The symptoms of PAH may make doing activities like walking to the mailbox, taking a short stroll, or walking up stairs, difficult.

Because vessels in the lungs constrict and less blood is able to flow through them to the rest of the body, certain symptoms occur, such as shortness of breath, fatigue, and dizziness. These symptoms may get worse as the disease progresses, so it's important to talk to your doctor regularly about the symptoms you’re experiencing to see if adding Tyvaso could be right for you.

Click or tap the figure below to learn more about PAH symptoms.

  • Dizziness—this may happen when doing simple things like standing or climbing stairs because not enough oxygen is in the blood
  • Swollen face—caused by abnormal build-up of fluid in facial tissue
  • Fainting—can happen when your brain isn't getting enough oxygen. It is caused by reduced blood flow due to PAH. Let your doctor know immediately if you experience fainting spells
  • Cough—sometimes with blood
  • Hoarseness when talking—may be caused by enlarged vessels in the lungs pressing on a nerve
  • Chest pain—caused by not having enough oxygen in the blood
  • Shortness of breath—this is usually one of the first symptoms of PAH and is experienced upon slight exertion
  • Feeling tired or worn out—caused when not enough oxygen is getting into the blood and to other parts of the body
  • Swollen ankles and feet—caused by abnormal build-up of fluid in tissue
Next: Learn About the Causes of PAH


Before you take Tyvaso, tell your healthcare provider about all of your medical conditions, including if you:

It is important to tell your healthcare provider about all the medicines you may be taking, including prescription and non-prescription medicines, vitamins, and herbal supplements, as they may affect your use of Tyvaso by increasing the risk of side effects or decreasing effectiveness. Especially tell your healthcare provider if you take any of these medicines:

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 healthcare provider about any side effects that bother you or do not go away. Your healthcare provider 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, (ERA)) or sildenafil (a phosphodiesterase-5 (PDE-5) inhibitor). Your ability to do exercise decreases 4 hours after taking Tyvaso.

The effects of Tyvaso are unknown in patients under 18 years of age.


Please see the Full Prescribing Information, Patient Package Insert, and the Tyvaso Inhalation System Instructions for Use manual.

For additional information about Tyvaso, visit or call 1-877-UNITHER (1-877-864- 8437).

Call your healthcare provider for medical advice about side effects. You may report side effects to the FDA at or call 1-800-FDA-1088.

This information is provided for an informational purpose and is not intended as treatment advice. Patients should consult a healthcare professional for treatment advice.