The purpose of this study is to learn more about the safety and dosing of sildenafil in infants.
Pharmacokinetics and safety of sildenafil will be studied in preterm infants who are receiving sildenafil per standard of care or 1 dose prescribed for the study.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
NONE
Enrollment
34
A single IV dose of sildenafil will be administered over 90 minutes with no greater than a 15-minute flush. Final dose to be determined based on at least the first 4 participants enrolled in Cohort 1; final dose expected to be a single dose between 0.25 and 0.5 mg/kg.
University of Alabama at Birmingham
Birmingham, Alabama, United States
Riley Hospital
Indianapolis, Indiana, United States
Kosair Pediatric Research Unit
Louisville, Kentucky, United States
Area under the plasma concentration versus time curve 0-24 hours for sildenafil
Time frame: IV study dose 0-15 min,1-2,3-4,12-14,24-30,48-56hr after flush.Clinical care: IV <0.5hr before dose <15 min & 3-4hr after flush <0.5hr before next dose. Enteral <0.5hr before dose, 1-2 & 3-4hr after dose, <0.5hr before next dose. 22-26hr after last dose
Peak plasma concentration of sildenafil
Time frame: IV study dose 0-15 min,1-2,3-4,12-14,24-30,48-56hr after flush.Clinical care: IV <0.5hr before dose <15 min & 3-4hr after flush <0.5hr before next dose. Enteral <0.5hr before dose, 1-2 & 3-4hr after dose, <0.5hr before next dose. 22-26hr after last dose
Clearance of sildenafil
Time frame: IV study dose 0-15 min,1-2,3-4,12-14,24-30,48-56hr after flush.Clinical care: IV <0.5hr before dose <15 min & 3-4hr after flush <0.5hr before next dose. Enteral <0.5hr before dose, 1-2 & 3-4hr after dose, <0.5hr before next dose. 22-26hr after last dose
Volume of distribution at steady state
Time frame: IV study dose 0-15 min,1-2,3-4,12-14,24-30,48-56hr after flush.Clinical care: IV <0.5hr before dose <15 min & 3-4hr after flush <0.5hr before next dose. Enteral <0.5hr before dose, 1-2 & 3-4hr after dose, <0.5hr before next dose. 22-26hr after last dose
Half life of sildenafil
Time frame: IV study dose 0-15 min,1-2,3-4,12-14,24-30,48-56hr after flush.Clinical care: IV <0.5hr before dose <15 min & 3-4hr after flush <0.5hr before next dose. Enteral <0.5hr before dose, 1-2 & 3-4hr after dose, <0.5hr before next dose. 22-26hr after last dose
Number of subjects with adverse events as a measure of safety and tolerability.
Time frame: From the time of the first dose to 3 days after the last dose; serious adverse events will be collected from the first dose of sildenafil to 7 days after the last dose of sildenafil
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Albany Medical Center
Albany, New York, United States
Kings County Hospital Center/SUNY Downstate Medical Center
Brooklyn, New York, United States
University of North Carolina
Chapel Hill, North Carolina, United States
Duke University
Durham, North Carolina, United States
Cincinnati Children's Hospital Medical Center
Cincinnati, Ohio, United States
Medical University of South Carolina
Charleston, South Carolina, United States
Correlation between serum and dried blood spot samples
Time frame: 1-7 days
Evaluate P450 single nucleotide polymorphisms (SNPs)
Time frame: 2-7 days