tadalafil

Cialis is also marketed as Adcirca for the treatment of pulmonary

The increase in sales and marketing expenses corresponds primarily to expenses incurred related to marketing our new products, Tyvaso and Adcirca.

Our increased stock price also highlights our mature pipeline, which has the potential for further growth through continued market penetration by Remodulin, our recent launch of Adcirca, the only once-daily PDE-5 inhibitor for PAH, and the expected launch of Tyvaso, our now FDA-approved inhaled prostacyclin analogue.

8 million increase in Adcirca revenues, primarily due to price increases.

It is important to note that Cialis is not to be taken with medicines called "nitrates" such as isosorbide dinitrate or isosorbide mononitrate which are often prescribed for chest pain; or with recreational drugs called "poppers" like amyl or butyl nitrite, as the combination may cause an unsafe drop in blood pressure; or if allergic to Cialis or Adcirca (tadalafil), or any of its ingredients.

The various drugs used to treat PAH are: Tracleer (bosentan), Letairis (ambrisentan), Remodulin (treprostinil), Ventavis (iloprost), Revatio (sildenafil), Adcirca (tadalafil), Tyvaso (inhaled treprostinil), and Veletri (epoprostenol).

United Therapeutics Corporation and Lung Rx, LLC announced today the launch of a nationwide support program for patients who are currently prescribed a United Therapeutics therapy, which includes Remodulin (treprostinil) Injection, Adcirca (tadalafil) tablets or Tyvaso (treprostinil) Inhalation Solution.

United Therapeutics' Chairman and CEO, stated, "United Therapeutics continued to deliver strong results in 2013, reflecting growing demand for our Remodulin, Tyvaso and Adcirca products.