Controlled release drug delivery system

The present invention pertains to a controlled release pharmaceutical tablet having at least three layers, two barrier layers and one drug layer. The two barrier layers erode more quickly than the drug layer. All layers are formed from s...

R Fassihi，L Yang - US

Multiple barrier layers, zero-order release, swellable, erodible polymer, polyoxyethylene glycol, hydroxypropyl methyl cellulose

The present invention pertains to a controlled release pharmaceutical tablet having at least three layers, two barrier layers and one drug layer. The two b...

R Fassihi，L Yang - US

Tablet for pharmaceutical use able to release active substances at successive times

A tablet for pharmaceutical use able to release active substances at successive times, comprising at least; a first layer containing a portion of the active substance with suitable excipients, a barrier layer of polymer material gellable...

U Conte，AL Manna，P Colombo - US

Multilayer, disintegration, cellulose derivative or polyvinyl alcohol, polymer casing

That part of the active substance not inserted in the casing is immediately available for dissolving, whereas the part inserted in the casing is available ...

U Conte，AL Manna，P Colombo