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Antiviral

Acyclovir for Herpes

Phase 3
Waitlist Available
Research Sponsored by National Institute of Allergy and Infectious Diseases (NIAID)
Eligibility Criteria Checklist
Specific guidelines that determine who can or cannot participate in a clinical trial
Must have
Be younger than 18 years old
Timeline
Screening 3 weeks
Treatment Varies
Follow Up post randomization - 12 months
Awards & highlights
Pivotal Trial
All Individual Drugs Already Approved

Summary

The purpose of this study is to test whether long term treatment with acyclovir given orally (by mouth) improves the outcome for infants with herpes simplex virus infection of the brain or spinal cord (known as the central nervous system \[CNS\]). Infants with herpes viral infection of the CNS that has or has not spread to other parts of the body will be enrolled in this study. All participants will receive treatment in a hospital for 21 days with acyclovir, given intravenously (by a needle inserted into a vein). Participants will then be divided into two groups: those with CNS disease that has or has not spread to the skin, and those whose viral infection has spread and involves the CNS. Both groups will be randomly assigned to receive either oral acyclovir or placebo (inactive substance) for 6 months. Infants in the US and Canada will participate for 5 years. A physical exam, hearing exam, eye exam, and an evaluation of the nervous system will be performed throughout the study.

Eligible Conditions
  • Herpes
  • Herpes Simplex Virus Infection

Timeline

Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~post randomization - 12 months
This trial's timeline: 3 weeks for screening, Varies for treatment, and post randomization - 12 months for reporting.

Treatment Details

Study Objectives

Study objectives can provide a clearer picture of what you can expect from a treatment.
Primary study objectives
Participants With Neurologic Impairment at 12 Months as Measured by Bayley's Neuro-developmental Assessment.(Mental Scores)
Participants With Neurologic Impairment at 12 Months as Measured by a Bayley's Neuro-developmental Assessment (Motor Scores).
Secondary study objectives
Detection of Herpes Simplex Virus (HSV) DNA in the Cerebrospinal Fluid (CSF) by PCR at Anytime During the Initial 12 Months of Life.
Number of Participants With Two or Fewer Episodes of Cutaneous Recurrence of Herpes Simplex Virus (HSV) Disease Post-randomization During the Initial 12 Months of Life.

Side effects data

From 2008 Phase 3 trial • 46 Patients • NCT00031460
46%
Neutropenia
29%
Otitis media
29%
Upper respiratory infection
25%
Herpes simplex virus
8%
Gastroesophageal reflux
4%
Hydrocephalus
4%
Feeding dysfunction
4%
Bradycardia
4%
Seizures
4%
Gastroenteritis
4%
Rotavirus
4%
Decreased neutrophils
4%
Dehydration
4%
Apnea
4%
Tuberculosis
4%
Pneumonia
100%
80%
60%
40%
20%
0%
Study treatment Arm
Acyclovir
Placebo

Awards & Highlights

Pivotal Trial
The final step before approval, pivotal trials feature drugs that have already shown basic safety & efficacy.
All Individual Drugs Already Approved
Therapies where all constituent drugs have already been approved are likely to have better-understood side effect profiles.

Trial Design

2Treatment groups
Experimental Treatment
Placebo Group
Group I: AcyclovirExperimental Treatment1 Intervention
Group II: PlaceboPlacebo Group1 Intervention
Treatment
First Studied
Drug Approval Stage
How many patients have taken this drug
Acyclovir
FDA approved

Find a Location

Who is running the clinical trial?

National Institute of Allergy and Infectious Diseases (NIAID)Lead Sponsor
3,320 Previous Clinical Trials
5,364,599 Total Patients Enrolled
~2 spots leftby Nov 2025