Men with erectile dysfunction, or impotence, can be treated with the prescription medication Filagra gel shots. It functions by boosting penile blood flow. This aids in the erection and maintenance of males. It is recommended that you take this medication half an hour prior to sexual activity in order to fully enjoy your time with your partner. This medication can be used either before or after meals. This medication works best when taken with water; do not break or chew the tablet as this will decrease its effectiveness.