Pharmacokinetics of Oseltamivir in Newborns and Infants

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

19 participants

Study Classification

OBSERVATIONAL

Study Start Date

2011-01-31

Study Completion Date

2011-01-31

Brief Summary

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Oseltamivir dosing in infants \< 3 months of age is based on a single pharmacokinetic study in 20 infants from a single center. This dataset is limited by a lack of robustness, because only 1 sample was collected from each participant. The investigators obtained two blood samples each from infants receiving oseltamivir after obtaining informed consent from the infant's parents. The investigators propose to analyze the blood samples to determine the amount of oseltamivir in the infant's blood. Measurement of these values will increase the understanding of the absorption and elimination of oseltamivir in preterm and term infants, and improve our ability to provide the correct doses to this high risk population.

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Detailed Description

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Conditions

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Prematurity of Fetus

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Study Groups

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Oseltamivir exposure

One infant in the Neonatal Intensive Care Unit (NICU) at St. Louis Children's Hospital experienced respiratory decompensation and tested positive for influenza virus type A by fluorescent antibody stain performed on a nasopharyngeal swab. This infant received treatment doses of oseltamivir. Subsequently, 27 other infants received oseltamivir prophylaxis for exposure to influenza virus type A. Exposed infants were those who shared a primary medical team, nursing care, respiratory therapist, physical therapist, or occupational therapist with the influenza A positive infant. Prophylaxis was deemed necessary by the attending neonatologist after consultation with the Infectious Diseases Division of the Department of Pediatrics at the Washington University School of Medicine.

Oseltamivir

Intervention Type DRUG

Treatment dose was oseltamivir 3 mg/kg/dose by mouth (PO) twice daily. Prophylactic dose was oseltamivir 1 mg/kg/dose PO once daily to infants \< 28 weeks postmenstrual age (PMA), 1 mg/kg/dose PO twice daily to infants 28 - 38 weeks PMA, and 3 mg/kg/dose PO once daily to infants \> 38 weeks PMA. Dosing in infants \< 28 weeks PMA was chosen based on unpublished data from Acosta et al. This data was obtained from phone contact with Dr. Peter Gal, co-author of the study. Dosing in infants 28 - 38 weeks PMA was chosen based on published data from Acosta et al.1 Dosing in infants \> 38 weeks PMA and less than 3 months postnatal age was chosen based on data from Kimberlin et al. Dosing in infants \> 38 weeks PMA and greater than 3 months postnatal age was per the recommendations of the Advisory Committee on Immunization Practices of the United States Department of Health and Human Services.

Interventions

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Oseltamivir

Treatment dose was oseltamivir 3 mg/kg/dose by mouth (PO) twice daily. Prophylactic dose was oseltamivir 1 mg/kg/dose PO once daily to infants \< 28 weeks postmenstrual age (PMA), 1 mg/kg/dose PO twice daily to infants 28 - 38 weeks PMA, and 3 mg/kg/dose PO once daily to infants \> 38 weeks PMA. Dosing in infants \< 28 weeks PMA was chosen based on unpublished data from Acosta et al. This data was obtained from phone contact with Dr. Peter Gal, co-author of the study. Dosing in infants 28 - 38 weeks PMA was chosen based on published data from Acosta et al.1 Dosing in infants \> 38 weeks PMA and less than 3 months postnatal age was chosen based on data from Kimberlin et al. Dosing in infants \> 38 weeks PMA and greater than 3 months postnatal age was per the recommendations of the Advisory Committee on Immunization Practices of the United States Department of Health and Human Services.

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* All neonates and infants in the NICU at St. Louis Children's Hospital who received oseltamivir for treatment of or exposure to influenza virus type A were considered eligible for this study.

Maximum Eligible Age

6 Months

Eligible Sex

ALL

Accepts Healthy Volunteers

No