CI

At a glance

ClinicalIndex Comparison Record
Phase 2Completed· 73 enrolled
Drug / intervention
Metformin +3 moredrug
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT03617458
NCT03617458Phase 2Completed

Interventions Against Insulin Resistance in Pulmonary Arterial Hypertension

Vanderbilt University Medical Center·interventional·Posted Aug 6, 2018·Updated Sep 22, 2025

In Brief

A Phase 2 clinical trial evaluating Metformin, Placebo, and 2 other interventions for Pulmonary Artery Hypertension. Completed, enrolled 73 participants across 1 site.

Detailed Summary

The primary objective of this study is to determine the impact of two interventions against insulin resistance on the composite endpoint of 10% improvement in baseline six minute walk distance or improvement in World Health Organization (WHO) functional class in humans with pulmonary artery hypertension (PAH).

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesUnited States

Timeline

Phase 2CompletedFinished
20192020202120222023202420252026
First PostedAug 6, 2018
Enrollment StartAug 23, 2018
Primary CompletionSep 9, 2023
Study CompletionAug 19, 2025
TodayJul 2, 2026
Enrollment to primary: 5.0 yearsPosted 7.9 years ago

Interventions

Metformindrug

Metformin is a drug has been on the market for several decades and is considered first line therapy for diabetes mellitus type 2.

Placebodrug

A treatment with no active ingredients or therapeutic effect.

mHealth Interventiondevice

Our Health Insurance Portability and Accountability Act (HIPAA) compliant texting platform is linked to the Fitbit Application Program Interface. Real time activity data will be transmitted from the subject's smartphone to our mHealth platform via cellular network.Subjects assigned to the texting arm will receive 3 texts/day in sync with their preferred morning, lunch, and evening leisure schedule, which is defined at enrollment. These texts will use personal, disease-specific, and provider information to deliver 2 types of messages customized to the current step count and sent in equal proportion. Messages are designed to facilitate self-awareness, reinforce step targets, and link physical activity with a reward or memorable cue.

Usual Caredevice

Our HIPAA data will be transmitted from the subject's smartphone to our mHealth platform via cellular network.