A Pharmacokinetic Study of Valacyclovir in Pediatric Oncology Patients

Study Overview
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Brief Summary
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The purpose of this research is to study the pharmacology (how the body handles this drug) of valacyclovir in children receiving treatment for cancer. This study will last approximately 7 days.

Detailed Description
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In this study, patients will receive a single dose of oral valacyclovir. Blood samples will be drawn to evaluate the pharmacology (how the body handles the drug). Blood samples (less than one teaspoon each) will be obtained before receiving the drug and at 0.5, 1, 1.5, 2, 5, 6, and 8 hours after receiving the drug. The total amount of blood drawn from patients for all blood work including routine blood tests as well as pharmacokinetics will not be greater than 5% of the total blood volume. We will also have all urine output collected for 8 hours starting at the time patients receive the dose of valacyclovir. A 5cc sample of urine will be collected and analyzed to determine how the body handles the drug at hours 2, 4, 6, and 8.

Official Title
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A Pharmacokinetic Study of Valacyclovir in Pediatric Oncology Patients

Conditions
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Neoplasms

Intervention / Treatment
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* Drug: Valacyclovir


Participation Criteria
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Eligibility Criteria
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Inclusion criteria: Age: Patients must be > / = 2 and < / = 18 years old. Life Expectancy: Patients must have a life expectancy of > 8 weeks Subjects must have a diagnosed malignancy, and must currently be receiving consolidation or maintenance chemotherapy Hepatic/Renal Function: Patients must have adequate hepatic function (bilirubin < / = 1.5 mg/dl: SGPT < 3x normal) and adequate renal function (creatinine < / = 1 mg/dl: BUN < 20 ) Medication Tolerance: Patients must be able to swallow pills or tolerate a suspension of the medication Fluid Tolerance: Children must be able to retain liquids at the time of enrollment Informed Consent: Written informed consent will be obtained from all patients and/or their parents prior to enrollment Pregnancy: Women of childbearing age must have a negative serum pregnancy test at the time of study entry Exclusion criteria: More than one prior chemotherapy regimen. Patients with uncontrolled infections. Subjects with known history of adverse reaction to acyclovir in the past. Patients with concurrent infections requiring treatment with valacyclovir or acyclovir.

Ages Eligible for Study
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Minimum Age: 2 Years
Maximum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Intervention/Treatment |
| --- |
|Drug: Valacyclovir|nan|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Cancer