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Pulmonary HypertensionPhase 3NCT00454207

Open Label Study of Sildenafil in Patients With Pulmonary Arterial Hypertension

A Phase 3 study testing sildenafil citrate (UK-92,480) in people with Pulmonary Hypertension, run by Pfizer's Upjohn has merged with Mylan to form Viatris Inc. at 8 sites in Japan.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

To assess the safety of sildenafil 20 mg TID orally given to Japanese pulmonary arterial hypertension patients (Part 1 and 2) To assess the efficacy after 12 weeks of treatment of sildenafil 20 mg TID orally given to Japanese pulmonary arterial hypertension patients (Part 1) Read more about this study

Who is it for?
Ages 16 years and older
Conditions the study is for
Pulmonary Hypertension
What is being tested?
sildenafil citrate (UK-92,480)
Could I receive a placebo?
No, everyone receives an active treatment
How many people
44 participants
Where
8 sitesJapan
Study dates
Apr 2007to Feb 2009
Phase
Phase 3
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 16 years and older
  • All sexes
  • No healthy volunteers
  • Child, Adult, Older adult

Who may be able to join

  • Subjects aged 16 and over, and classified as having pulmonary arterial hypertension
  • Subjects who meet the following conditions on right heart catheterization at screening or baseline: mean pulmonary arterial pressure of ≥ 25mmHg and pulmonary capillary wedge pressure of ≤ 15mmHg at rest
  • Subjects whose baseline 6-Minute Walk test distance is >100 m and <450 m

Who cannot join

  • Significant Hepatic and/or renal disorder
  • Subjects with known hereditary degenerative retinal disorders (such as retinitis pigmentosa) or history of non-arteritic ischemic optic neuropathy (NAION)
  • Subjects who are currently receiving nitrates or nitric oxide donors in any form, ritonavir, ketoconazole and itraconazole

Trial locations and contacts

8 sites in 1 country.

8 sites in 1 country

Japan8 sites
  • Pfizer Investigational Site

    Bunkyo-ku, Tokyo

  • Pfizer Investigational Site

    Chiba, Chiba

  • Pfizer Investigational Site

    Hamamatsu, Shizuoka

  • Pfizer Investigational Site

    Kanazawa, Ishikawa-ken

  • Pfizer Investigational Site

    Okayama, Okayama-ken

  • Pfizer Investigational Site

    Shinjuku-ku, Tokyo

  • Pfizer Investigational Site

    Tokyo

  • Pfizer Investigational Site

    Tsu, Mie-ken

Other trials in Japan

About this study

Official title: A Phase 3, Multi-Center, Open-Label Study to Assess Safety and Efficacy of Sildenafil Citrate 20 mg TID in Subjects With Pulmonary Arterial Hypertension

To assess the safety of sildenafil 20 mg TID orally given to Japanese pulmonary arterial hypertension patients (Part 1 and 2) To assess the efficacy after 12 weeks of treatment of sildenafil 20 mg TID orally given to Japanese pulmonary arterial hypertension patients (Part 1)

Being tested
sildenafil citrate (UK-92,480)
Keywords
Pulmonary Arterial Hypertension, PAH
Medical subject headings
Hypertension, Pulmonary, Pulmonary Arterial Hypertension

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • sildenafil citrate (UK-92,480)Drug

    sildenafil citrate (UK-92,480)

Study groups in NCT00454207
Study groupRoleWhat they receive
sildenafil citrate (UK-92,480)Experimentalsildenafil citrate 20 mg TID
Receives: Drug: sildenafil citrate (UK-92,480)

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change in the 6-minute Walk Distance From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:6-minute walk distance at Week 12 minus 6-minute walk distance at baseline. The 6-minute walk distance:total distance walked during the 6-minute walk test.

    Measured: Baseline, Week 12

  2. Change in the Mean Pulmonary Arterial Pressure From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Mean pulmonary arterial pressure at Week 12 minus mean pulmonary arterial pressure at baseline.

    Measured: Baseline, Week 12

  3. Change in the Pulmonary Vascular Resistance From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Pulmonary vascular resistance at Week 12 minus pulmonary vascular resistance at baseline

    Measured: Baseline, Week 12

  4. Change in the Cardiac Output From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Cardiac output at Week 12 minus cardiac output at baseline

    Measured: Baseline, week 12

Secondary outcomes (30)
  1. Change in the 6-minute Walk Distance From Baseline at Week 8 in Participants Who Entered the Study From Part I

    Change:6-minute walk distance at Week 8 minus 6-minute walk distance at baseline.

