Timodine

Timodine Cream is a combination topical preparation containing nystatin, hydrocortisone, benzalkonium chloride, and dimethicone.

It is licensed in the United Kingdom for the treatment of skin conditions where candidal infection and inflammation coexist, particularly napkin dermatitis (nappy rash) complicated by Candida albicans and candidal intertrigo in skin folds.

Timodine is a prescription-only medicine (POM) in the UK.

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Timodine Cream is a prescription-only combination topical preparation licensed in the United Kingdom for the treatment of napkin dermatitis (nappy rash) complicated by Candida albicans infection and candidal intertrigo in skin folds.

It contains four active ingredients: nystatin (100,000 units per gram), hydrocortisone (0.5%), benzalkonium chloride (0.2%), and dimethicone (10%).

This unique four-component formulation addresses the multiple pathological processes involved in candidal skin infections simultaneously, providing antifungal, anti-inflammatory, antiseptic, and barrier protection in a single application.

Napkin dermatitis is one of the most common skin conditions in infancy, affecting up to 50% of babies at some point during the nappy-wearing period.

While many cases are simple irritant contact dermatitis, Candida albicans is implicated in a significant proportion of moderate to severe cases.

Candidal intertrigo in adults is also common, particularly in individuals with diabetes, obesity, or immunosuppression.

This page provides comprehensive clinical information about Timodine Cream, including how its ingredients work, when it is indicated, correct application technique, side effects, safety warnings, and how to obtain a prescription in the UK.

Important safety information about Timodine

Before reading further, note the following key safety points about Timodine Cream.

  • Timodine is a medicated treatment, not a preventive nappy cream. Use only when candidal infection is present, not for routine nappy care.
  • Do not use for longer than 7 to 14 days without medical review, particularly in infants and on skin folds.
  • Do not apply to the eyes, mouth, or broken or weeping skin unless directed by your prescriber.
  • Do not use on viral skin infections (herpes, chickenpox), untreated bacterial infections, or acne.

What is napkin dermatitis

Napkin dermatitis, commonly known as nappy rash, is an acute inflammatory skin condition that affects the area covered by a nappy.

It results from prolonged contact between the skin and urine, faeces, and moisture trapped within the nappy, leading to irritant contact dermatitis.

The skin becomes red, sore, and occasionally eroded.

Contributing factors include infrequent nappy changes, occlusion of the skin by plastic or synthetic nappy linings, and the alkaline environment created when urease-producing bacteria break down urea in urine.

Simple irritant napkin dermatitis typically presents as diffuse erythema on the convex surfaces of the buttocks, thighs, and lower abdomen, sparing the skin creases.

When Candida albicans colonises the damaged skin, the clinical picture changes.

Candidal napkin dermatitis presents as bright red, well-demarcated patches with a glazed or shiny surface, satellite papules and pustules extending beyond the main area of erythema, and involvement of the skin creases (inguinal folds, natal cleft).

The distinction between simple irritant nappy rash and candidal nappy rash is clinically important, as the latter requires antifungal treatment for resolution.

Candidal intertrigo in adults

Intertrigo refers to inflammation of skin folds caused by friction, heat, moisture, and maceration.

Common sites include the submammary folds (beneath the breasts), inguinal creases, axillae, natal cleft, and abdominal folds in obese individuals.

Candida albicans frequently colonises these warm, moist environments, converting simple intertrigo into candidal intertrigo. Risk factors include obesity, diabetes mellitus, hyperhidrosis, immunosuppression, and antibiotic use.

The condition presents as erythema, maceration, fissuring, and satellite pustules within the affected skin fold.

Timodine Cream is an appropriate treatment option when both candidal infection and inflammation are present.

How Timodine works: the four active ingredients

Nystatin: antifungal action

Nystatin is a polyene antifungal antibiotic produced by Streptomyces noursei.

It exerts its antifungal effect by binding to ergosterol, the principal sterol in the fungal cell membrane of Candida species.

This binding creates pores in the membrane, increasing its permeability and allowing leakage of essential intracellular contents (potassium ions, amino acids, nucleotides), ultimately leading to fungal cell death.

