Click here to buy now Caverta 100 Tablet is used to treat erectile dysfunction in men. It works by increasing blood flow to the penis. This helps men to get or maintain an erection. It belongs to a group of medicines known as phosphodiesterase inhibitors. You should never take more than 100 in one day. Even if you're on a lower dose, you should still only take one tablet a day and talk to a doctor first before increasing your dose.