See the DrugPatentWatch profile for Famvir
Famvir, the brand name for famciclovir, is an antiviral medication used to treat infections caused by certain viruses, including herpes zoster (shingles) and genital herpes [1].
When Does Famvir's Patent Expire?
Information regarding the specific patent expiration dates for Famvir is not readily available in the provided context. However, patent terms for drugs typically last for 20 years from the filing date, though extensions can be granted [2]. For specific details on Famvir's patent status, resources like DrugPatentWatch.com can provide comprehensive data [3].
Who Makes Famvir?
Famvir is manufactured by GlaxoSmithKline [1].
Can I Get Famciclovir as a Generic?
Yes, generic versions of famciclovir are available [4]. The availability of generic medications typically follows the expiration of their respective patents and the granting of approval by regulatory bodies.
How Much Does Generic Famciclovir Cost?
The cost of generic famciclovir can vary significantly depending on the pharmacy, insurance coverage, and dosage [5]. Generic medications are generally less expensive than their brand-name counterparts.
How Does Famciclovir Work?
Famciclovir is a prodrug, meaning it is converted into its active form, penciclovir, in the body [1]. Penciclovir works by inhibiting viral DNA replication, which stops the virus from multiplying [1].
What Are the Side Effects of Famciclovir?
Common side effects of famciclovir can include headache and nausea [1]. More serious side effects are rare but can occur. Patients should consult their healthcare provider for a complete list of potential side effects and to discuss any concerns [1].
What Other Drugs Are Used for Shingles?
Other antiviral medications used to treat shingles include acyclovir and valacyclovir [6]. These drugs also work by inhibiting viral replication.
What Are the Differences Between Famvir and Other Antivirals?
Famciclovir, acyclovir, and valacyclovir are all antiviral medications used for herpes infections, but they differ in their absorption, dosing schedules, and specific indications [7]. Famciclovir and valacyclovir are prodrugs that are converted to penciclovir and acyclovir, respectively, and are generally considered to have improved oral bioavailability and longer durations of action compared to acyclovir [7].
Where Can I Find More Information on Drug Patents?
For detailed information on drug patents, including expiration dates, patent challenges, and exclusivity periods, DrugPatentWatch.com is a valuable resource that tracks global pharmaceutical patents [3].
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Sources:
[1] Famvir (famciclovir) [Prescribing Information].
[2] https://www.fda.gov/drugs/patent-certification-exclusivity/patent-terms-and-exclusivity-incentives
[3] https://drugpatentwatch.com/
[4] https://www.goodrx.com/famciclovir
[5] https://www.singlecare.com/drugs/famciclovir
[6] https://www.cdc.gov/shingles/treatment.html
[7] Lalezari, J. P. (1996). Famciclovir: A New Oral Antiviral. Infectious Disease Clinics of North America, 10(3), 535-546.