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PAH Medication & Treatment Guide

Learn more about the different types of medications that can help manage your PAH symptoms.
Young woman touches chest while talking to doctor. Young woman touches chest while talking to doctor.

There are a variety of medicines available to treat your pulmonary arterial hypertension. The medicines for PAH work in a few ways. Some allow blood to flow more easily through the arteries of your lungs. Others help your heart and lungs work better. The medications you take may be pills, inhaled through a device, injected under the skin (subcutaneous) or delivered through an intravenous (IV) infusion. Many people living with PAH take a combination of medications rather than a single drug. Using medicines that work in different ways can help manage the disease more effectively and may improve health outcomes.  It is important to work with your PAH specialist, a lung doctor or a heart doctor who is experienced in treating this disease, to find the treatment plan that is right for you.

Types of Medications to Manage PAH

Current therapies used to manage PAH treat specific pathways, Select a medication pathway below to learn more about what each medication does, common side effects and additional information. 

Nitric Oxide Pathway

What It Does: Helps relax and widen blood vessels in the lungs, improving blood flow and reducing strain on the heart

Medication Names: Tadalafil, Sildenafil

What It Does: Helps relax and widen blood vessels in the lungs, making it easier for blood to flow through them 

Common Side Effects: Headache, flushing (warmth and redness in the face, neck and upper chest), dizziness, upset stomach, runny or stuffy nose, muscle pain, back pain

Delivery Method: Oral

Additional Information: May improve ability to do physical activity and help slow disease from getting worse.

Medication Names: Riociguat (Adempas ®)

What It Does: Helps relax and widen blood vessels in the lungs, allowing blood to flow more easily.

Common Side Effects: Headache, indigestion, nausea, dizziness, low blood pressure, anemia, constipation.

*Note: Riociguat must not be used at the same time as PDE5 inhibitors (e.g. sildenafil or tadalafil) due to the risk of significant hypotension.

Delivery Method: Oral

Additional Information: May improve ability to do physical activity and help slow the disease from getting worse.

Endothelin Pathway

What It Does: Blocks the effects of endothelin, a substance that causes blood vessels in the lungs to narrow. This helps blood vessels stay open and improve blood flow.

Medication Names: Bosentan, Ambrisentan, Macitentan

What It Does: Helps relax and widen blood vessels in the lungs, making it easier for blood to flow and reducing strain on the heart. 

Common Side Effects: Headache, swelling in ankles, feet, legs and abdomen, flushing (warmth and redness in the face, neck and upper chest), cold-like symptoms, unusual or rapid weight gain or weight loss, tingling of hands or feet.

*Note: Bosentan, ambrisentan and macitentan can cause harm to an unborn baby. Talk to your provider about potential risks and discuss family planning, including the need for effective birth control. 

Delivery Method: Oral

Additional Information: May improve ability to do physical activity and helps slow disease progression.

Prostacyclin Pathway

What It Does: Helps relax and widen blood vessels in the lungs, helps prevent blood clots from forming, helps prevent blood vessels from becoming thicker and narrower

Medication Names: Epoprostenol (Flolan®, Veletri®), Treprostinil (Remodulin®, Orenitram®, Tyvaso®)Iloprost (Ventavis®), Tyvaso DPI (inhaled)

What It Does: Helps relax and widen blood vessels in the lungs, making it easier for blood to flow through them

Common Side Effects: Flushing, headache, muscle pain, cough, diarrhea, nausea, vomiting, indigestion, throat irritation, flu-like symptoms, rash

Delivery Method: Oral, inhaled, intravenous (IV) or subcutaneous

Additional Information: May improve ability to do physical activity, reduce symptoms and help slow disease progression

Medication Names: Selexipag ((Uptravi®)

What It Does: Helps relax and widen blood vessels in the lungs.

Common Side Effects: Headache, jaw pain, muscle pain, joint pain, flushing, rash, anemia, nausea

Delivery Method: Oral

Additional Information: May slow disease from getting worse

Biologics

Medication Names: Sotatercept-csrk (Winrevair)-Biologic

What It Does: Helps reduce the risk of PAH worsening events, including hospitalization and the need for transplantation, or death.

Common Side Effects: Headache, nosebleed, rash, tiny blood vessels that look pink or red on the skin, diarrhea, dizziness, redness

*Note: While taking this medication, you will need regular blood tests to monitor your blood cell and platelet levels and check for an increase in red blood cells. Your healthcare provider will want to monitor you closely to ensure this treatment remains safe for you.

Delivery Method: Subcutaneous (under-the-skin) injection

Additional Information: Improves ability to do physical activity, reduces the risk of physical condition and symptoms getting worse

Combination Medications

Helps blood vessels stay open

Medication Names: Opsynvi®

What It Does: Helps prevent narrowing and remodeling of blood vessels in the lungs Common Side Effects: Edema/fluid retention, anemia, and headache/migraine

Delivery Method: Oral

Additional Information: May help slow disease progression, reduce the risk of hospitalizations for PAH and  improve ability to do physical activity

Talk to an Expert

Our Lung HelpLine is staffed by registered nurses and respiratory therapists ready to help answer your questions about PAH.
Contact HelpLine

Manage Your Medications

Use this tracker to manage what medications you are taking, what the medication is for, possible side effects, and more.
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Free Medication Tracker App

Use this FREE medication app tracker to manage your medications, track symptoms, and more.
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Page last updated: August 18, 2026

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