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Sildenafil IV Bolus Study

This study has been completed.
Information provided by:
Pfizer Identifier:
First received: November 19, 2008
Last updated: May 30, 2011
Last verified: May 2011

The objective of this study is to assess the safety, tolerability and pharmacokinetics of intravenous sildenafil (10 mg) administered as a bolus injection to patients with Pulmonary Arterial Hypertension already receiving and stable on oral Revatio 20 mg TID.

Condition Intervention Phase
Hypertension, Pulmonary [C08.381.423]
Drug: sildenafil
Phase 1

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Endpoint Classification: Safety Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: An Open Single Dose Study To Assess The Safety, Tolerability And Pharmacokinetics Of An Intravenous Bolus Dose (10 Mg) Of Sildenafil In Patients With Pulmonary Arterial Hypertension (PAH).

Resource links provided by NLM:

Further study details as provided by Pfizer:

Primary Outcome Measures:
  • Pharmacokinetic concentrations of plasma sildenafil and its metabolite [ Time Frame: 6 hours ] [ Designated as safety issue: No ]
  • Adverse events [ Time Frame: 28 days ] [ Designated as safety issue: Yes ]
  • Change in blood pressure and pulse rate from baseline (sitting and postural) [ Time Frame: 6 hours ] [ Designated as safety issue: Yes ]

Estimated Enrollment: 12
Study Start Date: October 2008
Study Completion Date: December 2008
Primary Completion Date: December 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: 10 mg sildenafil bolus
10 mg sildenafil bolus
Drug: sildenafil
10 mg sildenafil bolus


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Subjects (≥18 years old) receiving oral Revatio 20 mg TID for PAH within the approved indication (EU Summary of Product Characteristics) for a minimum of 1-month and who, in the investigator's opinion, have demonstrated good tolerability. Subjects with PAH who are nil by mouth for any reason (eg, elective surgery or medical procedure, TPN feeding, gastrointestinal disturbance etc) may also be included in the study provided they are haemodynamically stable (see Inclusion Criterion 4) and the 6 hour period of blood pressure and pulse monitoring in the study does not interfere with any planned medical or surgical intervention.
  • Evidence of a personally signed and dated informed consent document indicating that the subject has been informed of all pertinent aspects of the study.
  • Subjects who are willing and able to comply with scheduled visits, treatment plan and study tests and procedures.

Exclusion Criteria:

  • Any subject receiving Revatio outside ('off-label') of the current Summary of Product Characteristics (SmPC).
  • Other severe acute or chronic medical or psychiatric condition that may increase the risk associated with study participation or investigational product administration or may interfere with the interpretation of study results and, in the judgment of the investigator, would make the subject inappropriate for entry into this study.
  • Introduction of potent CYP 3A4 inhibitors (eg, ketoconazole, itraconazole and ritonavir) within the previous 1 month of screening.
  Contacts and Locations
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Please refer to this study by its identifier: NCT00800592

Pfizer Investigational Site
Bruxelles, Belgium, 1070
Sponsors and Collaborators
Study Director: Pfizer Call Center Pfizer
  More Information

Additional Information:
No publications provided by Pfizer

Additional publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Director, Clinical Trial Disclosure Group, Pfizer, Inc. Identifier: NCT00800592     History of Changes
Other Study ID Numbers: A1481262
Study First Received: November 19, 2008
Last Updated: May 30, 2011
Health Authority: Belgium: Federal Agency for Medicines and Health Products, FAMHP

Keywords provided by Pfizer:
Sildenafil, Revatio, PAH, IV, Bolus

Additional relevant MeSH terms:
Hypertension, Pulmonary
Cardiovascular Diseases
Lung Diseases
Respiratory Tract Diseases
Vascular Diseases
Cardiovascular Agents
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Pharmacologic Actions
Phosphodiesterase 5 Inhibitors
Phosphodiesterase Inhibitors
Therapeutic Uses
Urological Agents
Vasodilator Agents processed this record on November 20, 2014