PAH-Info.com June 15, 2010[email protected] Join the Registry Learn more about: Pulmonary Arterial Hypertension Related Access Program Pfizer – Pulmonary Arterial Hypertension (PAH) Pfizer – Pulmonary Arterial Hypertension Bayer – Pulmonary arterial hypertension Actelion website dedicated to Pulmonary Arterial Hypertension.