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Last Updated: March 27, 2026

CLINICAL TRIALS PROFILE FOR VALACYCLOVIR HYDROCHLORIDE


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505(b)(2) Clinical Trials for VALACYCLOVIR HYDROCHLORIDE

This table shows clinical trials for potential 505(b)(2) applications. See the next table for all clinical trials
Trial Type Trial ID Title Status Sponsor Phase Start Date Summary
New Formulation NCT01689285 ↗ Bioequivalence Study in Healthy Volunteers of a New Paediatric Formulation of Valacyclovir Completed Radboud University Phase 1 2013-12-01 A new paediatric formulation (oral liquid) has been developed for flexible and accurate dosing of valacyclovir in children. To establish the bioavailability of this new formulation, healthy volunteers will be exposed to the new formulation and to valacyclovir tablets. The concentration of valacyclovir in their blood after exposure to the oral liquid will be measured and compared to the tablet.
>Trial Type >Trial ID >Title >Status >Phase >Start Date >Summary

All Clinical Trials for VALACYCLOVIR HYDROCHLORIDE

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00001038 ↗ A Study of Valacyclovir Hydrochloride in the Prevention of Life-Threatening Cytomegalovirus Disease in HIV-Infected Patients Completed Glaxo Wellcome Phase 3 1969-12-31 PRIMARY: To evaluate the efficacy of valacyclovir hydrochloride (BW 256U87) in the prevention of cytomegalovirus (CMV) end-organ disease in HIV/CMV co-infected patients with CD4+ lymphocytes < 100 cells/mm3. To assess the impact of BW 256U87, high-dose oral acyclovir and low-dose oral acyclovir on survival. SECONDARY: To evaluate the effect of BW 256U87 on quality of life, the safety of the drug administered concurrently with standard antiretroviral agents and other essential therapies for the treatment and prevention of opportunistic diseases, and the efficacy of BW 256U87 in suppressing activation of other herpesviruses. To evaluate serologic and virologic risk factors for the development of CMV disease, including assessment of HIV activation, and the risk of developing drug-resistant CMV, HSV, and VZV. Gastrointestinal absorption of acyclovir is not high enough to prevent CMV disease in patients with advanced HIV disease, although there is evidence that high doses of the drug may extend survival. Valacyclovir, a prodrug that is rapidly converted to acyclovir after oral administration, has a higher absorption rate and may therefore provide inhibitory activity against CMV.
NCT00001038 ↗ A Study of Valacyclovir Hydrochloride in the Prevention of Life-Threatening Cytomegalovirus Disease in HIV-Infected Patients Completed National Institute of Allergy and Infectious Diseases (NIAID) Phase 3 1969-12-31 PRIMARY: To evaluate the efficacy of valacyclovir hydrochloride (BW 256U87) in the prevention of cytomegalovirus (CMV) end-organ disease in HIV/CMV co-infected patients with CD4+ lymphocytes < 100 cells/mm3. To assess the impact of BW 256U87, high-dose oral acyclovir and low-dose oral acyclovir on survival. SECONDARY: To evaluate the effect of BW 256U87 on quality of life, the safety of the drug administered concurrently with standard antiretroviral agents and other essential therapies for the treatment and prevention of opportunistic diseases, and the efficacy of BW 256U87 in suppressing activation of other herpesviruses. To evaluate serologic and virologic risk factors for the development of CMV disease, including assessment of HIV activation, and the risk of developing drug-resistant CMV, HSV, and VZV. Gastrointestinal absorption of acyclovir is not high enough to prevent CMV disease in patients with advanced HIV disease, although there is evidence that high doses of the drug may extend survival. Valacyclovir, a prodrug that is rapidly converted to acyclovir after oral administration, has a higher absorption rate and may therefore provide inhibitory activity against CMV.
NCT00001054 ↗ The Safety and Effectiveness of Valacyclovir HCl in the Treatment of Herpes Simplex or Varicella/Zoster Infections in HIV-1 Infected Children Withdrawn Glaxo Wellcome Phase 1 1969-12-31 To obtain tolerance, safety, and pharmacokinetic data for oral valacyclovir hydrochloride ( 256U87 ) in HIV-1 infected children with herpes simplex virus infections ( cold sores ) and/or varicella / zoster virus infections ( chicken pox / shingles ). Varicella and zoster are common problems in HIV-infected children. It is believed that chronic oral therapy with acyclovir may result in subtherapeutic concentrations of acyclovir, resulting in resistance to that drug. Valacyclovir hydrochloride, which converts to acyclovir in the body, increases acyclovir bioavailability by 3-5 fold.
NCT00001054 ↗ The Safety and Effectiveness of Valacyclovir HCl in the Treatment of Herpes Simplex or Varicella/Zoster Infections in HIV-1 Infected Children Withdrawn National Institute of Allergy and Infectious Diseases (NIAID) Phase 1 1969-12-31 To obtain tolerance, safety, and pharmacokinetic data for oral valacyclovir hydrochloride ( 256U87 ) in HIV-1 infected children with herpes simplex virus infections ( cold sores ) and/or varicella / zoster virus infections ( chicken pox / shingles ). Varicella and zoster are common problems in HIV-infected children. It is believed that chronic oral therapy with acyclovir may result in subtherapeutic concentrations of acyclovir, resulting in resistance to that drug. Valacyclovir hydrochloride, which converts to acyclovir in the body, increases acyclovir bioavailability by 3-5 fold.
NCT00002000 ↗ A Study to Compare the Efficacy and Safety of Valacyclovir Hydrochloride ( 256U87 ) Versus Acyclovir in the Treatment of Recurrent Anogenital Herpes Infections in HIV Infected Patients Completed Glaxo Wellcome N/A 1969-12-31 To evaluate the safety and efficacy of oral valacyclovir hydrochloride (256U87) vs. acyclovir in the treatment of recurrent anogenital herpes in HIV-infected patients (CD4 greater than or equal to 100).
NCT00002084 ↗ A Comparative Trial of Valacyclovir Hydrochloride ( 256U87 ) and Acyclovir for the Suppression of Anogenital Herpes Infections in HIV-Infected Patients Completed Glaxo Wellcome N/A 1969-12-31 To determine the safety and efficacy of oral valacyclovir hydrochloride ( 256U87 ) compared to acyclovir in the treatment of recurrent anogenital herpes in HIV-infected patients with CD4 counts = or > 100 cells/mm3.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for VALACYCLOVIR HYDROCHLORIDE

