Silagra is a medication containing Sildenafil Citrate, prescribed to treat erectile dysfunction (ED). As a PDE5 inhibitor, it works by enhancing blood flow to the penis following sexual stimulation, which helps to achieve and maintain an erection. The effects of Silagra typically last for 4-6 hours. A prescription from a healthcare provider is necessary to ensure the medication is used safely and at the correct dosage for the individual.