Riociguat lowers blood pressure in your lungs, helping your heart pump blood more efficiently. Riociguat is used to treat chronic thromboembolic pulmonary hypertension (CTEPH) in people who cannot be treated with surgery, or in people who have undergone surgery but still have symptoms. Riociguat can treat certain symptoms of CTEPH and can improve your ability to exercise. Riociguat is used to treat pulmonary arterial hypertension (PAH). Riociguat can improve your ability to exercise and help prevent PAH from getting...