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Terbinafine is an antifungal medication used to treat fungal infections of the scalp, body, groin, feet, fingernails, and toenails. It is available in various forms, including tablets, cream, gel, spray, and oral granules, and is typically taken once daily. The duration of treatment depends on the type and severity of the infection, ranging from a few weeks to several months. It is important to follow the prescribed treatment duration and dosage to ensure the infection clears completely and prevent potential side effects.
| Characteristics | Values |
|---|---|
| Dosage | 250 mg once a day |
| Duration | 2 to 6 weeks, depending on the type and severity of the infection. Fungal nail infections may require several months of treatment. |
| Form | Tablets, cream, gel, spray, solution, oral granules |
| Administration | Tablets can be taken with or without food. Oral granules should be taken with food (sprinkled on a spoonful of pudding or other soft, non-acidic food). |
| Timing | Tablets should be taken at the same time each day. |
| Missed dose | If you forget to take a tablet, take it as soon as you remember, unless it's nearly time for your next dose. Do not take two doses to make up for a missed dose. |
| Side effects | May cause mild-to-moderate gastrointestinal symptoms. May also cause skin irritation or redness if cream, gel, or spray is overused. |
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What You'll Learn
Terbinafine dosage for nail fungus
Terbinafine is an antifungal medication used to treat fungal infections of the scalp, body, groin (jock itch), feet (athlete's foot), fingernails, and toenails. It is available in various forms, including tablets, cream, gel, spray, solution, and oral granules. The dosage and duration of treatment depend on the type and severity of the fungal infection being treated.
For toenail fungus, or onychomycosis, the typical dosage for adults is 250 milligrams (mg) once daily. The duration of treatment can vary, with some sources recommending 12 weeks, while others suggest 2 to 6 weeks depending on the severity of the infection. In a clinical study, patients with toenail onychomycosis who were treated with 250 mg of terbinafine daily for 12 weeks achieved an 82% cure rate, while those treated for 24 weeks had an 85% cure rate. Therefore, a longer duration of treatment may result in a higher cure rate.
For fingernail fungus, the dosage and duration of treatment with terbinafine may be similar to that of toenail fungus. However, it is important to follow the recommendations of your doctor or healthcare provider, as they will determine the appropriate dosage and duration based on the specifics of your condition.
Terbinafine tablets can be taken with or without food, but it is best to take them at the same time each day to maintain a constant amount of the drug in the blood. It is important to continue taking terbinafine as directed for the full course of treatment, even if your symptoms improve, to ensure the infection is completely cleared and prevent it from returning. If you miss a dose, take it as soon as you remember, unless it is almost time for your next dose. In this case, skip the missed dose and continue with your regular dosing schedule. Do not take two doses at once to make up for a missed dose.
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How long to take terbinafine tablets
The length of time you should take terbinafine tablets depends on the type and severity of your infection. Terbinafine is an antifungal medication used to treat fungal infections of the scalp, body, groin (jock itch), feet (athlete's foot), fingernails, and toenails.
If you are taking terbinafine tablets, the usual dose is one 250 mg tablet, taken once a day. For toenail fungus (onychomycosis), the typical treatment duration for adults is 12 weeks. However, some studies suggest that shorter treatment durations of 6 to 24 weeks can also be effective, with cure rates of 67% for 6 weeks, 82% for 12 weeks, and 85% for 24 weeks.
For other types of fungal infections, the treatment duration for adults and teenagers is usually 2 to 6 weeks. For example, for tinea cruris (jock itch) and tinea pedis (athlete's foot), the recommended treatment duration is 2 to 4 weeks.
It is important to follow your doctor's instructions and take the medication as directed. Keep taking the medication until you finish the prescribed course, even if your symptoms improve. Stopping the medication too soon or not taking it as recommended can cause the fungal infection to return. If you have any concerns or questions about your treatment, consult your doctor or pharmacist.
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Terbinafine cream, gel, or spray
Terbinafine is an antifungal medication that can be used to treat nail fungus. It is available as a cream, gel, spray, or tablet, and can also be administered via oral granules.