    The 6-minute walk distance:Total distance walked during the 6- minute walk test.

    Measured: Baseline, Week 8

  2. Change in the Systolic Pulmonary Arterial Pressure From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Systolic pulmonary arterial pressure at Week 12 minus Systolic pulmonary arterial pressure at baseline.

    Measured: Baseline, Week 12

  3. Change in the Diastolic Pulmonary Arterial Pressure From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Diastolic pulmonary arterial pressure at Week 12 minus diastolic pulmonary arterial pressure at baseline.

    Measured: Baseline, Week 12

  4. Change in the Systolic Systemic Blood Pressure From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Systolic systemic blood pressure at Week 12 minus systolic systemic blood pressure at baseline.

    Measured: Baseline, Week 12

  5. Change in the Diastolic Systemic Blood Pressure From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Diastolic systemic blood pressure at Week 12 minus diastolic systemic blood pressure at baseline.

    Measured: Baseline, Week 12

  6. Change in the Mean Systemic Blood Pressure From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Mean systemic blood pressure:diastolic blood pressure+(systolic blood pressure-diastolic blood pressure)/3.

    Change:Mean systemic blood pressure at Week 12 minus mean systemic blood pressure at baseline.

    Measured: Baseline, Week 12

  7. Change in the Pulmonary Capillary Wedge Pressure From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Pulmonary capillary wedge pressure at Week 12 minus pulmonary capillary wedge pressure at baseline.

    Measured: Baseline, Week 12

  8. Change in the Right Atrial Pressure From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Right atrial pressure at Week 12 minus right atrial pressure at baseline.

    Measured: Baseline, Week 12

  9. Change in the Cardiac Index From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Cardiac index at Week 12 minus cardiac index at baseline.

    Measured: Baseline, Week 12

  10. Change in the Heart Rate From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Heart rate at Week 12 minus heart rate at baseline.

    Measured: Baseline, Week 12

  11. Change in the Pulmonary Vascular Resistance Index From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Pulmonary vascular resistance index at Week 12 minus pulmonary vascular resistance index at baseline.

    Measured: Baseline, Week 12

  12. Change in the Systemic Vascular Resistance From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Systemic vascular resistance at Week 12 minus systemic vascular resistance at baseline.

    Measured: Baseline, Week 12

  13. Change in the Systemic Vascular Resistance Index From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Systemic vascular resistance index at Week 12 minus systemic vascular resistance index at baseline.

    Measured: baseline, Week 12

  14. Change in the Mixed Venous Oxygen Saturation From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Mixed venous oxygen saturation at Week 12 minus mixed venous oxygen saturation at baseline.

    Measured: Baseline, Week 12

  15. Change in the Arterial Oxygen Saturation From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Arterial oxygen saturation at Week 12 minus arterial oxygen saturation at baseline.

    Measured: Baseline, Week 12

  16. Change in the Arterial Oxygen Partial Pressure From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Arterial oxygen partial pressure at Week 12 minus arterial oxygen partial pressure at baseline.

    Measured: baseline, Week 12

  17. Change in the Partial Pressure of Mixed Venous Oxygen From Baseline at Week 12 in Participants Who Entered the Study From Part I

    Change:Partial pressure of mixed venous oxygen at Week 12 minus partial pressure of mixed venous oxygen at baseline.

    Measured: Baseline, Week 12

  18. Changes in the World Health Organization (WHO) Functional Class of Pulmonary Arterial Hypertension From Baseline at Weeks 12 in Participants Who Entered the Study From Part I

    The cross-tabulation table on the WHO functional classes of pulmonary arterial hypertension at baseline and Week 12. The WHO functional classes of pulmonary arterial hypertension:Class I (pulmonary arterial hypertension patients with no limitation in physical activity) to Class IV (pulmonary arterial hypertension patients who can not perform a physical activity without any symptoms).

    Measured: Baseline, Week 12

  19. Changes in the BORG Dyspnoea Score From Baseline at Week 8 and Week 12 in Participants Who Entered the Study From Part I

    Change:BORG dyspnoea score at Week 8 and Week 12 minus BORG dyspnoea score at baseline. BORG dyspnoea score:Scale 0 (no breathlessness at all) to 10 (maximum). The score reflected the maximum degree of dyspnoea that the participants experienced at any time during the 6-minute walk distance.

