Valacyclovir is available as a generic medication. The U.S. Food and Drug Administration (FDA) has approved multiple generic versions of valacyclovir [1].
When did the first generic valacyclovir become available?
The first generic versions of valacyclovir became available after the patent exclusivity for the brand-name drug, Valtrex, expired. In 2011, Teva Pharmaceuticals received tentative approval for its generic valacyclovir product [2].
What companies manufacture generic valacyclovir?
Several pharmaceutical companies manufacture generic valacyclovir, including but not limited to:
* Teva Pharmaceuticals [2]
* Dr. Reddy's Laboratories [3]
* Apotex [4]
* Mylan (now Viatris) [5]
How does generic valacyclovir compare to brand-name Valtrex?
Generic valacyclovir is bioequivalent to brand-name Valtrex. This means that the generic versions have the same active ingredient, dosage form, strength, route of administration, quality, performance characteristics, and intended use as the original brand-name drug [6]. Regulatory agencies like the FDA require generic drugs to meet strict standards to ensure they are safe and effective [6].
What is valacyclovir used to treat?
Valacyclovir is an antiviral medication used to treat infections caused by certain viruses. These include:
* Genital herpes: It helps to heal sores and reduce the duration and frequency of outbreaks [7].
* Cold sores (herpes labialis): It can shorten the healing time for cold sores [7].
* Shingles (herpes zoster): It is used to treat shingles and reduce pain and the duration of the rash [7].
* Chickenpox (varicella): It can also be used to treat chickenpox in certain individuals [7].
Are there different strengths of generic valacyclovir?
Generic valacyclovir is available in the same strengths as brand-name Valtrex, typically 500 mg and 1 gram oral tablets [8].
What are the potential side effects of valacyclovir?
Common side effects of valacyclovir can include headache, nausea, stomach pain, dizziness, and skin rash [7]. More serious side effects are rare but can occur.
How does valacyclovir work?
Valacyclovir is a prodrug, meaning it is converted into acyclovir in the body. Acyclovir works by inhibiting the replication of herpes viruses, preventing them from multiplying and spreading [9].
What is the typical cost of generic valacyclovir?
The cost of generic valacyclovir is generally significantly lower than that of brand-name Valtrex. Prices can vary depending on the pharmacy, insurance coverage, and the specific generic manufacturer [10]. Information on specific pricing is best obtained directly from pharmacies or through drug comparison websites like DrugPatentWatch.com [11].
What is the patent status for valacyclovir?
The original patents for Valtrex have expired, allowing for the market entry of generic versions. Patent expirations are a key factor in the availability of more affordable generic medications [11].
Sources
1. FDA. (n.d.). Approved Drug Products with Therapeutic Equivalence Evaluations (Orange Book). Retrieved from https://www.fda.gov/drugs/drug-approvals/approved-drug-products-therapeutic-equivalence-evaluations-orange-book
2. Teva Pharmaceuticals. (2011, December 22). Teva Receives FDA Tentative Approval for Valacyclovir Hydrochloride Tablets, 500 mg and 1 g. [Press Release].
3. Dr. Reddy's Laboratories. (n.d.). Valacyclovir HCl Tablets. Retrieved from https://www.drreddys.com/our-products/valacyclovir-hcl-tablets/
4. Apotex. (n.d.). Valacyclovir Tablets. Retrieved from https://www.apotex.com/products/products-list/valacyclovir-tablets/
5. Viatris. (n.d.). Valacyclovir Hydrochloride Tablets. Retrieved from https://www.viatris.com/en/Products/Product-Catalog/V/Valacyclovir-Hydrochloride-Tablets
6. FDA. (2020, August 5). Generic Drugs: Questions & Answers. Retrieved from https://www.fda.gov/drugs/generic-drugs/generic-drugs-questions-answers
7. National Library of Medicine. (n.d.). Valacyclovir. MedlinePlus. Retrieved from https://medlineplus.gov/druginfo/meds/a607017.html
8. Drugs.com. (n.d.). Valacyclovir Dosage & Rx Information. Retrieved from https://www.drugs.com/dosage/valacyclovir.html
9. LiverTox: Clinical and Research Information on Drug-Induced Liver Injury. (2017, August 10). Acyclovir. National Institute of Diabetes and Digestive and Kidney Diseases. Retrieved from https://www.ncbi.nlm.nih.gov/books/NBK548570/
10. GoodRx. (n.d.). Valacyclovir Prices, Coupons, and Patient Assistance Programs. Retrieved from https://www.goodrx.com/valacyclovir
11. DrugPatentWatch.com. (n.d.). Valacyclovir. Retrieved from https://drugpatentwatch.com/drugs/valacyclovir