Valacyclovir is available as a generic medication manufactured by multiple companies. These include Teva Pharmaceuticals, Mylan, Aurobindo Pharma, and others [1].
Who Makes Brand-Name Valacyclovir?
The original brand-name formulation of valacyclovir is marketed as Valtrex by GlaxoSmithKline (GSK) [2].
When Did Valtrex Lose Patent Exclusivity?
Valtrex, the brand-name valacyclovir, lost its market exclusivity in the United States in 2013. This allowed generic manufacturers to begin producing and selling their own versions of the drug [3].
How Much Does Generic Valacyclovir Cost?
The cost of generic valacyclovir can vary depending on the manufacturer, dosage, and pharmacy. However, it is generally significantly less expensive than the brand-name Valtrex. Prices can range from under $10 to $50 or more for a prescription, depending on the quantity and insurance coverage [4].
What Are the Different Dosages of Valacyclovir?
Valacyclovir is typically prescribed in 500 mg and 1,000 mg (1 gram) oral tablets [5]. It is used to treat conditions such as herpes simplex virus infections, varicella-zoster virus (shingles), and cytomegalovirus infections [6].
What Are the Risks of Taking Valacyclovir?
Common side effects of valacyclovir can include headache, nausea, and dizziness [7]. More serious, though less common, side effects may involve kidney problems, confusion, or hallucinations. Patients with existing kidney disease may be at higher risk for these adverse effects [8].
Can I Switch Between Generic Valacyclovir Brands?
Switching between different generic manufacturers of valacyclovir is generally considered safe, as they are required to contain the same active ingredient in the same dosage. However, some individuals may experience slight differences in inactive ingredients, which could potentially lead to minor variations in tolerance for some patients [9].
How Does Valacyclovir Work?
Valacyclovir is an antiviral medication that works by blocking the replication of viruses within the body. It is converted into acyclovir in the body, which then inhibits viral DNA synthesis [6].