The reason is:

Saccharin is an artificial sweet substance in food, but also a commonly used additive. It is mostly a sodium salt dissolved in water. Sweetness is about 450 to 500 times that of sucrose. A few hundred thousandths of saccharin can have a sweet flavor, in a dilute solution has a strong sweetness, the concentration increases instead of a bitter taste. China's food requirements saccharin not more than 1.5 / million.

Saccharin is a benzoic acid derivative, known as o-benzoyl sulfoximine. Saccharin on the human body is toxic or not, the understanding is not unanimous. Some people believe that saccharin in large quantities has an irritating effect on the mucous membranes, especially on the gastrointestinal mucous membranes and kidneys, and some people believe that saccharin is toxic, and reported that due to a number of consecutive overconsumption of saccharin and poisoning, and even death.

After taking a large amount of saccharin (more than 5 grams), about 2 hours can be bad, vomiting water, persistent pain around the umbilicus with paroxysms of colic, abdominal distension, dizziness, thirst, urination, and a drop in blood pressure. Urine examination has red blood cells, also some have muscle twitching and pain, mild convulsions, delirium, hallucinations and so on. In patients with severe poisoning, it can cause death or leave behind severe peripheral neuritis (mostly due to overdose at one time as well as several times in a row).

In the treatment of no special drugs yet, mainly symptomatic treatment, hair immediately wash the stomach, antispasmodic, analgesic, give vitamins B, C, supplementation of glucose saline solution, accelerate the excretion and so on.