The present invention relates a drug delivery device which comprises a single phase matrix of two oppositely charged polymers (one positive and one negative), which releases a drug by combined mechanisms employing hindered diffusion, swelling and erosion. The present invention also relates to a method for employing these devices.

 
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< Biopolymers obtained by solid state irradiation in an unsaturated gaseous atmosphere

< Ultrafine lightly coated superparamagnetic particles for MRI

> Sustained-release alginate gels

> Bioresorbable compositions of carboxypolysaccharide polyether intermacromolecular complexes and methods for their use in reducing surgical adhesions
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