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Showing 1–24 of 84 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Valacyclovir hydrochloride Clear all
Completed Not applicable Interventional

A Comparative Trial of Valacyclovir Hydrochloride ( 256U87 ) and Acyclovir for the Suppression of Anogenital Herpes Infections in HIV-Infected Patients

NCT00002084
View directory record Official record
Conditions
Herpes Simplex, HIV Infections
Interventions
Valacyclovir hydrochloride, Acyclovir
Drug
Lead sponsor
Glaxo Wellcome
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
46
States / cities
Mobile, Alabama • Tucson, Arizona • Los Angeles, California + 29 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of Valacyclovir in the Reduction of HSV-2 Recurrence and Shedding

NCT00803543
View directory record Official record
Conditions
HIV, HIV Infections
Interventions
Valacyclovir, Placebo
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years and older
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2014
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jul 12, 2017 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Phase 4 Interventional Results available

A Study Comparing Daily Treatment With Valaciclovir To Placebo For Suppression Of Herpes Simplex Virus HSV-2 Genital Herpes In Newly Diagnosed Patients. VALTREX® Tablet is a Trademark of the GlaxoSmithKline Group of Companies.

NCT00158860
View directory record Official record
Conditions
Herpes Genitalis
Interventions
Valaciclovir, Placebo
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
384 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
58
States / cities
Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 50 more
Source: ClinicalTrials.gov public record
Updated Feb 14, 2019 · Synced Sep 3, 2026, 6:55 PM EDT
Recruiting Phase 1Phase 2 Interventional

HSV-tk + Valacyclovir + SBRT + Chemotherapy for Recurrent GBM

NCT03596086
View directory record Official record
Conditions
Glioblastoma Multiforme, Astrocytoma, Grade III
Interventions
ADV/HSV-tk (gene therapy)
Drug
Lead sponsor
David Baskin MD
Other
Eligibility
18 Years and older
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 29, 2026 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Phase 4 Interventional Results available

Randomized Trial to Evaluate Suppressive Effect of High-Dose Valacyclovir Versus Once-Daily Valacyclovir on Persons With HSV-2

NCT01346475
View directory record Official record
Conditions
Genital Herpes
Interventions
Valacyclovir
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Mar 8, 2017 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Phase 4 Interventional Results available

Trial to Study the Effect of Dose of Herpes Simplex Virus-2 (HSV-2) Suppressive Therapy on HSV and HIV

NCT00527618
View directory record Official record
Conditions
Genital Herpes, HIV Infection
Interventions
valacyclovir, acyclovir
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 6, 2018 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Phase 4 Interventional

A Study of Valacyclovir to Suppress HSV and HIV Shedding in Coinfected Persons

NCT00161434
View directory record Official record
Conditions
Herpes Simplex, HIV Infections
Interventions
valacyclovir, placebo
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older · Male only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 9, 2008 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Phase 2 Interventional

A Study With ASP2151 in Subjects With Recurrent Episodes of Genital Herpes

NCT00486200
View directory record Official record
Conditions
Herpes Genitalis
Interventions
ASP2151, valacyclovir, Placebo
Drug
Lead sponsor
Astellas Pharma Inc
Industry
Eligibility
18 Years and older
Enrollment
695 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
25
States / cities
Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 21 more
Source: ClinicalTrials.gov public record
Updated Dec 6, 2017 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Phase 1 Interventional

Intrapleural AdV-tk Therapy in Patients With Malignant Pleural Effusion

NCT01997190
View directory record Official record
Conditions
Malignant Pleural Effusion, Lung Cancer, Mesothelioma, Breast Cancer, Ovarian Cancer
Interventions
AdV-tk + valacyclovir
Biological
Lead sponsor
Candel Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 24, 2023 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Not applicable Interventional

Randomized Study of Two Doses of Oral Valacyclovir in Immunocompromised Patients With Uncomplicated Herpes Zoster

NCT00006131
View directory record Official record
Conditions
Herpes Zoster, Immunologic Deficiency Syndromes
Interventions
Valacyclovir
Drug
Lead sponsor
National Center for Research Resources (NCRR)
NIH
Eligibility
18 Years and older
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1997
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 23, 2007 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Not applicable Interventional

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

NCT00002000
View directory record Official record
Conditions
Herpes Simplex, HIV Infections
Interventions
Valacyclovir hydrochloride, Acyclovir
Drug
Lead sponsor
Glaxo Wellcome
Industry
Eligibility
13 Years and older
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
22
States / cities
Mobile, Alabama • San Francisco, California • Denver, Colorado + 17 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 3, 2026, 6:55 PM EDT
Recruiting Phase 2 Interventional

Time-limited Triplet Combination of Pirtobrutinib, Venetoclax, and Obinutuzumab for Patients With Treatment-naïve Chronic Lymphocytic Leukemia (CLL) or Richter Transformation (RT)

NCT05536349
View directory record Official record
Conditions
Leukemia
Interventions
Pirtobrutinib, Obinutuzumab, Venetoclax, Valacyclovir, Allopurinol
Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 29, 2026 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Valacyclovir+Temovate Gel for the Treatment of Herpes Labialis

NCT00297011
View directory record Official record
Conditions
Herpes Labialis
Interventions
valacyclovir+clobetasol gel
Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2008
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 5, 2008 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

VALTREX Once Daily For Viral Shedding In Herpes Simplex Virus 2 (HSV-2) Seropositive Subjects. VALTREX® Tablet is a Trademark of GlaxoSmithKline Group of Companies.

