Vigora 100 Red tablet is a prescription medicine prescribed for erectile dysfunction (impotence) in men. Vigore 100 Red Tablet is a prescription medicine used to treat erectile dysfunction (impotence) in men. It works by increasing blood flow to the penis. Vigore 100 Red Tablet belongs to the group of medicines called phosphodiesterase type-5 (PDE 5) inhibitors, primarily used to treat erectile dysfunction