U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Drug-resin complexes stabilized by chelating agents

Patent 5980882 Issued on November 9, 1999. Estimated Expiration Date: Icon_subject April 16, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

2697059

2751325

2990332

3035984

3070503

3070508

3100738

3108044

3143465

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Inventor

Assignee

Application

No. 834359 filed on 04/16/1997

US Classes:

424/78.12, Adsorbate or treating agent contains nitrogen424/78.1, Ion exchange resin424/483Ion-exchange resins

Examiners

Primary: Kulkosky, Peter F.

Attorney, Agent or Firm

Foreign Patent References

  • 4640351 JP 11/11/1971

International Classes

A61K 047/32
A61K 009/30

Abstract

The invention provides a pharmaceutical composition comprising a drug-resin complex and a chelating agent in which the composition is in the form of a solid or a gel. The invention also provides a method of making such a composition and a method for improving the stability of a pharmaceutical composition.

Other References

  • Packaging for Delsym.RTM. DM Controlled-Release Dextromethorphan Polystirex Suspension, Ciba Self Medication, Mississanga, Ontario, Jan. 31, 199
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