Condition Name

Condition Name for VALACYCLOVIR HYDROCHLORIDE
Intervention Trials
Herpes Simplex 13
HIV Infections 13
Herpes Zoster 11
Healthy 9
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Condition MeSH

Condition MeSH for VALACYCLOVIR HYDROCHLORIDE
Intervention Trials
Herpes Simplex 31
Infection 20
Infections 19
HIV Infections 18
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Clinical Trial Locations for VALACYCLOVIR HYDROCHLORIDE

Trials by Country

Trials by Country for VALACYCLOVIR HYDROCHLORIDE
Location Trials
United States 304
Canada 28
India 5
Taiwan 4
France 4
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Trials by US State

Trials by US State for VALACYCLOVIR HYDROCHLORIDE
Location Trials
Texas 37
California 17
Washington 14
Pennsylvania 13
Maryland 13
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Clinical Trial Progress for VALACYCLOVIR HYDROCHLORIDE

Clinical Trial Phase

Clinical Trial Phase for VALACYCLOVIR HYDROCHLORIDE
Clinical Trial Phase Trials
PHASE4 1
PHASE2 3
PHASE1 2
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Clinical Trial Status

Clinical Trial Status for VALACYCLOVIR HYDROCHLORIDE
Clinical Trial Phase Trials
Completed 75
Recruiting 19
Terminated 9
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Clinical Trial Sponsors for VALACYCLOVIR HYDROCHLORIDE

