The "best pill," Silagra (sildenafil citrate), is a medication that men with impotence can use. This tablet aids in increasing blood flow through the penile to assist a man attain and maintain a long-lasting erection. The best results from this medicine are seen when taken 30 minutes before sexual activity. Don't chew or crush the Silagra pill; instead, take it with water. You can take this medication with or without food.