What is Curanail?
Curanail 5% Medicated Nail Lacquer is a treatment for mild fungal infections of fingernails or toenails.
It contains amorolfine, which works by killing the fungus and stopping it from spreading. This treatment is for adults aged 18 and over and works best when only one or two nails are affected, especially if the infection is on the top or sides of the nail. Using Curanail helps the nail to grow back healthy as the infection clears.
Who can use Curanail?
Curanail is suitable for adults aged 18 and over who have a mild fungal infection of the nails. It is intended for use when only one or two nails are affected, and the infection is located on the upper half or the sides of the nail.
You may choose to use this product if you experience the following:
- Discoloured nails white, yellow, brown, or darker patches
- Thickened or distorted nails that look different from normal nails
- Brittle, crumbly, or ragged nails that break or flake easily
- Nail lifting from the nail bed or partial detachment
- Uneven, rough, or deformed nail surface
- Debris or build-up under the nail
- Bad smell from the infected nail
- Mild pain or discomfort if the nail presses against shoes
You should not use Curanail if you are allergic (hypersensitive) to amorolfine or any of the other ingredients of Curanail.
Always check the ingredients list to ensure you are not allergic to any of the components.
How to use Curanail Fungal Nail
Always use Flexitol Rescue Heel Balm exactly as explained in the instructions
- Wash and dry your feet (or hands) thoroughly before applying the balm.
- Apply a small amount enough to cover the dry, cracked or rough areas (e.g. heels, soles, cracked skin).
- Gently massage the balm into the skin until it’s fully absorbed.
- Use once or twice daily (morning and/or night) for best results.
- After the skin is restored, you can continue to use it regularly to maintain soft and healthy skin.
If you are unsure how to use it, ask your doctor or pharmacist for advice.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
Some users may experience the following:
- Nail becomes discoloured
- Nail becomes fragile or brittle / nail damage
- Burning sensation on or around the treated nail
If you notice any of these, stop using Curanail and speak to your doctor.
In rare cases, you could experience an allergic reaction to Curanail.
Signs of an allergic reaction:
- Redness, itching, or rash around the treated nail or nearby skin
- Hives, blisters, or skin swelling on or around the nail area
- Severe skin rash or dermatitis (skin inflammation)
- Swelling of the face, lips, tongue or throat (very serious allergy sign)
- Difficulty breathing or tightness in the throat or airways (very serious)
If you are concerned that you could be having an allergic reaction, seek emergency help immediately and stop using the product.
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Our Clinical Authors
Written by
Omar El-Gohary
CEO & Superintendent Pharmacist | GPhC Registration: 2059792
Medically reviewed by
Jabbar Ali
MPharm Clinical Lead | GPhC Registration: 2205490
This page has been written by a registered UK pharmacist and reviewed by our clinical team to ensure it is accurate, clear and reflects current clinical guidance.
Last medically reviewed: 20 August 2026
Last updated: 21 August 2026