Vigore is a medication used to treat erectile dysfunction (ED) in men. It typically contains Sildenafil Citrate, which is the active ingredient found in medications like Viagra. Sildenafil helps increase blood flow to the penis, making it easier to achieve and maintain an erection when sexually aroused. The effects of Vigore typically last for about 4 to 6 hours, allowing a window of time for sexual activity. Sexual stimulation is necessary for Vigore to work, as it does not cause an erection on its own.