Nystatin is fungicidal against Candida albicans at the concentrations achieved in topical formulations.

It is not absorbed through intact or damaged skin when applied topically, so systemic side effects are not a concern.

Hydrocortisone: anti-inflammatory action

Hydrocortisone 0.5% is a mild (Group VII, lowest potency) topical corticosteroid. It acts by binding to intracellular glucocorticoid receptors and modulating gene transcription to suppress the inflammatory cascade.

Specifically, it inhibits phospholipase A2 (via induction of lipocortin), reducing the synthesis of prostaglandins, leukotrienes, and thromboxanes.

It also decreases capillary permeability, reducing oedema and erythema, and inhibits the migration and activation of inflammatory cells (neutrophils, macrophages, lymphocytes).

In the context of napkin dermatitis and intertrigo, hydrocortisone rapidly reduces the redness, swelling, itching, and discomfort that accompany the inflammatory component of the condition.

Benzalkonium chloride: antiseptic action

Benzalkonium chloride 0.2% is a quaternary ammonium compound with broad-spectrum antimicrobial activity against Gram-positive and Gram-negative bacteria.

In Timodine, it helps prevent secondary bacterial infection of skin that is already compromised by candidal infection and inflammation.

Damaged skin in the nappy area is particularly vulnerable to bacterial colonisation from faecal flora, and the antiseptic component provides an additional layer of protection.

Dimethicone: barrier protection

Dimethicone (dimethylpolysiloxane) 10% is a silicone-based emollient that forms a transparent, water-repellent protective film on the skin surface.

In the nappy area, this barrier shields the skin from ongoing exposure to urine, faecal enzymes, and moisture, which are the primary irritants driving napkin dermatitis.

In intertrigo, dimethicone reduces friction between opposing skin surfaces and protects against maceration from sweat and moisture.

This protective function is essential for allowing the damaged skin to heal while treatment addresses the infection and inflammation.

Clinical evidence and national guidelines

NICE Clinical Knowledge Summary on Nappy Rash recommends that first-line management of simple irritant napkin dermatitis involves frequent nappy changes, exposure of the skin to air where possible, gentle cleansing with water, and application of a barrier preparation.

If candidal infection is suspected (based on the characteristic clinical features described above), a topical antifungal agent should be prescribed.

For cases with significant inflammation, a mild topical corticosteroid may be used alongside the antifungal for a short course.

Timodine Cream provides both the antifungal and anti-inflammatory components in a single product, along with antiseptic and barrier protection, making it a practical and convenient choice for candidal napkin dermatitis.

It avoids the need to apply multiple separate products, which can be difficult for parents managing frequent nappy changes.

The BNF for Children lists Timodine as a suitable option for napkin rash complicated by candidal infection.

For candidal intertrigo in adults, NICE CKS on Fungal Skin Infection recommends topical antifungal treatment combined with measures to reduce moisture and friction in the affected skin fold.

A mild topical corticosteroid may be used for the first few days to rapidly reduce inflammation and discomfort, but should not be continued beyond 14 days to avoid corticosteroid-related skin changes.

Application and practical guidance

How to apply Timodine for napkin dermatitis

At each nappy change, clean the baby's bottom gently with warm water or a fragrance-free baby wipe. Pat the skin dry thoroughly with a soft towel.

Allow the skin to air-dry briefly if the baby is comfortable.

Apply a thin layer of Timodine Cream to the affected areas, smoothing it gently over the rash and any satellite lesions. Replace the nappy.

Repeat at each nappy change, typically two to three times daily.

If using a separate barrier cream (such as zinc and castor oil) on unaffected areas to prevent further irritation, apply Timodine to the infected areas first, allow it to absorb, and then apply the barrier cream to surrounding skin.

How to apply Timodine for intertrigo

Wash the affected skin fold with warm water and a gentle soap-free cleanser. Dry the area thoroughly, paying particular attention to the skin creases.

Apply a thin layer of Timodine Cream to the affected area and gently smooth it in. Allow the cream to absorb before dressing.

