Long-lasting multi-layered film preparation
US4552751A · kind A · utility
63Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1981 |
| Grant date | Nov 12, 1985 |
| Priority date | — |
| Expiry date | Oct 19, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K31/557
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention provides multi-layered film preparations which comprise one or more water soluble polymer bases, one or more water insoluble polymer bases, one or more plasticizers and one or more prostaglandins, and optionally contain one or more organic acids, and they are composed of at least two drug release controlling layers and one or more drug storing layers. The multi-layered film preparations of the present invention are characterized by that the prostaglandin(s) containing therein exhibit the desired long-lasting release patterns at the concentration required for therapeutic purpose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.