Valacyclovir (the pro‑drug of acyclovir) is one of the most widely distributed antiviral medicines worldwide, so a large number of pharmaceutical companies manufacture the tablets. The list below highlights the most prominent manufacturers, grouped by the brand name or generic status that is commonly encountered in the United States, Europe, and other major markets. (Note that the exact manufacturer you find on a package will vary by country, region, and whether the product is a branded or generic formulation.)
| Brand / Generic Formulation | Primary Manufacturer(s) | Notes |
|-----------------------------|-------------------------|-------|
| Valtrex® | GlaxoSmithKline (GSK) | The original branded product launched in the late 1990s. GSK still holds the U.S. brand rights. |
| Valcyte® | GSK (United States, Canada, Australia) | A higher‑dose (500 mg) formulation that is also branded by GSK in several markets. |
| Generic Valacyclovir (e.g., 250 mg, 500 mg, 1 g) | Teva Pharmaceuticals | One of the largest global generic manufacturers; active in the U.S., EU, and many other regions. |
| | Mylan / Viatris | Supplies generic valacyclovir in the U.S., Canada, and other markets. |
| | Sandoz (Boehringer Ingelheim) | Generic version sold under the name “Valcyte” or “Valacyclovir” in EU, U.S., and elsewhere. |
| | Sun Pharmaceutical Industries | Manufactures generic valacyclovir tablets for many countries, especially in India and the U.S. |
| | Cipla | Supplies generic valacyclovir in India, the U.S., and various other markets. |
| | Hikma Pharmaceuticals | Produces generic valacyclovir tablets for the U.S. and EU. |
| | AstraZeneca (Pharmaceuticals) – in collaboration with other partners | Has produced generic versions under different brand names in specific markets. |
| | Novartis (through Sandoz) | Offers generic valacyclovir in the U.S., EU, and other regions. |
| | Zydus Cadila | Supplies generic valacyclovir primarily in India and some export markets. |
| | Aurobindo Pharma | Produces generic valacyclovir tablets for the Indian market and exports. |
| | Pfizer (through partnership with other generic manufacturers) | Occasionally supplies generic valacyclovir in specific regions. |
| | Dr. Reddy's Laboratories | Manufactures generic valacyclovir for the Indian market and some global markets. |
| | Merewip (now part of Mylan/Viatris) | Historically a major generic valacyclovir supplier in the U.S. |
How to Identify the Manufacturer on Your Package
1. Look on the label – The manufacturer’s name is usually listed either below the brand name or at the bottom of the tablet box (e.g., “Made by Teva Pharmaceuticals”).
2. Check the National Drug Code (NDC) – The NDC is a unique 10‑digit number (in the U.S.) that can be searched online to see the manufacturer’s name and other product details.
3. Ask your pharmacist – If you’re uncertain, a pharmacist can quickly verify the manufacturer from the pharmacy’s inventory or from the drug’s packaging.
Important Points
- Brand vs. Generic: The branded versions (Valtrex®, Valcyte®) are exclusively produced by GSK (in most markets). All other manufacturers produce generic valacyclovir tablets.
- Quality and Regulation: In regulated markets (e.g., U.S., EU, Canada), all manufacturers must meet the same Good Manufacturing Practice (GMP) standards. The active ingredient, valacyclovir hydrochloride, is the same across all brands and generics.
- Dosage Forms: The common tablet strengths are 250 mg, 500 mg, and 1 g. Some manufacturers also produce oral suspension (liquid) or chewable tablets, but these are less common.
Quick Reference List (for the U.S. Market)
| Strength | Brand | Manufacturer |
|----------|-------|--------------|
| 250 mg | Valtrex® | GSK |
| 250 mg | Generic | Teva, Mylan/Viatris, Sun Pharma, Cipla, etc. |
| 500 mg | Valcyte® | GSK |
| 500 mg | Generic | Teva, Mylan/Viatris, Sun Pharma, etc. |
| 1 g | Generic | Teva, Mylan/Viatris, Sun Pharma, etc. |
Disclaimer: This information is provided for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider or pharmacist before starting or changing any medication regimen.