Vega 100mg Tablet is a prescription drug used to treat erectile dysfunction (weakness) in males. It works by increasing blood flow to the penis. This aids men in obtaining and maintaining an erection. It belongs to a class of medications known as phosphodiesterase type 5 (PDE 5) inhibitors. can be taken on an empty stomach or with a meal. It should be taken exactly as directed by your PCP. You should allow at least an hour before you plan to have intercourse.