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Note: This record shows only 22 elements of the WHO Trial Registration Data Set. To view changes that have been made to the source record, or for additional information about this trial, click on the URL below to go to the source record in the primary register.
Register: JPRN
Last refreshed on: 17 October 2023
Main ID:  JPRN-UMIN000005464
Date of registration: 19/04/2011
Prospective Registration: No
Primary sponsor: Hamamatsu University School of Medicine
Public title: Drug interactions and effects of combination therapy for pulmonary arterial hypertension
Scientific title: Drug interactions and effects of combination therapy for pulmonary arterial hypertension - Drug interactions and effects of PAH combination therapy
Date of first enrolment: 2011/04/01
Target sample size: 15
Recruitment status: Recruiting
URL:  https://center6.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000006480
Study type:  Interventional
Study design:  Factorial Non-randomized  
Phase:  Not applicable
Countries of recruitment
Japan
Contacts
Name:     Kazuhiko Takeuchi
Address:  1-20-1 Handayama Higashi-ku Hamamatsu Japan Japan
Telephone: 053-435-2385
Email:
Affiliation:  Hamamatsu University School of Medicine Clinical Pharmacology and Therapeutics
Name:     Kazuhiko Takeuchi
Address:  1-20-1 Handayama Higashi-ku Hamamatsu Japan Japan
Telephone: 053-435-2385
Email: takeutik@hama-med.ac.jp
Affiliation:  Hamamatsu University School of Medicine Clinical Pharmacology and Therapeutics
Key inclusion & exclusion criteria
Inclusion criteria:
Exclusion criteria: Unstable disease conditions. Disabilities of walk. Home oxygen therapy. Ineligible patients judged by principal. investigator.

Age minimum: 20years-old
Age maximum: Not applicable
Gender: Male and Female
Health Condition(s) or Problem(s) studied
pulmonary arterial hypertension
Intervention(s)
phase 1: sildenafil (60mg/day) and bosentan (250mg/day) for 4 or 5 weeks
phase 2: sildenafil(60mg/day) and ambrisentan (5mg/day) for 4 or 5 weeks
phase 3: tadalafil (40mg/day) and ambrisentan (5mg/day) for 4 or 5 weeks
Primary Outcome(s)
Pharmacokinetics in the last week of each phase: sildenafil, bosentan, ambrisentan and tadalafil. Exercise tolerability test: 6 minute walk test, shattle walking test and maximal oxygen consumption test.
Secondary Outcome(s)
Secondary ID(s)
Source(s) of Monetary Support
Hamamatsu University School of Medicine
Secondary Sponsor(s)
University of Shizuoka
Ethics review
Status: YES
Approval date:
Contact:
Results
Results available: Yes
Date Posted:
Date Completed: 01/03/2014
URL:
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