Fildena 50 contains Sildenafil Citrate, a phosphodiesterase type 5 (PDE5) inhibitor. This compound works by increasing blood flow to the penis during sexual stimulation, helping men achieve and maintain an erection. Like other PDE5 inhibitors, Fildena 50 may cause side effects such as headache, flushing, nasal congestion, indigestion, and dizziness in some individuals. It's important to discuss any medical conditions, medications, or concerns with a healthcare provider before using Fildena 50 to ensure its safety and suitability for individual needs.