COVID-19 is an emerging, rapidly evolving situation.
Get the latest public health information from CDC:

Get the latest research information from NIH:

Key Record Dates Identifier: NCT00125918
Brief Title: PHIRST-1: Tadalafil in the Treatment of Pulmonary Arterial Hypertension

First Submitted : August 1, 2005
First Submitted that Met QC Criteria : August 1, 2005
First Posted : August 2, 2005 (Estimate)

Last Update Submitted that Met QC Criteria : February 13, 2008
Last Update Posted : February 21, 2008 (Estimate)