Description
FC-FAST 500 | Terbinafine 500mg Tablet
FC-Fast 500 is a Terbinafine 500mg tablet by Arrowin Pharmaceuticals, prescribed for the treatment of fungal infections of the skin, scalp and nails. Dermatologists across India rely on Terbinafine as a first-line oral antifungal for conditions that have not responded adequately to topical treatment alone or where the infection is too widespread or deep-seated for topical agents to be effective.
Terbinafine belongs to the allylamine class of antifungals. It works by inhibiting squalene epoxidase, an enzyme essential in the fungal cell membrane synthesis pathway. This inhibition causes squalene to accumulate within the fungal cell to toxic levels while simultaneously depleting ergosterol, the sterol that maintains fungal cell membrane integrity. The result is fungal cell death rather than just growth inhibition, which is why Terbinafine is classified as fungicidal rather than merely fungistatic. In practical terms, this means shorter treatment courses and lower relapse rates compared to older antifungals like Griseofulvin.
The 500mg strength of FC-Fast 500 makes it particularly suited for dermatophyte infections of the nail, where achieving adequate drug concentrations in the nail plate requires higher dosing than standard skin infections. Terbinafine has a strong affinity for keratin-rich tissue and accumulates in the nail, skin and hair follicles, persisting at therapeutic levels long after the treatment course is complete. This prolonged tissue retention is what allows a defined oral course to clear nail infections that would otherwise require months of topical therapy with inconsistent results.
Composition
Each tablet contains Terbinafine Hydrochloride IP equivalent to Terbinafine 500mg.
Therapeutic Class
Allylamine Antifungal.
Indications
FC-Fast 500 is indicated for dermatophyte infections of the nails, including onychomycosis of the toenails and fingernails, tinea corporis, tinea cruris, tinea pedis and tinea capitis caused by dermatophyte fungi. It is also used to treat cutaneous candidiasis and pityriasis versicolor when oral therapy is clinically warranted.
Dosage and Administration
The standard adult dose for skin infections is one FC-Fast 500 tablet taken orally once daily for 2 to 4 weeks, depending on the site and severity of infection. For nail infections, the recommended course is 6 weeks for fingernail onychomycosis and 12 weeks for toenail onychomycosis. Always follow the prescribing physician’s dosage and duration instructions.
Packaging
10x1x4 Blister Pack.
Are There Any Side Effects of FC-Fast 500?
FC-Fast 500 is generally well tolerated. The most commonly reported side effects are gastrointestinal, including nausea, stomach discomfort, diarrhoea and loss of appetite, which are usually mild and transient. Some patients report headache or skin rash during the course of treatment.
Taste disturbance is a less common but notable side effect of Terbinafine, where patients may experience a temporary alteration or loss of taste sensation. This typically resolves after completion of the course, but should be monitored. Rarely, Terbinafine has been associated with hepatic side effects, including elevated liver enzymes. It should be used with caution in patients with pre-existing liver disease and is contraindicated in patients with active or chronic hepatic conditions. Liver function should be monitored in patients on prolonged therapy. Always use under physician supervision.
FAQs
What is FC-Fast 500 used for?
FC-Fast 500 is a Terbinafine 500mg tablet used to treat fungal infections of the nails, skin and scalp. It is commonly prescribed for nail fungal infections (onychomycosis), ringworm, athlete’s foot, jock itch and scalp fungal infections caused by dermatophyte organisms.
Why is Terbinafine 500mg prescribed instead of topical antifungals?
Topical antifungals are effective for superficial skin infections but cannot penetrate nail tissue adequately or reach deeper skin layers in widespread infections. Terbinafine in oral form accumulates in keratin-rich tissue, including nails, skin and hair follicles, reaching concentrations that clear infections topical agents simply cannot address. For nail fungal infections in particular, oral Terbinafine is the standard of care.
How long does it take for FC-Fast 500 to work?
For skin infections, noticeable improvement typically occurs within 2 to 4 weeks. For nail infections, the nail takes time to grow out and replace the infected portion, so visible clearing may take several months after completing the course, even though the fungus is eliminated. Terbinafine continues to work from the nail tissue long after the last dose is taken.
Is FC-Fast 500 safe for long-term use?
Terbinafine courses for nail infections run for 6 to 12 weeks, depending on whether fingernails or toenails are affected. This is the standard treatment duration. Patients with liver disease should be assessed before starting therapy, and liver function should be monitored during therapy. Always follow the physician’s prescribed course duration.
Is FC-Fast 500 available for PCD Pharma Franchise?
Yes. FC-Fast 500 is available for PCD distribution with monopoly rights across territories. Contact Arrowin Pharmaceuticals to discuss franchise opportunities in your region.
To learn more about Terbinafine and its uses, read our detailed guide on the Top Terbinafine Tablets in India:Â Read Now
