Valacyclovir clinical trials
Valacyclovir is named as an intervention in 7 current clinical trials in our USA, Mexico, France, Brazil and Taiwan registers. 4 are recruiting patients now. The most common phase is Phase 3. The sponsor with the most trials is Candel Therapeutics, Inc (4). The most-studied condition is Prostate Cancer.
Where Valacyclovir is approved
All regulators →Of the three regulators tracked here, the first to approve Valacyclovir was the US, on 23 Jun 1995. It is approved in 2 of the 3 regulators tracked here.
From the regulators' own registers: FDA Drugs@FDA, the EMA medicines list and Health Canada's Notice of Compliance database. Dates are the first listed approval of a product containing only this substance; combination products and nationally authorised EU medicines are not counted.
What health systems spend on Valacyclovir
All medicines →From NHSBSA Prescription Cost Analysis (Open Government Licence v3.0) and CMS State Drug Utilization Data. Both are gross amounts: neither system publishes its discounts or rebates per drug. Products combining several substances are not counted here.
How Valacyclovir works
All drug targets →- Human herpesvirus 1 DNA polymerase inhibitor InhibitorChEMBL only
- HIV infectious diseasePhase 3
- Herpes simplex encephalitisPhase 3
- PeriodontitisPhase 3
- Prostate cancerPhase 3
- Alzheimer diseasePhase 2
- COVID-19Phase 2
- Cognitive impairmentPhase 2
- Anaplastic astrocytomaPhase 2
- Bipolar disorderPhase 2
- Breast cancerPhase 2
Mechanisms and diseases from ChEMBL via the Open Targets Platform (release 26.09), ChEMBL record CHEMBL1349, CC BY-SA 3.0. Targets checked against the IUPHAR/BPS Guide to PHARMACOLOGY (2026.3.1), ligand 4824, CC BY-SA 4.0. Trial phases are not approvals: approved uses are shown from the regulators' own records where we hold them.
Patient leaflets for Valacyclovir
The package leaflet is the official guide for patients that comes with every medicine. These links go to the regulators that publish it.
- UKUnited Kingdom: Search MHRA ProductsPatient information leaflets and SmPCs for UK-licensed products.
- USUnited States: Search DailyMedFDA-approved labels, including patient and medication guides.
Leaflets differ between brands and countries; always read the one that comes with your own medicine. This is regulatory information, not medical advice.
Reference identifiers for Valacyclovir
- ATC code
- J05AB11
- ChEMBL
- CHEMBL1349
- DrugBank
- DB00577
- PubChem CID
- 135398742
- CAS number
- 124832-26-4
- FDA UNII
- MZ1IW7Q79D
- Wikidata
- Q418594
- Wikipedia
- Valaciclovir
Codes that identify this medicine in other databases, from Wikidata (CC0), matched by its ChEMBL ID. The ATC code is the WHO classification of what the medicine is used for.
Trials by status
Trials by phase
Clinical trials of Valacyclovir
7 trialsRegisters list studies that are recruiting, about to open, active but closed to enrolment, or enrolling by invitation. The UK and USA registers cover industry-sponsored studies only. Trial titles and statuses are copied from the registry as published.
Conditions studied with Valacyclovir
12 conditionsSponsors
lead sponsor per trial| Lead sponsor | Trials |
|---|---|
| Candel Therapeutics, Inc | 4 |
| Assistance Publique - Hôpitaux de Paris | 1 |
| Instituto Oncoclinicas | 1 |
| National Taiwan University Hospital | 1 |
By country register
| Register | Trials | Recruiting |
|---|---|---|
| Clinical trials in USA | 4 | 2 |
| Clinical trials in Mexico | 2 | 0 |
| Clinical trials in France | 1 | 1 |
| Clinical trials in Brazil | 1 | 0 |
| Clinical trials in Taiwan | 1 | 1 |
A trial with sites in more than one country appears in each of those registers.
Related compounds
Questions about Valacyclovir trials
How many clinical trials are testing Valacyclovir?
7 current trials in our USA, Mexico, France, Brazil and Taiwan registers name Valacyclovir as a drug or biological intervention, as of the registry sync on 9 November 2026. Completed and withdrawn studies are not counted.
Are Valacyclovir trials recruiting patients?
Yes. 4 of the 7 trials are recruiting: 2 with sites in USA, 1 with sites in France and 1 with sites in Taiwan. Eligibility and site contacts are on each trial's record. Only the study team can confirm whether a patient is eligible.
Who sponsors Valacyclovir clinical trials?
Candel Therapeutics, Inc (4), Assistance Publique - Hôpitaux de Paris (1), Instituto Oncoclinicas (1) and National Taiwan University Hospital (1). The number in brackets is how many trials each organisation leads.
Where does this information come from?
Every trial, status, phase and sponsor on this page is copied from public ClinicalTrials.gov records by a daily sync. Nothing here describes how Valacyclovir works or whether it is effective, and it is not medical advice.
How this page is built
Everything on this page is copied from public ClinicalTrials.gov registry records — it is not written from memory, and nothing here describes how Valacyclovir works or whether it is effective. Each trial links to its own record so you can check it yourself.
- ClinicalTrials.gov (U.S. National Library of Medicine) ↗ Trial IDs, titles, intervention names and synonyms, phase, overall status, lead sponsor and conditions for every trial on this page
This page is built automatically: a daily sync job reads the registry records behind our country trial registers, collects every trial that lists Valacyclovir (or a registered synonym) as a drug or biological intervention, and tabulates the registry fields directly. Placebos and generic comparators are excluded. There is no AI drafting and no per-compound editorial pass, and the page has not been clinically reviewed. The “last verified” date above is the timestamp of that sync, not a review date. Our general editorial approach is described in our editorial standards and corrections policy. The ClinicalTrials.gov data on this page was last retrieved on 9 Nov 2026. How every register is built: methodology · fixes we have made: corrections log.