Men who are suffering from the problem of angina or chest pain cannot take Levitra without a doctor’s prescription. The intake of Levitra can cause an unbearable amount of change in the blood pressure level. A person who is on the dose of Levitra can experience an unanticipated diminishing or the reduction of vision in a single or both the eyes. There can also be an echo in the ears, an unexpected reduction in the hearing, and a nauseated feeling for some time. If anyone experiences these symptoms for a very long period of time, it will be quite beneficial to give a call to the doctor immediately. There is an exceptional risk of erection lasting for a period of more than 4 hours as in case of all the erectile dysfunction drugs. Levitra can not offer the user any kind of a protection against the STD’s or the sexually transmitted diseases.