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
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.
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
Biologics
Combination Medications
Helps blood vessels stay open
Page last updated: August 18, 2026