NCT00116844
View directory record Official record
Conditions
Infections, Herpesviridae
Interventions
Valaciclovir, Placebo
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
73 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
17
States / cities
Carmichael, California • Davis, California • Riverside, California + 13 more
Source: ClinicalTrials.gov public record
Updated Feb 11, 2018 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Phase 1 Interventional

A Phase I Study of AdV-tk + Prodrug Therapy in Combination With Radiation Therapy for Pediatric Brain Tumors

NCT00634231
View directory record Official record
Conditions
Malignant Glioma, Recurrent Ependymoma
Interventions
AdV-tk, valacyclovir, Radiation
Biological · Drug · Radiation
Lead sponsor
Candel Therapeutics, Inc.
Industry
Eligibility
3 Years to 21 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2021
U.S. locations
2
States / cities
Chicago, Illinois • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 24, 2023 · Synced Sep 3, 2026, 6:55 PM EDT
Withdrawn Phase 4 Interventional

Topical Corticosteroid Use in Addition to Oral Antivirals for Prevention of Recurrence of Herpes Simplex Virus (HSV) Keratitis

NCT03626376
View directory record Official record
Conditions
Herpes Simplex Virus Keratitis
Interventions
oral acyclovir 400 mg BID OR valacyclovir 500 mg qdaily, oral acyclovir 400 mg BID OR valacyclovir 500 mg qdaily + topical corticosteroid eye drops
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 100 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 13, 2022 · Synced Sep 3, 2026, 6:55 PM EDT
Terminated Phase 2 Interventional Results available

Trial of Radiation and Gene Therapy Before Nivolumab for Metastatic Non-Small Cell Lung Carcinoma and Uveal Melanoma

NCT02831933
View directory record Official record
Conditions
Lung Squamous Cell Carcinoma Stage IV, Nonsquamous Nonsmall Cell Neoplasm of Lung, Metastatic Uveal Melanoma
Interventions
ADV/HSV-tk, Valacyclovir, SBRT, nivolumab
Biological · Drug · Radiation
Lead sponsor
Eric Bernicker, MD
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 20, 2023 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Phase 4 Interventional Results available

Zoster Eye Disease Study

NCT03134196
View directory record Official record
Conditions
Herpes Zoster Ophthalmicus
Interventions
Masked Placebo, Masked Oral Valacyclovir
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years and older
Enrollment
527 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2024
U.S. locations
71
States / cities
Birmingham, Alabama • Scottsdale, Arizona • Little Rock, Arkansas + 58 more
Source: ClinicalTrials.gov public record
Updated Mar 6, 2025 · Synced Sep 3, 2026, 6:55 PM EDT
Recruiting Phase 2 Interventional

A Biomarker Study in Men With Localized Prostate Cancer Treated With Aglatimagene Besadenovec

NCT07332000
View directory record Official record
Conditions
Prostate Cancer Patients Treated by Radiotherapy, Prostate Cancer (Adenocarcinoma)
Interventions
aglatimagene besadenovec + valacyclovir, External Beam Radiation Therapy (EBRT)
Biological · Radiation
Lead sponsor
Candel Therapeutics, Inc.
Industry
Eligibility
18 Years and older · Male only
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
7
States / cities
Peoria, Arizona • Lakewood, Colorado • Littleton, Colorado + 4 more
Source: ClinicalTrials.gov public record
Updated Mar 19, 2026 · Synced Sep 3, 2026, 6:55 PM EDT
Not yet recruiting Phase 2 Interventional

SARS-CoV-2 and Herpesvirus Inhibition for Ending Long COVID Dysfunction

NCT07597902
View directory record Official record
Conditions
Post-acute Sequelae of COVID-19, Long COVID
Interventions
Valacyclovir, Celecoxib, Paxlovid, Placebo
Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years to 65 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 18, 2026 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Phase 1 Interventional

A Safety And Tolerability Study Of Valaciclovir Oral Suspension In Infants And Children

NCT00297206
View directory record Official record
Conditions
Herpes Simplex
Interventions
Valaciclovir
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
1 Month to 6 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2007
U.S. locations
10
States / cities
Birmingham, Alabama • Little Rock, Arkansas • San Diego, California + 7 more
Source: ClinicalTrials.gov public record
Updated Sep 10, 2017 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Phase 3 Interventional

Valaciclovir to Prevent Transmission of Herpes Simplex Virus

NCT00001649
View directory record Official record
Conditions
Herpes Simplex
Interventions
Valaciclovir
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
Not listed
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1997 – 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 3, 2026, 6:55 PM EDT
Recruiting Phase 1Phase 2 Interventional

HSV-tk and XRT and Chemotherapy for Newly Diagnosed GBM

NCT03603405
View directory record Official record
Conditions
Glioblastoma, Anaplastic Astrocytoma
Interventions
ADV/HSV-tk (gene therapy)
Drug
Lead sponsor
The Methodist Hospital Research Institute
Other
Eligibility
18 Years and older
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 29, 2026 · Synced Sep 3, 2026, 6:55 PM EDT
Completed Phase 1 Interventional

AdV-tk Therapy With Surgery and Chemoradiation for Pancreas Cancer (PaTK01)

NCT00638612
View directory record Official record
Conditions
Pancreatic Adenocarcinoma, Pancreatic Cancer
Interventions
AdV-tk, Valacyclovir
Biological · Drug
Lead sponsor
Candel Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2015
U.S. locations
3
States / cities
Duarte, California • La Jolla, California • Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 24, 2023 · Synced Sep 3, 2026, 6:55 PM EDT