Terbinafine HCL 250mg
Generic For: Lamisil
Terbinafine HCL 250mg (brand name Lamisil) is a prescription oral antifungal tablet used to treat fungal infections of the toenails and fingernails, known as onychomycosis. After a licensed provider reviews your information and confirms a valid prescription, your medication ships directly from a licensed U.S. pharmacy.
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30-day supply · $0.83/tablet
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Terbinafine HCL (Lamisil) is an oral antifungal for toenail fungus and fingernail fungus (onychomycosis)
Terbinafine HCL 250mg Quick Facts
| Drug class | Allylamine antifungal |
|---|---|
| Treats | Toenail fungus, fingernail fungus (onychomycosis) |
| Form | Tablet |
| Typical dosing | Take 1 tablet by mouth daily for 2-12 weeks. |
| Prescription required | Yes — prescription only |
What Is Terbinafine HCL 250mg?
Terbinafine HCL is an oral antifungal medication in the allylamine class, sold under the brand name Lamisil. It works by blocking an enzyme fungi need to build their cell membranes, which stops fungal growth. Terbinafine HCL 250mg tablets are FDA-approved to treat onychomycosis — fungal infections of the toenails or fingernails caused by dermatophytes. Because nails grow slowly, full results are typically seen months after the treatment course is completed.
What Does Terbinafine HCL 250mg Treat?
Toenail fungus (onychomycosis of the toenail)
Fingernail fungus (onychomycosis of the fingernail)
Dermatophyte nail infections confirmed by testing
Sometimes prescribed off-label for other dermatophyte infections at provider discretion
Terbinafine HCL 250mg Dosage
Fingernail onychomycosis: 250 mg by mouth once daily for 6 weeks.
Toenail onychomycosis: 250 mg by mouth once daily for 12 weeks.
Your prescriber will determine the dose and duration that are right for you. Always follow the directions on your prescription label.
Terbinafine HCL 250mg Side Effects
Common side effects
- Headache
- Diarrhea
- Upset stomach or indigestion
- Rash
- Taste disturbance or taste loss
- Nausea
- Abdominal pain
- Itching
Serious side effects
Stop taking this medication and seek medical attention right away if you experience:
- Signs of liver injury (dark urine, jaundice, persistent nausea, fatigue)
- Severe skin reactions (Stevens-Johnson syndrome, blistering, peeling)
- Persistent taste or smell loss
- Depression or mood changes
- Signs of low white blood cell count (fever, sore throat, infections)
- Allergic reaction (swelling of face or throat, difficulty breathing)
Warnings & Interactions
Not recommended for patients with chronic or active liver disease
Liver function tests are advised before starting treatment
Stop and seek care if symptoms of liver injury or severe skin reaction occur
May cause taste or smell disturbance that can be prolonged or permanent
Can interact with drugs metabolized by CYP2D6 (e.g., certain antidepressants, beta-blockers)
Caffeine levels may increase; cyclosporine levels may decrease
Tell your provider about all medications and any history of lupus or depression
Tell your prescriber about all medications, supplements, and health conditions before starting terbinafine hcl 250mg.
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