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Study To Investigate Safety And Efficacy Of Sildenafil In The Newborns With Persistent Pulmonary Hypertension (PPHN)

This study has been terminated.
(See termination reason in detailed description.)
Information provided by (Responsible Party):
Pfizer Identifier:
First received: February 15, 2010
Last updated: November 1, 2012
Last verified: November 2012
Sildenafil is efficacious in newborns with persistent pulmonary hypertension and its use will reduce the need for inhaled nitric oxide.

Condition Intervention Phase
Persistent Pulmonary Hypertension of the Newborn
Hypoxic Respiratory Failure
Drug: sildanefil
Phase 2

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Single Arm Single Centre Study To Investigate Safety And Efficacy Of Sildenafil In Near Term And Term Newborns With Persistent Pulmonary Hypertension Of The Newborn (PPHN)

Resource links provided by NLM:

Further study details as provided by Pfizer:

Primary Outcome Measures:
  • Percentage of Participants Requiring Inhaled Nitric Oxide (iNO) or Extracorporeal Membrane Oxygenation (ECMO) [ Time Frame: From start of infusion (baseline) up to Day 14 ]
    Percentage of participants who required standard therapy (iNO or ECMO) after failure of study treatment.

  • Number of Participants With Adverse Events (AEs) Based on Severity [ Time Frame: Baseline up to 28 days after last dose ]
    AE:any untoward medical occurrence in participant who received study drug without regard to possibility of causal relationship. SAE:AE resulting in any of following outcomes or deemed significant for any other reason: death; initial/prolonged inpatient hospitalization; life-threatening experience; persistent/significant disability/incapacity; congenital anomaly. Severity criteria: "mild=does not interfere with participant's usual function; moderate=interferes to some extent with participant's usual function and severe=interferes significantly with participant's usual function".

  • Number of Participants With Abnormal Laboratory Data [ Time Frame: Screening, once daily for 3 days, every 48 hours thereafter till the end of infusion (up to Day 14) ]
    Criteria for potentially clinically significant (PCS) laboratory values: hematocrit 29.2 percent (%); white blood cell (WBC) count 5.0*10^3, lymphocyte absolute 0.88*10^3, total neutrophils absolute 12.07*10^3, eosinophils absolute 0.50*10^3 per cubic millimeter (/mm^3); calcium 6.8 milligram/deciliter (mg/dL); venous bicarbonate 47.0 milliequivalent/liter (meq/L).

Secondary Outcome Measures:
  • Change From Baseline in Oxygenation Index at Hour 6 and 12 [ Time Frame: Baseline, Hour 6, 12 ]
    Oxygenation Index (OI) was calculated as the product of fraction of inspired oxygen (FiO2) and Mean Airway Pressure divided by partial pressure of oxygen in arterial blood [(FiO2*Mean Airway Pressure)/PaO2] measured in centimeter of water/millimeter of mercury (cmH2O/mmHg). FiO2 is the measure of oxygen concentration that is breathed. Mean airway pressure is defined as an average of the airway pressure throughout the respiratory cycle. PaO2 is the measure of oxygen level in the arterial blood.

  • Change From Baseline in Differential Saturation (Pre- And Post-ductal) at Hour 6 and 12 [ Time Frame: Baseline, Hour 6, 12 ]
    Differential oxygenation saturation between preductal and postductal sites as measured by pulse oximetry. A difference of greater than (>) 5 percent (%) to 10% in saturation indicates right-to-left shunt through the ductus arteriosus. Oxygenation saturation is measured as percentage of hemoglobin binding sites occupied by oxygen in the blood.

  • Change From Baseline in Ratio of Partial Pressure of Oxygen in Arterial Blood to the Fraction of Inspired Oxygen (P/F) at Hour 6 and 12 [ Time Frame: Baseline, Hour 6, 12 ]
    The ratio of partial pressure of arterial oxygen and fraction of inspired oxygen is a comparison between the oxygen level in the arterial blood and the oxygen concentration that is breathed. It helps to determine the degree of any problems with how the lungs transfer oxygen to the blood.

  • Duration of Mechanical Ventilation [ Time Frame: Baseline up to 28 days after last dose ]
    The number of days from the start to the stop of mechanical ventilation, if multiple ventilations occurred during the follow-up, the sum of the duration of each ventilation was used for analyses. Mechanical ventilation was defined as use of mechanical assistance or replacement of spontaneous breathing.

