Terbinafine tablets
Lamisil
Peer reviewed by Sid DajaniLast updated by Michael Stewart, MRPharmSLast updated 24 Jan 2025
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Terbinafine is prescribed to treat fungal nail or skin infections.
Take one tablet each day.
The most common side-effects are loss of appetite, indigestion, feeling sick (nausea), diarrhoea, and aches and pains. These are usually mild and don't last long.
At a glance
Terbinafine is an antifungal medicine used to treat fungal infections, including fungal nail and skin infections.
It works by killing the fungus that causes the infection.
Take one tablet daily, with or without food, exactly as your doctor tells you.
Important information about your health and other medicines should be discussed with your doctor before starting terbinafine.
Possible side-effects include nausea, diarrhoea, headache, and skin rash.
Always complete the full course of treatment to prevent the infection from returning.
Seek medical attention immediately if you develop a severe rash with blisters or yellowing of the skin or eyes.
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About terbinafine
Type of medicine | An antifungal medicine |
Used for | Fungal infections |
Also called | Lamisil® |
Available as | Tablets |
Terbinafine is prescribed to treat fungal infections in adults. It is commonly prescribed for fungal nail infections and is sometimes prescribed for fungal skin infections. It works by killing the fungus causing the infection.
Before taking terbinafine
Back to contentsSome medicines are not suitable for people with certain conditions, and sometimes a medicine can only be used if extra care is taken. For these reasons, before you start taking terbinafine it is important that your doctor knows:
If you are pregnant or breastfeeding.
If you have a problem with the way your liver works, or if you have a problem with the way your kidneys work.
If you have a skin condition called psoriasis.
If you have been told you have an autoimmune disorder, such as lupus erythematosus.
If you are taking or using any other medicines. This includes any medicines you are taking which are available to buy without a prescription, as well as herbal and complementary medicines.
If you have ever had an allergic reaction to a medicine.
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How to take terbinafine
Back to contentsBefore you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about terbinafine, and will also provide you with a full list of side-effects which you could experience from taking it.
Take the tablets exactly as your doctor tells you to. It is usual to take one 250 mg tablet a day. You can take the tablet either before or after food.
Keep taking a tablet every day until the course is finished; otherwise, your infection may come back. Your course of treatment could last from two weeks to three months, depending upon where your infection is.
Try to take the tablet at the same time of day each day, as this will help you to remember to take your doses regularly.
If you do forget to take a tablet, take it as soon as you remember. If you do not remember until the following day, leave out the forgotten dose from the previous day and take the dose that is due as normal. Do not take two doses on the same day to make up for a missed dose.
Getting the most from your treatment
Back to contentsIf you buy any medicines 'over the counter', always check with a pharmacist that they are suitable for you to take with your prescribed medicines.
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Can terbinafine cause problems?
Back to contentsAlong with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains the most common ones associated with terbinafine. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any continue or become troublesome.
Very common terbinafine side-effects (these affect more than 1 in 10 people) | What can I do if I experience this? |
Lack of appetite | If troublesome, speak with your doctor |
Feeling sick (nausea), indigestion, feeling bloated, stomach ache | Stick to simple foods - avoid rich or spicy meals |
Diarrhoea | Drink plenty of water to replace any lost fluids |
Headache, joint and muscle aches and pains | Drink plenty of water and ask your pharmacist to recommend a suitable painkiller. If the aches continue, let your doctor know |
Skin rash and itching | If troublesome, speak with your doctor |
Important: if you develop a severe skin rash with blisters, or any yellowing of your skin or the whites of your eyes (jaundice), you should speak with your doctor straightaway. These are rare but possibly serious side-effects of terbinafine.
If you experience any other symptoms which you think may be due to the tablets, speak with your doctor or pharmacist for further advice.
How to store terbinafine
Back to contentsKeep all medicines out of the reach and sight of children.
Store in a cool, dry place, away from direct heat and light.
Important information about all medicines
Back to contentsImportant information about all medicines
Never take more than the prescribed dose. If you suspect that you or someone else might have taken an overdose of this medicine, go to the accident and emergency department of your local hospital at once. Take the container with you, even if it is empty.
This medicine is for you. Never give it to other people even if their condition appears to be the same as yours.
If you are due to have an operation or dental treatment, please tell the person carrying out the treatment which medicines you are taking.
Do not keep out-of-date or unwanted medicines. Take them to your local pharmacy which will dispose of them for you.
If you have any questions about this medicine ask your pharmacist.
Report side effects to a medicine or vaccine
If you experience side effects, you can report them online through the Yellow Card website.

Unsure about mixing medicines?
Check for possible interactions between medicines, supplements and foods before taking them together.
Frequently asked questions
What types of fungal infections does terbinafine treat?
Terbinafine is prescribed for fungal infections in adults. It is commonly used for fungal nail infections and can also be prescribed for fungal skin infections.
How does terbinafine work to clear up fungal infections?
Terbinafine works by directly killing the fungus that is causing the infection.
Can I take terbinafine if I have liver or kidney problems?
If you have a problem with your liver or kidneys, it is important to inform your doctor before starting terbinafine. Extra care may be needed in such cases.
What should I do if I forget to take a dose of my terbinafine?
If you forget to take a tablet, take it as soon as you remember. However, if you don't remember until the next day, skip the missed dose from the previous day. Just take your next dose as normal. Do not take two doses on the same day to make up for a forgotten dose.
Are there any serious side-effects I should be aware of when taking terbinafine?
While rare, two serious side-effects to watch out for are a severe skin rash with blisters or any yellowing of your skin or the whites of your eyes (jaundice). If you notice either of these, you should speak with your doctor straightaway.
How long will I need to take terbinafine?
The length of your treatment course can vary depending on where your infection is, but it could range from two weeks to three months.
Is it important to finish the entire course of terbinafine, even if my symptoms improve?
Yes, it is important to keep taking the tablets every day until your course is finished. If you stop early, your infection may return.
Further reading and references
- Manufacturer's PIL, Lamisil® Tablets 250 mg; Novartis Pharmaceuticals UK Ltd, The electronic Medicines Compendium. Dated September 2020.
- Medicines Complete BNF 89th Edition; British Medical Association and Royal Pharmaceutical Society of Great Britain, London.
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About the authorView full bio

Michael Stewart, MRPharmS
Medicine Leaflet Review Manager – Contractor, Pharmacist
BPharm (Hons), MRPharmS
Michael is a community pharmacist practicing in the Midlands and South Yorkshire with more than 20 years’ experience advising on medicines and medical conditions. He has a strong background in healthcare training, having produced and delivered training courses for pharmacy teams and staff of residential care settings, including nurses. He has also contributed to pharmacy advisory boards for the management of low acuity conditions in the community.
About the reviewer

Sid Dajani
Sultan Dajani qualified at the London School of Pharmacy in 1994 and became the youngest elected member of the Royal Pharmaceutical Society council since its founding in 1842.
Article history
The information on this page is written and peer reviewed by qualified clinicians.
Next review due: 24 Jan 2028
24 Jan 2025 | Latest version

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