Patent ID: 7153497

Claim:
A dosage form comprising: an active ingredient/ion exchange resin complex, in which said ion exchange resin in said complex is at least one of a styrenic strongly acidic cation exchange resin with a sulfonic acid functionality with a weight capacity of 0.1 to 8 meq/g and an acrylic or methacrylic weakly acidic cation exchange resin with a carboxylic acid functionality with weight capacity of 0.1 to 14 meq/g; and, an unloaded cation ion exchange resin which is at least one of a styrenic strongly acidic cation exchange resin with a sulfonic acid functionality with a weight capacity of 0.1 to 8 meq/g and an acrylic or methacrylic weakly acidic cation exchange resin with a carboxylic acid functionality with weight capacity of 0.1 to 14 meq/g; wherein a ratio of unloaded cation exchange resin to said complex is from 0.01:1 to 99:1.