Condition

Pulmonary Arterial Hypertension (PAH) (WHO Group 1 PH) clinical trials and research

• 7Clinical trials
• 4Countries

Newest Pulmonary Arterial Hypertension (PAH) (WHO Group 1 PH) clinical trials

All recruiting trials (7)

• Add-on Sildenafil Before Exercise in PAH to See if Max Workload Improves

  This study tests whether taking 20 mg sildenafil right before exercise helps people with pulmonary arterial hypertension perform more work during cardiopulmonary testing.

  Recruiting Phase 2/3 University of Zurich · Zurich, Canton of Zurich · NCT07824674

• Nailfold Capillaroscopy in Pulmonary Hypertension

  This study tests whether nailfold capillary scans correlate with invasive lung blood pressure measurements and whether these patterns change with PH treatment.

  Recruiting University of Glasgow · Clydebank, West Dunbartonshire · NCT07768644

• Rutgers Genetics of Pulmonary Hypertension

  This online project will try to see if genetic differences affect the risk of pulmonary hypertension in U.S. adults, and anyone 18 or older can join whether or not they have PH.

  Recruiting Rutgers, The State University of New Jersey · Piscataway, New Jersey · NCT07217522

• Testing a patient questionnaire about pulmonary hypertension knowledge

  This project will test a questionnaire to measure what adults with pulmonary arterial hypertension know about their condition, treatments, and self-care.

  Recruiting University of Sao Paulo General Hospital · São Paulo, São Paulo · NCT07120789

• Switching endothelin receptor medicines and risk in pulmonary arterial hypertension

  This study will try switching adults with PAH from ambrisentan to bosentan to see if the change alters their clinical risk profile and liver safety.

  Recruiting University of Sao Paulo General Hospital · São Paulo, São Paulo · NCT07013149

• Timing of pulmonary arterial hypertension diagnosis in Brazil

  We will see how long it takes adults with pulmonary arterial hypertension in Brazil to get a confirmed diagnosis and what causes delays.

  Recruiting University of Sao Paulo General Hospital · São Paulo, São Paulo · NCT06998329

• Improving adherence to PAH treatment with telemedicine and patient guidance

  This study will try whether regular telemedicine check-ins and guided education help people with PAH stick to their oral medications and manage side effects.

  Recruiting University of Sao Paulo General Hospital · São Paulo, São Paulo · NCT06850792

Related topics

Quick answers

How many Pulmonary Arterial Hypertension (PAH) (WHO Group 1 PH) clinical trials are recruiting right now?

7, as of November 12, 2026. We update this list each time we refresh our data from ClinicalTrials.gov.

Where are these trials running?

In 4 countries. The most sites are in Brazil (4 trials), United States (1 trial), United Kingdom (1 trial), Switzerland (1 trial). Each study page lists its sites and which ones are recruiting.

What phases are they in?

Phase 2/3: 1. Trials with no phase listed are usually device, behavioural or observational studies.

How do I join one?

Open a study, check the "Is this trial a fit for you?" section, then contact the study team listed on the page. They will ask a few screening questions. Asking is free and does not commit you to anything. Talk it over with your doctor first.

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