Sildenafil Citrate works by increasing blood flow to the penis during sexual stimulation, thereby helping men achieve and maintain an erection. Fildena 25 mg is available in tablet form and is typically taken orally with water.It's important to use Fildena 25 mg under the guidance of a healthcare professional. Your healthcare provider can assess your suitability for the medication, provide dosage recommendations, and discuss potential risks and benefits.