Novel excipient and pharmaceutical composition containing the same
US4159345A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1978 |
| Grant date | Jun 26, 1979 |
| Priority date | — |
| Expiry date | Jan 31, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/2054
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An excipient for use in manufacture of tablets, capsules, powders, microgranules and granules which consists essentially of a microcrystalline cellulose having an average degree of polymerization of 60 to 375 and obtained through acid hydrolysis or alkaline oxidative degradation of a celulosic substance selected from linters, pulps and regenerated fibers, said microcrystalline cellulose being a white cellulosic powder having an apparent specific volume of 1.6 to 3.1 cc/g, a repose angle of 35.degree. to 42.degree., a 200-mesh sieve residue of 2 to 80% by weight and a tapping apparent specific volume of at least 1.4 cc/g and a pharmaceutical composition comprising a pharmaceutically active ingredient and the excipient. This excipient has improved flowability and moldability or compressibility whereby excellent pharmaceutical preparations may be easily provided. In addition, pharmaceutical compositions obtained using such excipient are excellent in various pharmaceutical characteristics such as rate of disintegration, rate of dissolution, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.