    Measured: Baseline, Week 8, Week 12

  20. Changes in the the Plasma Brain Natriuretic Peptide Level From Baseline at Week 4, Week 8 and Week 12 in Participants Who Entered the Study From Part I

    Change:Plasma brain natriuretic peptide level at Week 4, Week 8 and Week 12 minus plasma brain natriuretic peptide level at baseline

    Measured: Baseline, Week 4, Week 8, Week 12

  21. Change in the 6-minute Walk Distance From Baseline at Week 12 in Participants Who Newly Entered the Study From Part II

    Change:6-minute walk distance at Week 12 minus 6-minute walk distance at baseline. The 6-minute walk distance:Total distance walked during the 6- minute walk test.

    Measured: Baseline, Week 12

  22. Change in the World Health Organization (WHO) Functional Class From Baseline at Week 12 in Participants Who Newly Entered the Study From Part II

    The cross-tabulation table on the WHO functional classes of pulmonary arterial hypertension at baseline and Week 12. The WHO functional classes of pulmonary arterial hypertension:Class I (pulmonary arterial hypertension patients with no limitation in physical activity) to Class IV (pulmonary arterial hypertension patients who can not perform a physical activity without any symptoms).

    Measured: Baseline, Week 12

  23. Changes in the BORG Dyspnoea Score From Baseline at Week 12 in Participants Who Newly Entered the Study From Part II

    Change:BORG dyspnoea score at Week 12 minus BORG dyspnoea score at baseline. BORG dyspnoea score:Scale 0 (no breathlessness at all) to 10 (maximum). The score reflected the maximum degree of dyspnoea that the participants experienced at any time during the 6-minute walk distance.

    Measured: Baseline, Week 12

  24. Changes in the the Plasma Brain Natriuretic Peptide Level From Baseline at Week 12 in Participants Who Newly Enterd the Study From Part II

    Change:Plasma brain natriuretic peptide level at Week 12 minus plasma brain natriuretic peptide level at baseline

    Measured: Baseline, Week 12

  25. Maximum Plasma Concentrations (Cmax) of Sildenafil and Sildenafil's Metabolite, UK-103,320

    Maximum plasma concentrations was calculated from the observed value of plasma concentrations in each participant

    Measured: Pre-dose, 0.5, 1, 1.5, 2, 4, 6, 8 hours after dosing

  26. Time to First Occurrence of Maximum Plasma Concentrations (Tmax) of Sildenafil and Sildenafil's Metabolite, UK-103,320

    Time to first occurrence of maximum plasma concentrations were calculated from the observed value of plasma concentrations in each participant.

    Measured: Pre-dose, 0.5, 1, 1.5, 2, 4, 6, 8 hours after dosing

  27. The Area Under the Curve (AUC) From Time 0 to Time 8 Hour of Sildenafil and Sildenafil's Metabolite, UK-103,320

    The area under the curve from time 0 to time 8 hour was calculated from area under the curve in each perticipant on the date of blood sampling using the linear/log trapezoidal rule

    Measured: Pre-dose, 0.5, 1, 1.5, 2, 4, 6, 8 hours after dosing

  28. The Average Plasma Concentration (Css,av) of Sildenafil at Steady State

    The average plasma concentration of sildenafil at steady state was calculated from the area under the curve from time 0 to 8 hour/dosing interval (8 hours).

    Measured: Pre-dose, 0.5, 1, 1.5, 2, 4, 6, 8 hours after dosing

  29. The Average Plasma Trough Concentration (Ctrough) of Sildenafil

    The average plasma trough concentration of sildenafil was calculated from the observed value before administration of the drug in each participants.

    Measured: Pre-dose, 0.5, 1, 1.5, 2, 4, 6, 8 hours after dosing

  30. Laboratory Test Abnormalities (Without Regard to Baseline Abnormality)

    The total number of participants with laboratory test abnormalities without regard to baseline abnormality.

    Measured: Baseline up to 1.3 years

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted30 Mar 2007 (estimated)
  2. Study startApr 2007
  3. Primary completionFeb 2009
  4. Study completionFeb 2009

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 3
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Single group
Masking
None (open label)
Enrolment
44 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00454207
Sponsor's protocol ID
A1481252
Other IDs
JapicCTI-070381
Status last verified
Jan 2021
First submitted
28 Mar 2007
Last updated
21 Feb 2021
Data monitoring committee
No

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing sildenafil citrate (UK-92,480) in people with Pulmonary Hypertension, run by Pfizer's Upjohn has merged with Mylan to form Viatris Inc. at 8 sites in Japan.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 21 Feb 2021. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 8 sites in Japan. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 9 Sep 2010). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change in the 6-minute Walk Distance From Baseline at Week 12 in Participants Who Entered the Study From Part I (time frame: Baseline, Week 12). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 21 Feb 2021.

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