Silagra is a medication that contains sildenafil, primarily used to treat erectile dysfunction. It works by relaxing the blood vessels in the penis, helping men regain their natural ability to achieve and maintain an erection. But that's not all—it's also effective in managing pulmonary arterial hypertension (PAH), which can improve exercise tolerance for both men and women. Your primary care physician might prescribe it for you to take either orally or through an IV.