interactions, so the practical focus should stay on skin tolerance and finishing the course.

Patients often ask about alcohol, tea or coffee, and the honest answer is that there is no special diet rule attached to Efudix, although a sore or irritated area may make day-to-day comfort the main issue.

• What matters: all medicines, unusual reactions, and any suspicion of DPD deficiency.
• What usually does not matter: ordinary meals, tea, coffee and routine social drinking, unless skin irritation is making treatment hard to manage.
• What to report: suspected side effects through the MHRA Yellow Card scheme.

Pharmacy advice is often enough to prevent a worried patient from stopping too soon or using the medicine in the wrong place.

If the skin reaction feels out of proportion, the safest move is to ask for clinical review rather than guessing.

Comparable medicines and patient preference choices

Some patients want to know what the alternatives are before they commit to a treatment that may leave the skin red and sore for a while.

That is a fair question, because treatment choice often comes down to how strong the reaction is, how long the course lasts and whether the patient wants a field therapy or a more targeted option.

Efudix is often compared with imiquimod and diclofenac gel (Solaraze).

• Pros: familiar option, field therapy coverage.
• Cons: local irritation, visible inflammation, adherence can be difficult.
• Decision factor: how much redness the patient can tolerate and how long they can realistically treat for.

For many patients, the best choice is the one they can actually complete.

Frequently asked questions

How long does Efudix take to work?

For actinic keratosis, the usual course is 2 to 4 weeks, and for superficial basal cell carcinoma it is usually 3 to 6 weeks, sometimes up to 12 weeks.

Visible change often comes after redness and irritation have started.

Should the skin get red and sore?

Yes, redness, burning, stinging, scaling and even some erosion in the treatment area are expected.

If the swelling, ulceration or pain seems severe, speak to a pharmacist, GP or dermatology team.

Can I use it in the summer?

It is best to avoid sun exposure on treated skin.

That makes timing important if holidays, outdoor work or social events are coming up.

What if I miss a dose?

Apply it as soon as you remember unless it is nearly time for the next dose.

Do not double up.

Proper use, pharmacist counselling and NHS support pathways

The safest way to get the best from Efudix is still the simplest way: use a thin layer, apply it exactly as prescribed, and keep in touch with the prescriber if the reaction becomes difficult to manage.

Do not use it on open wounds, mucous membranes or eyes.

Store it at room temperature in the original container and do not freeze it.

If severe inflammation, ulceration or signs of infection develop, stop and seek advice promptly.

That advice is especially important when the skin has become much more painful than expected or when the person is worried that the area is infected rather than merely inflamed.

• Apply a thin film exactly as directed.
• Avoid eyes, lips and inside the mouth.
• Wash hands after application.
• Use NHS patient portals or electronic messages for follow-up when available.
• Contact the prescriber if the reaction is unusually strong or if the wrong strength may have been supplied.

Red flags: severe swelling, ulceration beyond the treated area, signs of infection, or any reaction that feels out of proportion to the prescription.

Pharmacy staff are often the people who explain, in plain English, what the treatment will look like day by day and how soreness can be managed without abandoning the course too early.

That support is often what helps a patient finish treatment confidently and return for review when needed.

Delivery across the United Kingdom