Fildena 150mg contains sildenafil, a PDE5 inhibitor used to help manage erectile dysfunction (ED) in adult men. It works by increasing blood flow to the penis when sexual stimulation occurs, helping support an erection suitable for sexual activity. Fildena does not increase sexual desire and cannot produce an erection without stimulation. Since 150mg is a relatively high sildenafil dose, it should be used only under the guidance of a healthcare professional. Common side effects may include headache, facial flushing, dizziness, indigestion, nasal congestion, and temporary vision changes. Fildena should not be taken with nitrate medicines because of the risk of a significant drop in blood pressure.