Wear loose, breathable clothing to reduce moisture accumulation. Apply two to three times daily as directed.

Duration of treatment

Continue applying Timodine for 7 days after the skin has cleared to prevent relapse. Total treatment duration should not normally exceed 7 to 14 days without medical review.

If the condition has not improved within 7 days, seek reassessment.

For recurrent candidal napkin dermatitis or intertrigo, your prescriber may investigate underlying causes such as diabetes (in adults), immunosuppression, or concurrent antibiotic use.

Side effects of Timodine

Local side effects

Mild burning, stinging, or irritation at the application site may occur, particularly when the cream is first applied to inflamed or broken skin.

This usually subsides within minutes and does not require treatment discontinuation. Contact allergic dermatitis is uncommon but may develop to any of the ingredients, most commonly benzalkonium chloride.

Suspect this if the skin condition worsens or a new itchy rash develops at the treatment site. Discontinue use and consult your prescriber.

Corticosteroid-related side effects

Although hydrocortisone 0.5% is the mildest available topical corticosteroid, prolonged or inappropriate use can cause local skin changes including thinning (atrophy), striae, telangiectasia, increased hair growth, and depigmentation.

The nappy area and skin folds are sites of natural occlusion, which increases corticosteroid penetration and raises the risk of these effects.

In infants, prolonged use under the nappy can lead to measurable adrenal suppression and, in extreme cases, Cushingoid features.

These risks are minimised by adhering to recommended treatment durations and seeking medical review if treatment is needed beyond 14 days.

When to seek medical advice

Contact your GP, health visitor, or pharmacist if the rash worsens or does not improve within 7 days.

Seek urgent medical advice if the baby develops a fever alongside the rash, if the skin becomes blistered, bleeding, or weeping extensively, or if the rash spreads rapidly beyond the nappy area.

Report any suspected adverse reactions via the MHRA Yellow Card scheme at yellowcard.mhra.gov.uk .

Warnings and precautions

Appropriate use only

Timodine should be used only for confirmed or strongly suspected candidal skin infections with an inflammatory component.

It is not appropriate for simple irritant nappy rash (which should be managed with barrier creams alone), eczema (which requires different corticosteroid preparations and emollients), bacterial skin infections (which require antibiotics), or viral skin infections.

Applying corticosteroids to untreated bacterial or viral infections can mask symptoms and allow the infection to worsen.

Use in infants

Infants have a higher body surface area to weight ratio than adults, increasing the proportion of topically applied drug that may be absorbed systemically.

The nappy area is additionally prone to occlusion.

For these reasons, treatment in infants should be supervised by a healthcare professional, limited to the shortest effective duration, and the infant should be reviewed before treatment is continued beyond 7 days.

Parents should be counselled that Timodine is a treatment, not a preventive, and that once the candidal infection has cleared, they should switch to a non-medicated barrier cream for ongoing nappy care.

Pregnancy and breastfeeding

While mild topical corticosteroids are generally considered safe for short-term use on small areas during pregnancy, the safety of Timodine's combination formulation has not been specifically studied in pregnancy.

Pregnant women should consult their GP or midwife before use.

If breastfeeding, avoid applying Timodine to the breast area to prevent the infant from ingesting the cream during feeding.

How to get a Timodine prescription in the UK

Timodine is a prescription-only medicine (POM) in the UK. It can be prescribed by GPs, health visitors with independent prescribing qualifications, paediatricians, dermatologists, and authorised online prescribers.

If your baby has a persistent or severe nappy rash that has not responded to simple measures (frequent nappy changes, barrier creams), arrange an appointment with your GP or health visitor for assessment.

All UK prescriptions are dispensed by registered pharmacies.

The standard NHS prescription charge in England is 9.90 pounds per item; prescriptions are free in Scotland, Wales, and Northern Ireland.

Sources

  • Timodine Cream, Summary of Product Characteristics (EMC)
  • Nystatin, British National Formulary (BNF)
  • NICE CKS: Nappy Rash
  • NICE CKS: Fungal Skin Infection
  • Nappy rash, NHS
  • MHRA Yellow Card Scheme

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