Fildena 50 mg contains sildenafil citrate as its active ingredient. Sildenafil is a phosphodiesterase type 5 (PDE5) inhibitor used to treat erectile dysfunction (ED) by increasing blood flow to the penis. Sildenafil Citrate – This is the component responsible for the medication's effect on erectile dysfunction. Helps with the disintegration of the tablet. These inactive ingredients help to stabilize the medication and ensure that it dissolves properly in the body. Always refer to the specific product packaging or consult with a pharmacist for the exact composition used in the version you have. Used as a binder or filler.