Terbinafine Hydrochloride

Lamisil is the branded medication for treating fungal nail infections. It is part of the antifungal group and contains the active ingredient Terbinafine.

We do not provide this treatment online. If you think you have a fungal nail infection, we recommend you contact your GP.

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PLEASE NOTE: This treatment is not available through our online pharmacy service. This page is for information only. If you are experiencing any of the symptoms related to the condition(s) this medication treats, we strongly recommend that you see your GP in person.
Product information

Lamisil is a brand of antifungal medication, which uses the functioning ingredient terbinafine to fight fungal nail infections. It is also adept at clearing up fungal skin infections.

  1. Effectively kills off the infected organisms
  2. Branded tablet medication
  3. One-a-day treatment

Onychomycosis is contracted because of an increase in the production of fungal cells that live on the skin. The infection can then breach damaged nails, and cause them them to discolour and thicken. The nail can become brittle and parts of it may flake off, or it may become detached from the nailbed completely. The condition is fairly common in adults, especially those over the age of 55, and does not usually cause any pain. However, if left untreated the nail area may become inflamed, making it painful to carry out everyday activities such as walking or writing.

There are various reasons why a fungal nail infection might develop. Athlete's foot is one, which can transfer from the skin to the nails. Once an infection is established on the toenails it can be easily passed on to the fingernails, especially if the infected nails are itched. Although they are less common, infections of the fingernails may be found in those who frequently wash their hands or work in water, as this can damage to the nail base, thus allowing fungi to enter. There are also some health conditions that make you more susceptible to a fungal nail attack such as diabetes, psoriasis, poor circulation or a weakened immune system.

A course of antifungal treatment such as Lamisil is recommended to clear up a fungal nail infection. The active constituent in Lamisil is terbinafine, which is part of the antifungal medicine group. It works by rebalancing the number of fungi present in the body. It does this by stopping ergosterol from being created, a component used by the infection-causing fungi to multiply. The antifungal agent damages the structure of the cell membranes, and is then able to destroy them.

If you are seeking a prescription treatment for your fungal nail infection, we recommend you see your doctor in person. They will examine your symptoms and issue an appropriate medication.

Page last reviewed:  14/06/2018


You should always follow the instructions provided by your prescribing clinician. Adhering to their directions will help to optimise the effects of the medication and reduce the prospect of side effects.

  1. Follow the directions from your prescriber. 
  2. The tablet should be swallowed whole with water and can be taken with or without food. 
  3. It is best practice to take the tablet at the same time each day. 
  4. Take the tablets as prescribed until you complete the course.

For more detailed instructions, please refer to the patient information leaflet.

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Page last reviewed:  14/06/2018
Please read the patient information leaflet for this medicine fully before use:

Lamisil 250mg

Side effects & Warnings

Side effects

If you notice any symptoms which could indicate an allergic reaction, you should immediately contact your doctor. Further information on potential side effects can be found in the patient information leaflet.

Common (1 in 10 people or less):

Headache, diarrhoea, itching, rash, swelling, muscle or joint pain.

Uncommon (1 in 100 people or less):

Taste change or loss of taste.

Rare (1 in 1,000 people or less):

Feeling unwell, dizzy, numbness or tingling.

Very rare (1 in 10,000 people or less):

Feeling tired, a decrease in the number of some blood cells which can lead to bruising easily, vertigo, hair loss, lupus.

The side effects listed here are only a guide. For further advice, consult the patient information leaflet.

Taking it with other medications

When commencing a new treatment it is important that you inform your prescriber of any other treatments that you are using or have recently used.

Lamisil may interact with the following: rifampicin, cimetidine, tricyclic antidepressants, SSRIs (selective serotonin reuptake inhibitors), or MAOIs (monoamine oxidase inhibitors), oral contraceptives, beta-blockers or anti-arrhythmics, warfarin, ciclosporin, caffeine, medicines used to treat heart problems, coughs or fungal infections.

Conditions to look out for

You should inform the prescriber if you are pregnant or trying to become pregnant, are breastfeeding, have problems with your kidneys or liver, have psoriasis or systemic lupus erythematosis (SLE).

Pregnancy and breastfeeding

Check with your doctor before taking Lamisil if you are pregnant, breastfeeding or trying for a baby.

Driving and using machinery

Refrain from driving or operating machines if you experience any side effects that could inhibit concentration.

Blood tests

When you are taking Lamisil, your doctor will need to monitor your liver function by conducting blood tests.

Page last reviewed:  14/06/2018
Please read the patient information leaflet for this medicine fully before use:

Lamisil 250mg


Can I still drink alcohol?

Yes. There are no known interactions between Lamisil and alcohol.

Will I still be able to drive?

There is a chance that this medicine could interfere with your ability to drive or operate machinery. If you have concerns you should speak to your prescriber.

Can I take this medicine while pregnant?

No. The use of Lamisil whilst pregnant is not recommended. You should inform the prescribing doctor if you are pregnant, planning to get pregnant or are breastfeeding.

How should I store it?

Keep the tablets in their original packaging, out of direct light and below 25ºC. Store all medicines out of the reach of children.

Am I allergic to anything in the medicine?

If you are allergic to any of the following ingredients then you should not take Lamisil tablets: terbinafine, magnesium stearate, colloidal anhydrous silica, hydroxypropylmethylcellulose, sodium carboxymethyl starch and microcrystalline cellulose.

Is it available over-the-counter?

No. You can only purchase Lamisil with a prescription in the UK.

Is it right for me?

The treatment you use will be determined by your doctor following examination of your symptoms.

Please note we do not offer this medication on our site.


Page last reviewed:  14/06/2018
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