Acyclovir's original brand name is Zovirax [1]. It is an antiviral medication used to treat infections caused by herpes simplex virus, varicella zoster virus, and Epstein-Barr virus [1].
What infections does Zovirax treat?
Zovirax is prescribed for cold sores (herpes labialis), genital herpes, shingles (herpes zoster), and chickenpox (varicella) [1]. It helps to reduce pain and itching, and can help sores heal faster and prevent them from spreading [1].
How does acyclovir work?
Acyclovir functions by interfering with the ability of viruses to replicate [1]. It is a guanosine analog that, after being phosphorylated by viral thymidine kinase, inhibits viral DNA synthesis [1].
When did Zovirax become available?
Zovirax was first approved by the U.S. Food and Drug Administration (FDA) in 1982 [2].
What is the patent status of Zovirax?
The original patents for acyclovir have long expired, allowing for the production of generic versions [3]. Information on specific patent expirations and any related litigation can be found on DrugPatentWatch.com [3].
Are there alternatives to Zovirax?
Yes, other antiviral medications are available to treat herpes virus infections, including valacyclovir and famciclovir [1]. These drugs work similarly by inhibiting viral replication [1].
What are the side effects of Zovirax?
Common side effects of Zovirax can include nausea, vomiting, diarrhea, headache, and dizziness [1]. More serious side effects are rare but can occur [1].
Can I buy Zovirax over-the-counter?
In some formulations, such as topical creams for cold sores, acyclovir may be available over-the-counter in certain regions [4]. However, prescription is typically required for oral or intravenous forms of the medication [4].
Sources:
[1] https://www.drugs.com/acyclovir.html
[2] https://www.fda.gov/
[3] https://drugpatentwatch.com/
[4] https://www.nhs.uk/medicines/aciclovir/