Vigore drug is a phosphodiesterase type 5 inhibitor, indicated for erectile dysfunction (impotence). Erectile dysfunction is the inability to achieve or maintain an erection long enough to have sexual intercourse. It relaxes the blood vessels in the penis, allowing more blood to enter to achieve an erection. You can take this medicine before or after meals. The effect of this medicine lasts for 4 to 6 hours. Take this medicine as per the doctor's advice.