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Clinical trialNCT05343637CompletedPhase 2Interventional

A Dose Escalation Study to Evaluate the Effect of RT234 in Subjects With Pulmonary Arterial Hypertension

SponsorRespira Therapeutics, Inc.Enrollment14Pulmonary Arterial Hypertension
View the registry record on ClinicalTrials.gov

Summary

The lay summary the sponsor registered on ClinicalTrials.gov.

This multicenter, open label, Phase 2a study is designed to evaluate the effect of inhaled RT234 delivered in a dose escalation manner on the change in pulmonary vascular resistance (PVR) in subjects with Pulmonary Arterial Hypertension (PAH) undergoing Right heart catheterization (RHC). This study is also known as Vardenafil Inhaled for Pulmonary Arterial Hypertension PRN Phase 2a (VIPAH-PRN 2a) study
clinicaltrials.gov ↗

Investigators

The overall officials registered on this study. Names that resolve to a FindMyKOL profile link to it; the rest are shown as registered.

A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.

Sites

3 registered facilities, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.

Australia
  • St Vincent'S Hospital

    Darlinghurst, New South Wales, Australia

  • Royal Hobart Hospital

    Hobart, Tasmania, Australia

  • the Alfred Hospital

    Melbourne, Victoria, Australia

Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.

Drugs studied

No drug or biological interventions are in our data for this study. It may test a procedure, device or behavioral intervention, or the intervention list isn't in our current snapshot. See the registry record ↗. Why? →

Registration & key dates

Registry attributes as recorded on the ClinicalTrials.gov study record.

Start
30 Jul 2019
Primary completion
17 Jan 2020
Completion
17 Jan 2020
Last update posted
6 Apr 2026
Registered enrollment
14
Registry id
NCT05343637

Cross-registrations

ANZCTR (AU/NZ)ACTRN12619001178134
clinicaltrials.gov ↗

Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 11 Nov 2026. Registry facts are shown as registered by the study sponsor; FindMyKOL does not interpret them.