Vigore 100 mg is a medication used to treat erectile dysfunction (ED) in men. It contains the active ingredient Sildenafil Citrate, which is the same active ingredient found in Viagra. Sildenafil works by increasing blood flow to the penis during sexual stimulation, allowing men with ED to achieve and maintain an erection. By inhibiting PDE5, Sildenafil helps relax the blood vessels in the penis, increasing blood flow when the person is sexually aroused, thus allowing for an erection. Vigore 100 mg will not cause an erection on its own and requires sexual stimulation to work effectively.