Wegner & Bretschneider
Sustained-release preparation and production thereof
 The present invention concerns a sustained-release microcapsule preparation comprising an ion exchange resin with 6 to 16% crosslinking, containing a drug adsorbed in an amount not less than 80% of its theoretical ion adsorption amount and coated with a water-permeable polymer. 
Takeda Chemical Industries, Ltd.
A A A
A61K A61K A61K
inventional inventional inventional
Masayuki Muneo Yasuyuki
Yamada Nonomura Suzuki