It makes you vomit. Ipecac used to be a solution to overdose and eating or drinking harmful stuff, particularly by a child, or as a suicidal attempt. Ipecac, if given early, will have you throw up almost all harmful stuff. That was the reason it was used at hospital emergency room quite often. However, los of times, people aspirate the vomitus into air tube and in the lungs. That causes pneumonia, and breathing probl.