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Home / Fungal Nail Infections / Terbinafine


4.9 7 patient review(s) review
Dr. Sarah Donald
Content reviewed on 23-08-20 Dr. Sarah Donald
Clinical Lead

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What is Terbinafine?

Terbinafine, also known by the brand name ‘Lamisil’, is a medication used to treat fungal infections. Typical forms of infection include tinea corporis (ringworm), tinea pedis (athlete's foot) and tinea cruris (jock itch).

Treatment is either prescribed as a cream or as tablets depending on the severity and nature of your infection. Creams and powders are more effective when used to combat superficial skin infections. For more serious infections as well as nail infections, a doctor will recommend tablets. To determine what is best for you, you should consult with your GP or a dermatologist.

How does Terbinafine work?

Terbinafine is an antifungal medicine that works by forcing holes into fungal cell membranes. Cell membranes are vital to the survival of fungi. When damaged, the contents spill out, subsequently clearing the infection.

The length of treatment depends on the location and severity of the infection. However, courses usually last for between 2 weeks and 6 months. They will also be extended in the case of extreme infections; for example, badly infected toenails can take over 6 months to treat.

If you have seen no visible changes after the prescribed course, you should inform your doctor so that they can investigate further.

How to use Terbinafine?


Terbinafine tablets come in blister packs of 14 or 18 tablets. The standard dose for adults is one 250mg tablet per day. You should take tablets with water. For optimal results, you should take doses around the same time daily.

For skin infections, the doctor will usually recommend a course of between 2 to 6 weeks.

For nail infections, courses usually last for between 6 weeks and 3 months (although severe infections can last for up to 6 months).


Apply the cream 1-2 times daily, ideally in the morning and evening. Spread a thin layer over the affected skin and surrounding areas. You should rub this in gently. Once applied, you should wash your hands thoroughly.

The doctor will generally recommend a treatment course of 1-2 weeks for skin infections.

What precautions should I take while using Terbinafine?

You should always inform your doctor of any medications you might be taking and any conditions you currently have/have had. You should not take Terbinafine if you:

  • are pregnant or trying to become pregnant
  • have any problems with your kidneys or liver
  • have psoriasis
  • have systemic lupus erythematosus (SLE)

Certain medications can be dangerous when taken alongside Terbinafine. Some (but not all) of these include:

  • rifampicin
  • cimetidine
  • aertain oral contraceptives
  • certain antidepressants
  • beta-blockers or antiarrhythmics
  • warfarin, a medicine used to thin your blood
  • other fungal treatments

If you are prescribed Terbinafine in a tablet form, you should have your liver function monitored before and during treatment. Your doctor will do this with a simple blood test.

You should avoid caffeine and alcoholic beverages while using this treatment. If you are taking oral contraceptives, you should be aware that break-through bleeding and irregular periods are a risk.

What are the side effects of Terbinafine?

You must exercise caution when taking Terbinafine if you have kidney or liver problems. If you have psoriasis or an auto-immune condition, this medication can exacerbate the symptoms, so you may wish to find an alternative treatment.

Common side effects can include:

  • indigestion
  • nausea
  • bloating
  • vomiting
  • diarrhoea
  • abdominal pain

Please note, this is not a complete list of side effects. For a comprehensive list, please consult your patient leaflet.

If you experience any persistent or serious side effects, you should inform your doctor and discontinue treatment.

Can I buy Terbinafine online?

Yes. It is possible to buy Terbinafine online, although a prescription is required. Thankfully, HealthExpress offers a secure consultation service. If the treatment is suitable for your use, our UK-based doctors will provide you with a prescription.

Treatment Information
Treatment Information
Product Name: Terbinafine
Active Ingredient(s): Terbinafine
Manufacturer: Almus/Accord/Milpharm
Description: Terbinafine is a treatment for fungal infections
Exemption: Subject to medical prescription
Administration: Oral
Presentation: Tablets
Available Dosage: 250 mg
Application: Adults with fungal infections
Posology: 1 tablet daily (with water)
Drug class: Antifungal
Alcohol consumption: Avoid alcohol consumption
When breastfeeding: Not recommended, ask your doctor for alternatives
When pregnant: Not recommended, ask your doctor for alternatives
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Current reviews for the treatment Terbinafine

Rated with 4.9 based on 7 independent customer reviews

  • Excellent Product Review: Tablets i ordered were quick to arrive and pleased with instructions they had on... 03 Sep
  • Excellent Product Review: The correct product for the condition at a reasonable price delivered very quick... 30 Aug
  • Excellent Product Review: No comment. 24 Aug
  • Excellent Product Review: As expected 18 Aug
  • Excellent Product Review: This works well 15 Aug