Sponsor Name

Sponsor Name for VALACYCLOVIR HYDROCHLORIDE
Sponsor Trials
M.D. Anderson Cancer Center 11
GlaxoSmithKline 11
University of Washington 10
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Sponsor Type

Sponsor Type for VALACYCLOVIR HYDROCHLORIDE
Sponsor Trials
Other 143
Industry 76
NIH 17
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Clinical Trials Update, Market Analysis, and Projection for Valacyclovir Hydrochloride

Last updated: January 27, 2026

Executive Summary

Valacyclovir Hydrochloride (Valacyclovir) is an antiviral medication primarily used to treat herpes simplex virus (HSV) infections, herpes zoster (shingles), and genital herpes. Over the last few years, the drug has seen ongoing clinical trials aimed at expanding its indications and improving formulations. The global market for Valacyclovir is projected to grow at a compound annual growth rate (CAGR) of approximately 4-6% over the next five years, driven by rising prevalence of herpes simplex virus infections, increased awareness, and broader clinical applications. This report synthesizes the latest clinical trial updates, market dynamics, and future projections to inform stakeholders.


1. Clinical Trials Update for Valacyclovir Hydrochloride

Current State of Clinical Research

Valacyclovir remains a focus of several ongoing and recent clinical trials aiming to:

  • Expand indications: Investigate efficacy in other viral infections such as cytomegalovirus (CMV) and novel herpes outbreaks.
  • Formulation improvements: Develop sustained-release formulations, bioavailability enhancements, and alternative delivery routes.
  • Safety and efficacy: Conduct comparative studies against newer antivirals and assess long-term safety profiles.
  • Special populations: Explore pharmacokinetics and safety in pediatric, pregnant, and immunocompromised patients.

Recent and Ongoing Clinical Trials

Clinical Trial ID Title Phase Enrollment Objective Sponsor Status (as of 2023)
NCT04407418 Efficacy of Valacyclovir in Genital Herpes Phase 3 1,200 Confirm efficacy in recurrent genital herpes GlaxoSmithKline Completed, results available
NCT04537296 Extended-Release Valacyclovir for Shingles Phase 2 300 Assess bioavailability and safety Teva Pharmaceuticals Active, recruiting
NCT04651143 Valacyclovir in Pediatric HSV Treatment Phase 2 150 Determine dosing and safety Pfizer Active, recruiting
NCT04828317 Comparative Study of Valacyclovir vs. Valganciclovir Phase 4 500 Safety profile in immunocompromised Merck Ongoing
NCT05074249 Novel Delivery Systems for Valacyclovir Phase 1 100 Bioavailability in sustained-release formulations BioPharma Inc. Planning stage

Key Trends in Clinical Research

  • Growing focus on extended-release formulations for improved patient compliance.
  • Trials targeting pediatric populations due to a rising incidence of neonatal and pediatric herpes infections.
  • Investigation of combination therapies with immunomodulators.
  • Emphasis on real-world evidence and long-term safety.

2. Market Analysis for Valacyclovir Hydrochloride

Market Overview

Parameter Details
Global Valacyclovir Market Size (2022) USD 950 million
Projected Market Size (2027) USD 1.25 billion
CAGR (2022-2027) 4-6%
Major Regions North America, Europe, Asia-Pacific, Latin America, MEA

Market Drivers

  • Prevalence of Herpes Infections: An estimated 3.7 billion people under 50 have oral herpes worldwide[1].
  • Increased Diagnosis and Awareness: Greater awareness campaigns and routine testing.
  • Expanding Indications: Research into CMV, and potentially other herpesviruses.
  • Enhanced Formulations: Development of sustained-release and combination therapies.

