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Drug composition

  • US 5,474,989 A
  • Filed: 03/01/1994
  • Issued: 12/12/1995
  • Est. Priority Date: 11/11/1988
  • Status: Expired due to Fees
First Claim
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1. A medicinal pharmaceutical composition comprising a medicinal pharmaceutical component having a low water solubility and a water-soluble chitosan derivative having a weight average molecular weight in the range of from 500 to 50×

  • 103 and which is soluble in neutral and alkaline water, said water-soluble chitosan derivative being obtained by subjecting high molecular weight chitosan to a molecular weight degradation reaction with an enzyme, hydrogen peroxide, a nitrite ion or an alkali.

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