 A gastric rupture is when there is a sudden rupture of the stomach lining that can be fatal.The acids that are contained in the vomit can cause a rupture in the esophagus as well as tooth decay.As a result, to laxative abuse, irregular bowel movements may occur along with constipation.Sores along the lining of the stomach called peptic ulcers begin to appear and the chance of developing pancreatitis increases.