It can cause the right side of a person’s heart to work harder than normal, which can lead to shortness of breath.
There is no cure for the disease, but Opsumit is one of several drugs that can treat its symptoms.
The new drug was subjected to a long-term clinical trial involving more than 700 participants.
“In the study, Opsumit was effective in delaying disease progression, a finding that included a decline in exercise ability, worsening symptoms of PAH or need for additional PAH medication,” the FDA said in a statement on Friday.
Side effects include anemia, symptoms similar to the common cold and flu, and urinary tract infection.
Pregnant woman should not take the drug, the FDA warned, because it can harm the fetus.