Caverta 100 mg contains the active ingredient Sildenafil citrate, which is categorized under the drug class phosphodiesterase type 5 inhibitors. Sildenafil relaxes the blood vessels in your penis, allowing blood to flow into the penile muscles. The medicine will help you get an erection if you are sexually aroused. It can help many adult men who have erectile dysfunction and help a man to achieve an erection when he became sexually excited. Taking the pill will not get you an erection, Caverta helps a man with ED get an erection only on sexual arousal. Medicine enables men to respond to sexual stimulation. It helps the penis fill with enough blood to cause an erection for a satisfactory intimate session. The medicine does not protect you from getting sexually transmitted disease including HIV.