Hydrophilic polymers may be included in tablets in order to form a viscous, gelling layer which retards water penetration and acts as a barrier to drug release.
Drug release is accomplished by diffusion through and erosion of this barrier. Zero-order release profiles can be achieved by selection of appropriate polymers and other fillers/ binders.
The use of our carrageenan and alginate in this application provide:
Viscarin® GP-209, GP-379
PROTANAL® CR 8133
You are welcome to contact us for more information.