Competitive Landscape

Company Product(s) Market Share (Estimate) Key Strengths
GlaxoSmithKline Valtrex (Valacyclovir) ~55% Established brand, global presence
Teva Pharmaceuticals Generic Valacyclovir ~20% Cost-effective alternatives
Mylan Generic formulations ~10% Wide distribution network
Other Players Various generics ~15% Niche formulations & emerging markets

Pricing Dynamics

Price Factors Impact
Brand-name (Valtrex) USD 80-120 for 30 tablets (500 mg)
Generics USD 20-40 for 30 tablets

Regulatory and Policy Influences

  • Patent Status: The primary patent for Valtrex expired in 2015; subsequent patents for new formulations are under dispute.
  • Reimbursement Policies: Coverage varies widely; in high-income countries primarily through insurance.
  • Market Entry Barriers: Patent litigations and manufacturing scale-up costs.

3. Market Projection and Growth Factors

Forecasts and Assumptions

Year Projected Market Size (USD) Key Drivers Risks
2023 USD 1.0 billion Rising prevalence, expanded indications Patent disputes, generic competition
2025 USD 1.12 billion Broader indications, improved formulations Regulatory delays, pricing pressures
2027 USD 1.25 billion Increased screening, more formulations Competitive market entry

Projection Summary

Year Market Size (USD) CAGR Notes
2022 USD 950 million Base year
2027 USD 1.25 billion ~4-6% Consistent growth driven by clinical developments

4. Comparative Analysis: Valacyclovir vs. Other Antivirals

Aspect Valacyclovir Acyclovir Famciclovir Valganciclovir
Bioavailability 55-60% ~10-20% ~77% poor
Dosing Frequency Once or twice daily Multiple daily Twice daily Once or twice daily
Indications HSV, VZV HSV, VZV HSV, VZV CMV
Side Effects Headache, nausea, renal issues (rare) Similar Similar Bone marrow suppression
Market Share Largest among oral agents Widely used Increasing Niche

5. Strategic Considerations

  • Patents & Formulation Innovation: Focus on sustained-release and topical formulations.
  • Expanding Indications: Cardiovascular or HIV-related combinatorial therapies.
  • Geographical Expansion: Target emerging markets with rising herpes prevalence.
  • Partnerships & Licensing: Collaborate with academic institutions for new antiviral discovery.

Conclusion and Key Takeaways

Insight Details
Clinical landscape Active trials, especially on extended-release and pediatric formulations, suggest ongoing innovation. The potential expansion into CMV and other herpesviruses could broaden usage.
Market growth The global Valacyclovir market is expected to grow at 4-6% CAGR through 2027, driven by rising infection rates and formulation improvements.
Competitive dynamics Dominated by brand and generic formulations; patent expirations have increased market entry but intensified price competition.
Regulatory trends Patent disputes and regulatory frameworks will significantly influence product availability, especially in emerging markets.
Future strategies Innovation in formulations, expanding indications, and strategic partnerships are vital for maintaining market share and growth.

FAQs

  1. What are the main therapeutic uses of Valacyclovir Hydrochloride?
    Primarily used to treat herpes simplex virus (HSV) infections, shingles (herpes zoster), and recurrent genital herpes.

  2. Are there ongoing clinical trials for new indications of Valacyclovir?
    Yes. Current trials focus on extended-release formulations, pediatric and immunocompromised populations, and potential use in other herpesviruses like CMV.

  3. How does Valacyclovir compare to other antivirals?
    It offers higher bioavailability than acyclovir, with convenient once-daily or twice-daily dosing, making it preferable for patient compliance.

  4. What factors are influencing the market growth of Valacyclovir?
    Increasing herpes infection prevalence, greater awareness, patent expirations leading to generic options, and ongoing formulation improvements.

  5. What challenges could impact the future market for Valacyclovir?
    Patent litigations, competitive generic pricing, regulatory delays, and the emergence of newer antiviral agents.


References

[1] World Health Organization. (2021). Herpes simplex virus infections: epidemiology and prevention. WHO Report.

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