Fildena 120 mg is marketed for the treatment of erectile dysfunction (ED) and is commonly associated with sildenafil, a phosphodiesterase type 5 (PDE5) inhibitor. However, formulations can vary by market, so the exact active ingredient and strength should always be confirmed on the packaging. If it contains sildenafil, it works by increasing blood flow to the penis during sexual stimulation, helping achieve and maintain an erection. It does not increase sexual desire and cannot produce an erection without sexual stimulation.