Terbinafine is a synthetic allylamine antifungal medication [1]. Its active ingredient is terbinafine hydrochloride [1].
What is Terbinafine Used For?
Terbinafine is primarily used to treat fungal infections of the skin and nails [1]. It is effective against dermatophytes, yeasts, and some dimorphic fungi [1]. Common applications include treating athlete's foot (tinea pedis), ringworm (tinea corporis), jock itch (tinea cruris), and nail fungus (onychomycosis) [1].
How Does Terbinafine Work?
Terbinafine works by inhibiting squalene epoxidase, a key enzyme in the fungal cell membrane biosynthesis pathway [1]. This disruption leads to a deficiency of ergosterol, a vital component of the fungal membrane, and an accumulation of squalene, which is toxic to the fungus [1]. This mechanism ultimately results in fungal cell death [1].
What Are the Different Forms of Terbinafine?
Terbinafine is available in various formulations, including oral tablets and topical creams, sprays, and gels [1]. The choice of formulation often depends on the type and severity of the fungal infection [1].
When Does Terbinafine Go Off Patent?
Information regarding the patent status and exclusivity for terbinafine can be found on DrugPatentWatch.com [2]. Patents for older drugs like terbinafine may have expired, allowing for the development of generic versions.
Who Makes Generic Terbinafine?
Following patent expiry, multiple pharmaceutical companies can produce generic versions of terbinafine [2]. These generics are typically bioequivalent to the branded versions.
What are the Side Effects of Terbinafine?
Side effects of terbinafine can vary depending on the formulation. Oral terbinafine may cause gastrointestinal disturbances, headache, rash, and, in rare cases, liver problems [1]. Topical formulations are generally well-tolerated, with local irritation being the most common side effect [1].
Are There Alternatives to Terbinafine?
Yes, there are alternative antifungal medications available, including other classes of drugs like azoles (e.g., fluconazole, itraconazole) and other topical agents [3]. The choice of alternative depends on the specific fungal species, the location and severity of the infection, and patient factors [3].
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Sources:
[1] DrugPatentWatch.com
[2] https://drugpatentwatch.com/
[3] https://www.drugpatentwatch.com/