Sanwa Kagaku Kenkyusho Co., Ltd.

Masaki Ando

Toshiyuki Kouzaki

Masahiro Nakajima

Hideaki Ninomiya

Fumio Higuchi

The invention relates to a polystyrene sulfonate-containing gel preparation for therapy of hyperpotassemia, wherein the particle size of polystyrene sulfonate is controlled within the range of at least 5-100 &mgr;m, the viscosity of its solution before gelation is adjusted depending on the particle size by adding a thickening agent, and the polystyrene sulfonate particles after gelation is uniformly dispersed therein. More preferably, a water-displacing agent is contained, whereby the amount of water in the preparation is reduced. This gel preparation does not cause a sense of foreign matter or a sense of roughness in the oral cavity upon ingestion and intake, thus making it unnecessary to drink water for ingestion, and further its water content is low, so that control of water intake is made easy, even in the case of a patient with renal insufficiency who is subjecting to restriction in intake of water to significant improve the quality of life of the patient.

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Nagoya, Japan

Masaki Ando