Extended release microparticles comprising drug, and preparation method therefor
US11504688B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 2018 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Sep 1, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to extended release microparticles comprising a drug, and a preparation method therefor, and when the extended release microparticles comprising a drug are administered in order to replace conventional drugs that should be administered daily or monthly, the drug administration effect can be continuously maintained for one week to three months.In addition, the drug administration effect is maintained for a long time and, simultaneously, microparticles are prepared so as to have the average diameter of a fixed micro-size, and thus an effective drug concentration can be constantly maintained by controlling the release of the drug from the microparticles, and a foreign body sensation and pain can be reduced during drug administration since microparticles having a uniform size are included during application as an injectable drug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.