Our Lubbock, TX gastroenterology team will give you information on how best to prepare for an ERCP procedure. However, a few instructions you might be advised to follow are: Do not eat or drink for eight hours before your ERCP procedure. (Water may be okay to drink. Ask your physician for confirmation.) Do not smoke for eight hours before your ERCP appointment. Give your GI physician a list of medications you are currently taking along with any known allergies you may have.