See the DrugPatentWatch profile for Griseofulvin
Griseofulvin is an antifungal medication used to treat a variety of fungal infections, primarily those affecting the skin, hair, and nails. It works by interfering with the fungal cell's ability to divide, effectively stopping its growth.
How does Griseofulvin work to treat fungal infections?
Griseofulvin is absorbed by the skin, hair, and nails. It then binds to microtubules within fungal cells, disrupting the mitotic spindle and preventing cell division [1]. This mechanism halts the reproduction of fungi, allowing the body to eliminate the infection.
What types of infections is Griseofulvin prescribed for?
Griseofulvin is commonly prescribed for superficial fungal infections such as ringworm (tinea corporis), athlete's foot (tinea pedis), jock itch (tinea cruris), and infections of the scalp (tinea capitis) and nails (onychomycosis) [2]. It is particularly effective for dermatophyte infections.
How long does a Griseofulvin treatment typically last?
The duration of treatment with griseofulvin varies depending on the location and severity of the fungal infection. Infections of the skin may require several weeks of treatment, while nail infections can take many months, as long as it takes for the infected nail to grow out and be replaced [3].
What are the potential side effects of taking Griseofulvin?
Common side effects of griseofulvin can include gastrointestinal issues such as nausea, vomiting, and diarrhea. Headaches, dizziness, fatigue, and skin rashes are also reported. Less common but more serious side effects may include liver problems, severe skin reactions, and blood disorders [4]. Patients with a history of porphyria or liver disease should use griseofulvin with caution [3].
Are there any drug interactions with Griseofulvin?
Griseofulvin can interact with several medications. It may reduce the effectiveness of anticoagulant drugs like warfarin. It can also interact with barbiturates and cyclosporine. Because griseofulvin is metabolized by the liver, drugs that induce or inhibit liver enzymes can affect griseofulvin levels [4]. It is important for patients to inform their healthcare provider about all medications they are taking.
What is the patent status for Griseofulvin?
Griseofulvin has been available as a generic medication for many years. The original patents for griseofulvin have long expired, meaning that no specific company holds exclusive patent rights for the drug itself [5].
When does Griseofulvin's market exclusivity expire?
As Griseofulvin is an established generic drug, its market exclusivity expired long ago. This allows for the production and sale of generic versions by multiple pharmaceutical companies without the need for new patent filings for the active ingredient [5].