PARSIPPANY, N.J. — The Food and Drug Administration has approved a generic drug for pulmonary arterial hypertension made by Watson Pharmaceuticals, the drug maker said Monday.

Watson said the FDA approved its sildenafil tablets in the 20 mg strength through a subsidiary. Watson said it would launch the drug "in the near future."

The drug is a generic version of Pfizer's Revatio tablets, which had sales of about $339 million during the 12-month period ended in September, according to IMS Health.

Interested in this topic? Sign up for our weekly DSN Collaborative Care e-newsletter.