Fildena is a generic medication containing sildenafil citrate, used for the treatment of erectile dysfunction (ED). As a phosphodiesterase type 5 (PDE5) inhibitor, it works by increasing blood flow to the penis during sexual stimulation, which facilitates the ability to achieve and maintain an erection. It is important to note that sexual arousal is required for the medication to be effective. Fildena is frequently marketed online and is often sold through unregulated channels, which presents significant risks regarding product authenticity, dosage accuracy, and purity. Side effects are consistent with sildenafil and include headache, facial flushing, and indigestion. Crucially, it is absolutely contraindicated for use with nitrate medications due to the risk of a severe and life-threatening drop in blood pressure. A comprehensive medical evaluation is essential to ensure the safe and appropriate use of this medication.