Sodium picosulfate enteric-coated tablet and preparation method thereof

The invention belongs to the field of pharmaceutical compositions for treating constipation, and in particular relates to a sodium picosulfate enteric-coated tablet and a preparation method thereof. In vitro leaching test results show that according to the sodium picosulfate enteric-coated tablet prepared by the preparation method disclosed by the invention, the vast majority of active components can be released in an physiological environment which simulates the colon with pH greater than 7, so that gastrointestinal discomfort caused by premature release of sodium picosulfate can be effectively avoided so as to alleviate the adverse reaction of the tablet.