Discover how adding Tyvaso to your oral therapy could help you improve your exercise ability.

Access tips and tools for staying on track and getting the most from your treatment.

Important Safety Information for Tyvaso

Other medical conditions and medicines may affect your use of Tyvaso by increasing the risk of side effects or decreasing effectiveness. It is important to tell your doctor about your medical conditions and any medicines you may be taking, including:

The most common side effects of Tyvaso are coughing, headache, throat irritation and pain, nausea, reddening of the face and neck (flushing), and fainting or loss of consciousness. These are not all the possible side effects of Tyvaso. Tell your doctor about any side effects that bother you or do not go away. Your doctor may be able to help you manage the side effects.


Tyvaso is a prescription medicine used in adults to treat pulmonary arterial hypertension (PAH) (WHO Group 1), which is high blood pressure in the arteries of your lungs. Tyvaso can improve exercise ability in people who also take bosentan (an endothelin receptor antagonist) or sildenafil (a phosphodiesterase type 5 inhibitor). The effects decrease over 4 hours; treatment timing can be adjusted for planned activities.

Studies establishing effectiveness included predominately patients with NYHA Functional Class III symptoms and etiologies of idiopathic or heritable PAH (56%) or PAH associated with connective tissue diseases (33%).

For more information about Tyvaso, please see Full Prescribing Information, Patient Package Insert, and Tyvaso Inhalation System Instructions for Use manual. Questions? Call the Customer Service Line at 1-877-UNITHER (1-877-864-8437).

Please note that this website does not collect or report side effects. If you are taking Tyvaso and have experienced or are experiencing a potential side effect, please inform your doctor.

You may also contact United Therapeutics Corporation at 1-877-864-8437 or via e-mail at to report suspected side effects, or contact the FDA at 1-800-FDA-1088 or