  • Time to Receipt of Standard Therapy (Inhaled Nitric Oxide [iNO] or Extracorporeal Membrane Oxygenation [ECMO]) [ Time Frame: Baseline up to 28 days after last dose ]
    Time from start of treatment up to introduction of standard therapy. If participants did not receive standard therapy within 14 days after initiation of the study treatment, then Day 14 was the censoring time.

  • Population Pharmacokinetics of Sildenafil [ Time Frame: Pre-dose, 5 and 30 minutes post-loading infusion, within 48 to 72, 96 to 120 hours during infusion, within 4 to 8, 18 to 24 and 44 to 48 hours post-maintenance infusion ]
    Data for this Outcome Measure are not reported here because the analysis population includes participants who were not enrolled in this study. is designed for reporting results from only those participants who were enrolled in the study and described in the Participant Flow and Baseline Characteristics modules.

  • Maximum Observed Plasma Concentration (Cmax) of Sildenafil Metabolite (UK-103320) [ Time Frame: Pre-dose, 5 and 30 minutes post-loading infusion, within 48 to 72, 96 to 120 hours during infusion, within 4 to 8, 18 to 24 and 44 to 48 hours post-maintenance infusion ]

Other Outcome Measures:
  • Duration of Study Medication [ Time Frame: Baseline up to Day 14 ]
    The duration of the infusion was determined as per investigator's discretion up to Day 7 or Day 14.

Enrollment: 4
Study Start Date: December 2010
Study Completion Date: November 2011
Primary Completion Date: November 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: one Drug: sildanefil
Intravenous sildenafil citrate will be administered as a loading dose of 0.1 mg/kg given over 30 minutes. This will be followed by a maintenance treatment consisting of an intravenous infusion of 0.03 mg/kg/hr. The duration of the infusion will be determined by the need of the individual patient, but will be reviewed at Day 7 if still ongoing, and will not continue past Day 14.

Detailed Description:
Letter to investigator dated 18 June 2012 that study was to be terminated. Study terminated due to evolved and widespread use of standard of care, relevance of study questioned. No safety reasons or issues.

Ages Eligible for Study:   up to 72 Hours   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • 72 hours of age; and > or = to 34 weeks gestational age.
  • Persistent Pulmonary Hypertension of the Newborn or Hypoxic respiratory failure associated with:

    1. Idiopathic PPHN or
    2. Meconium aspiration syndrome or
    3. Sepsis or
    4. Pneumonia
  • Oxygenation Index (OI) >15 and <60 calculated

Exclusion Criteria:

  • Patients already receiving inhaled nitric oxide (iNO) on referral.
  • Prior or immediate need for full Cardio Pulmonary Resuscitation or Extracorporeal Membrane Oxygenation (ECMO).
  • Life threatening or lethal congenital anomaly.
  • Large left to right intracardiac or ductal shunting (diagnosed from echocardiogram on admission to GOSH).
  • Clinically significant active seizures as per clinical judgment.
  • Bleeding diathesis as per clinical judgment
  Contacts and Locations
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Please refer to this study by its identifier: NCT01069861

United Kingdom
Great Ormond Street Hospital, Paediatric Intensive Care
London, United Kingdom, WC1N 3JH
Sponsors and Collaborators
Study Director: Pfizer Call Center Pfizer
  More Information

Additional Information:
Responsible Party: Pfizer Identifier: NCT01069861     History of Changes
Other Study ID Numbers: A1481276
Study First Received: February 15, 2010
Results First Received: November 1, 2012
Last Updated: November 1, 2012

Keywords provided by Pfizer:
sildanefil IV

Additional relevant MeSH terms:
Respiratory Insufficiency
Hypertension, Pulmonary
Persistent Fetal Circulation Syndrome
Vascular Diseases
Cardiovascular Diseases
Respiration Disorders
Respiratory Tract Diseases
Lung Diseases
Infant, Newborn, Diseases
Sildenafil Citrate
Vasodilator Agents
Phosphodiesterase 5 Inhibitors
Phosphodiesterase Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Urological Agents processed this record on April 28, 2017