Vomiting too much even without ipecac can cause serious health problems - esophageal erosion, enamel erosion and gum erosion in addition to other problems. Please get help for the bulimia instead. Ipecac isn't standard practice and only should be used under a doctor or poison control advice. If its used too much it can hurt you.
http://www.mayoclinic.com/health/dru...ION=proper-use

On this site it discusses misuse of ipecac:

http://en.wikipedia.org/wiki/Syrup_of_ipecac