| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2ca2e4410855da087e11bf3eea8933fa |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K9-205
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K9-2054
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K9-2077
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K9-2027
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K9-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61P31-04 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K31-545
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K47-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K9-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K9-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K9-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61P31-04 |
| filingDate |
1988-02-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_39bf55ad2c5465f972f0e9b752750f3c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3436f971ce610e5beb61abcecae9d9dc |
| publicationDate |
1991-04-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
HU-202747-B |
| titleOfInvention |
Process for producing long-acting pharmaceutical compositions in tablet form |
| abstract |
This invention provides a matrix composition for sustained drug delivery which is comprised of an active agent, a hydrophilic polymer and an enteric polymer. The enteric polymer is impermeable to gastric fluids and aids in retarding drug release in regions of low pH, thus allowing lower levels of hydrophilic polymer to be employed. At the pH range of intestinal fluids, this polymer will dissolve and thereby increase the permeability of the dosage form. This approach is useful in sustaining the release of numerous active agents whose solubility declines as the pH is increased, a characteristic of weakly basic drugs. By responding to changes in physiological pH, these sustained release dosage forms have acceptable performance, in spite of variability in the gastrointestinal transit times of the formulation. |
| priorityDate |
1987-02-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |