PAH’s Two Main Players Edging Toward Head-To-Head Competition

Although Pfizer Inc. and Gilead Sciences can be found at its margins, the pulmonary arterial hypertension space largely is a two-company competition. Currently, the two main players – United Therapeutics Corp. and Switzerland's Actelion Ltd. – have staked out a competitive advantage in a different portion of the space, but they are about to compete directly.