Hollow granular medicine and its preparation
US5057323A · kind A · utility
2Cited by
13References
4Claims
0Family size
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Key dates
| Filing date | Jun 19, 1989 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Jun 19, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/1676
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A granular medicine with slow drug-release characteristics that is sufficiently absorbed in the intestines, in which the granular medicine has a hollow spherical structure, a drug is dispersed in the shell, which mainly consists of an enteron-soluble polymer. The method for preparing the medicine includes the steps of: (a) mixing a hydrophilic or hydrophobic drug with an enteron-soluble polymer in a mixture of an aliphatic alcohol and a chlorohydrocarbon; and (b) pouring this mixture into water or an aqueous medium, and stirring the solution to precipitate the medicine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.