If you are using the cream, gel, or spray, you will usually need to apply it once or twice a day for 1 to 2 weeks. It is important to follow the instructions provided by your doctor or pharmacist, as the duration of treatment may vary depending on the severity and type of infection.
Before applying the cream or gel, be sure to wash your hands and the infected area, and dry thoroughly. If treating your feet, ensure you dry between your toes. Squeeze a small amount of the cream or gel onto your finger, enough to thinly cover the infected area.
It is important to continue using terbinafine for the full course of treatment, even if your symptoms improve. Discontinuing treatment early or not using the medication as recommended may result in the fungal infection returning. If you experience any side effects, such as skin irritation or redness, reduce the amount of cream, gel, or spray used.
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Side effects of terbinafine
While terbinafine is a medication used to treat fungal infections of the nails, scalp, body, groin, feet, and skin, it may cause certain side effects. It is important to take the medication exactly as directed by your doctor and to read the medication guide carefully.
Firstly, terbinafine may increase the effects of caffeine, leading to headaches, sleep disturbances, agitation, and increased urination. Therefore, it is advisable to limit caffeine intake while taking terbinafine.
Secondly, terbinafine can make your skin more sensitive to sunlight, increasing the risk of sunburns or rashes. It is recommended to wear protective clothing and sunscreen before going out in the sun.
Additionally, there is a small chance (less than 1 in 1000) that terbinafine can affect your liver. It is important to inform your doctor if you have a history of liver disease, as terbinafine can, in rare cases, cause severe liver damage or even liver failure.
Terbinafine may also interact with certain medications, such as cimetidine (Tagamet). Be sure to inform your doctor about any prescription or non-prescription medications, vitamins, or supplements you are taking to ensure the safe and effective use of terbinafine.
Furthermore, terbinafine can remain in your system for several months after stopping treatment, and its presence can be detected in nail clippings for many weeks. This prolonged presence of the drug can lead to potential interactions with other medications even after completing your antifungal treatment. Therefore, it is crucial to consult your pharmacist or healthcare provider before starting any new medications.
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Precautions when taking terbinafine
When taking terbinafine, it is important to follow the instructions provided by your doctor or pharmacist, as well as any patient instructions or medication guides included with the medicine. Be sure to read this information carefully.
Terbinafine is typically taken once a day for several weeks or months, depending on the type and severity of the fungal infection. It is important to take the medication at the same time every day and to complete the full course of treatment, even if your symptoms improve. Do not take extra medicine to make up for a missed dose. If you frequently miss doses, it may be helpful to set an alarm or ask your pharmacist for advice on other reminder methods.
Terbinafine may interact with other drugs, including prescription and over-the-counter medicines, vitamins, herbal products, and dietary supplements. Be sure to inform your doctor about all the medications and supplements you are currently taking. Additionally, inform your doctor if you smoke, drink alcohol, or use illegal drugs, as these substances may also interact with terbinafine.
Terbinafine can cause side effects such as stomach pain, nausea, vomiting, severe diarrhoea, dizziness, headache, and increased urination. It may also increase the effects of caffeine, so it is recommended to avoid or reduce caffeine intake while taking terbinafine. If you experience any side effects or symptoms of an allergic reaction, seek medical attention.
If you are breastfeeding, it is important to note that terbinafine can pass into breast milk and may harm the nursing baby. Therefore, it is advised not to breastfeed while using this medication.
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Frequently asked questions
The length of treatment depends on the type and severity of your infection. For toenail fungus, a treatment period of 12 weeks is usually sufficient. However, in some cases, it can take up to 24 weeks for complete cure.
Terbinafine tablets are typically taken once a day with or without food. It is important to take the medicine at the same time every day to maintain a constant amount in the blood.
If you miss a dose, take it as soon as you remember, unless it is almost time for your next dose. Do not take two doses at the same time to make up for a missed dose.
The adverse effects of terbinafine are usually mild to moderate gastrointestinal symptoms. Taking too much terbinafine cream, gel, or spray may cause skin irritation or redness. Taking too many tablets may result in stomach pain, nausea, diarrhoea, headaches, or dizziness.
