Whether or not you can continue with the test after vomiting half of the laxative you drank for the colonoscopy needs to be decided based on the condition of the bowel movements. If the stool is already clear water stool without fecal matter, you can also carry out the examination, otherwise you can continue to clean the intestine by additional medication, saline enema and other methods. The quality of bowel cleansing is a guarantee of the diagnostic accuracy or therapeutic safety of colonoscopy. The first and foremost requirement in the standard of bowel preparation is a clean bowel free of feces. If the amount of laxative taken to clear the bowel prior to the colonoscopy is insufficient, it will result in incomplete bowel cleansing, which will cause the diseased tissues to be invisible during the colonoscopy. When treating lesions through colonoscopy, if the bowel is not cleared thoroughly, it can also cause infection or failure of the procedure. Therefore, enteroscopy drinking laxatives spit half, if the stool has been no fecal matter of clear water stool, you can also carry out the examination, otherwise it is not possible to immediately do the colonoscopy, you can continue to clean the intestinal tract through additional drugs, saline enema and other methods. If the above situation occurs, it is recommended to clean the intestines under the guidance of a doctor before performing colonoscopy to avoid adverse effects.