Sildenafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow easily. What side effects can this medication cause? Sildenafil Liqrev, Revatio is used to improve the ability to exercise in adults Liqrev, Revatio and children 1 year of age and older Revatio with pulmonary arterial hypertension PAH; high blood pressure in the vessels carrying blood to the lungs, causing shortness of breath, dizziness, and tiredness. When oral medications might not be safe Check with your health care team before you take any medicine for erectile dysfunction. You can take it in a small dose daily or in a larger dose as needed.Generic Names: Sildenafil Citrate Brand Names: Revatio Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). Learn more about . MinuteClinic can treat over different conditions. Find a walk in location near you today. Sildenafil (Liqrev, Revatio) is used to improve the ability to exercise in adults (Liqrev, Revatio) and children 1 year of age and older (Revatio) with pulmonary arterial .