DELAYED DELIVERY SYSTEM FOR ACID-SENSITIVE DRUGS

摘要

The present invention relates to a delayed release drug delivery system containing omeprazole capable of site-specific delivery and pulsatile (bolus) kinetics for once-a-day dosage comprised of an alkaline core structure sequentially layered with suspensions of omeprazole; a separation barrier; and an enteric barrier. The separation barrier is coated with a pH-dependent enteric membrane, which is relatively insoluble in gastric fluid but rapidly to immediately soluble in intestinal fluid, whereby the drug is released in a pulsatile manner in the proximal segment of the gastrointestinal tract.