Indications
Lamisil (active ingredient: terbinafine) is a prescription medication indicated for the following:
- Onychomycosis: Lamisil is used for the treatment of onychomycosis (fungal infection of the toenails or fingernails) caused by dermatophytes.
- Tinea Infections: It is indicated for the treatment of tinea infections, including tinea pedis (athlete's foot), tinea cruris (jock itch), and tinea corporis (ringworm).
Lamisil belongs to a class of drugs known as antifungals, which work by inhibiting the growth of fungi and thereby treating the infection.
Uses and Dosage
Lamisil is available in tablet form to be taken orally with or without food, typically once a day or as directed by your doctor. The length of treatment and dosage depends on factors such as your medical condition and response to treatment. Take the medication exactly as directed by your doctor and complete the full course of treatment.
For a typical dosing regimen for Terbinafine (Lamisil) for fungal nail infections is one 250 mg tablet by mouth once daily. The duration of treatment is 6 weeks for fingernail infections and 12 weeks for toenail infections.
Side Effects
Common Side Effects of Lamisil (Terbinafine):
- Abnormal liver function tests
- Dark urine
- Gas
- Headache
- Rash
- Stomach pain or upset
- Tiredness
- Upper stomach pain
- Vomiting
Serious Side Effects of Lamisil (Terbinafine):
- Changes in your sense of taste or smell
- Depressed mood
- Easy bruising
- Feeling anxious or restless
- Lack of interest in daily activity
- Pale skin
- Purple or red pinpoint spots under your skin
- Sleep problems
- Unusual bleeding (nose, mouth, vagina or rectum)
- Weight loss due to taste changes or loss of appetite
Form and Strength
Lamisil (Terbinafine) is available in the following forms and strengths:
Lamisil: Tablet
- 250 mg
Terbinafine: Tablet
- 250 mg
Caution
- Liver failure, sometimes leading to liver transplant or death, risk associated with the use of oral terbinafine, which is the active ingredient in Lamisil Tablets. If signs of liver injury develop, stop taking Lamisil Tablets.
- Do not use Lamisil Tablets in patients with chronic or active liver disease. Before prescribing the medication, perform liver function tests as hepatotoxicity can occur in patients with and without pre-existing liver disease.
- Inform your doctor or pharmacist about your medical history before using Lamisil. This includes any history of immune system problems, kidney disease, liver disease, and lupus, as these conditions may affect the suitability of using Lamisil or require adjustments to the dosage.
- Be aware that using Lamisil may increase your sensitivity to the sun. To minimize the risk of sunburn or skin blisters/redness, limit your time in the sun, avoid tanning booths and sunlamps, wear protective clothing when outdoors, and use sunscreen.
- If you are pregnant and have a fungal nail infection, use Lamisil only in cases where it is essential. Treatment for this type of infection can be delayed until after birth. However, discuss with your doctor the potential risks and benefits of using the medication during pregnancy.
Frequently Asked Questions (FAQ)
How does terbinafine work?
Terbinafine works by interfering with the production of a component of the fungal cell wall, leading to its eventual destruction.
Can terbinafine be used for toenail fungus?
Yes, terbinafine can be used to treat toenail fungus infections, but it typically requires a longer treatment course than other types of fungal infections and may take several months to see results.
Can terbinafine be used during pregnancy?
Terbinafine is generally not recommended during pregnancy unless the potential benefits outweigh the potential risks to the fetus. It is important to discuss the use of any medication during pregnancy with a healthcare professional.
How long does it take for terbinafine to work?
The length of time it takes for terbinafine to work depends on the type and severity of the fungal infection being treated. In general, skin infections may start to improve within a few days to a week of treatment, while toenail fungus may take several months to see results.
Resources
- https://www.drugs.com/lamisil.html
- https://www.webmd.com/drugs/2/drug-12422/lamisil-oral/details
- https://www.rxlist.com/lamisil-drug.htm
- https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=a9f8dfc5-8891-43bd-8fd9-9c61d78f2e64
- https://www.goodrx.com/lamisil
- https://www.accessdata.fda.gov/drugsatfda_docs/label/2012/020539s021lbl.pdf
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