The United States Pharmacopeia (USP) defines delayed-release tablets as enteric-coated to delay release of the medication until the tablet has passed through the stomach to prevent the drug from being destroyed or inactivated by gastric juices or where it may irritate the gastric mucosa. USP defines extended-release tablets "formulated in such a manner to make the contained medicament available over an extended period of time following ingestion.
可能不是你说的那个区别,你核实一下!
选自:http://drugtopics.modernmedicine.com/drug-topics/news/clinical/pharmacy/fda-safety-page-delayed-release-vs-extended-release-rxs?page=full