Doctors are required by law to notify you of the risks with any procedure and it is done in writing on a form which you must sign. The problem is that most people sign the forms because the doctor said they should, and never ask questions.
When you are having a medical procedure done, never sign any forms that you do not completely understand. Ask the doctor, and if you don't understand what he said, ask your nurse! Don't sign until you are confident that you understand what you are signing.
Conversely, just because something is listed as a possible side effect does not mean that you will have it, just that someone, somewhere did at one time.