Vigora Tablet works by improving the flow of blood into the male genital organ for sexual arousal and as a result, this helps in maintaining the erection. Vigore 50 Red Tablet is a prescription medicine used to treat erectile dysfunction (impotence) in men. It works by increasing blood flow to the penis. Vigore 50 Red Tablet belongs to the group of medicines called phosphodiesterase type-5 (PDE 5) inhibitors, primarily used to treat erectile dysfunction