The aforementioned Fildena 100 can be used to treat erectile dysfunction. Medicines can be injected or taken as suppositories for the p*nis. These drugs work by improving the efficiency of nitrous oxide (NO). NO allows engorgement and erection by dilating the blood vessels inside the p*nis. Oral injections of apomorphine or apomorphine are also used to treat this problem. There are also various herbal treatments to treat the problem of erectile dysfunction. These herbs help achieve an erection by improving blood flow to the p*nis.