About terbinafine hcl
Allylamine antifungal
Used for
- Fungal nail infections
- Certain fungal skin infections, including ringworm and athlete’s foot
Usual adult dose
Nail infections: 250 mg once daily, usually 6 weeks for fingernails or 12 weeks for toenails. Skin infections: often once daily for 2–6 weeks.
Usual dose in children
For children aged 4 years and older, dosing is weight-based and usually once daily; duration depends on infection.
Common side effects
- Diarrhea or indigestion
- Headache
- Rash or itching
- Changes in taste or smell
Important warnings
- Rarely causes serious liver injury; liver problems may also affect taste or smell.
- Seek urgent care for yellow skin, dark urine, severe rash, or breathing difficulty.
- May require liver tests and review of other medicines.
- Tablets are not suitable for every fungal skin infection; diagnosis matters.
Pregnancy
Use during pregnancy only when clearly needed; discuss risks with a healthcare professional.
Breastfeeding
Terbinafine passes into breast milk; avoid use while breastfeeding unless a clinician recommends it.
Interactions
- Rifampin can reduce terbinafine levels.
- Cimetidine can increase terbinafine levels.
- May affect warfarin and some antidepressants or heart medicines.
- Tell clinicians about all medicines and supplements.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.