Aurogra 100mg tablet belongs to a class of medicines called PDE-5 inhibitors. This works by relaxing the blood vessels in the penis. This causes blood to flow to the penis and causes an erection when you are sexually aroused. This Aurogra 100 will only cause an erection if you are sexually aroused. This is a very effective medicine but it should be consumed at least half an hour before sexual intercourse. Do not take this medicine if you are taking medicines called nitrates.