One medicine brand called Caverta has sildenafil as its primary component. For men, it is mostly used to treat erectile dysfunction (ED). One of the active ingredients in Caverta is sildenafil, which is categorized as a phosphodiesterase type 5 (PDE5) inhibitor. Men who have trouble getting and keeping an erection are the main patients prescribed caverta. It helps men with ED attain and maintain an erection appropriate for sexual activity by boosting blood flow to the penis.