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Sulfoalkyl ether cyclodextrin based controlled release solid pharmaceutical formulations

Patent 6046177 Issued on April 4, 2000. Estimated Expiration Date: Icon_subject January 13, 2019. 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

3426011

Water soluble cyclodextrin polymers substituted by ionic groups and process for the preparation thereof
Patent #: 4535152
Issued on: 08/13/1985
Inventor: Szejtli ,   et al.

Pharmaceutical preparations containing cyclodextrin derivatives
Patent #: 4727064
Issued on: 02/23/1988
Inventor: Pitha

Controlled release agent for cetylpyridinium chloride
Patent #: 4774329
Issued on: 09/27/1988
Inventor: Friedman

Sustained release drug preparation
Patent #: 4869904
Issued on: 09/26/1989
Inventor: Uekama ,   et al.

Solubility modulated drug delivery system
Patent #: 4946686
Issued on: 08/07/1990
Inventor: McClelland, et al.

Derivatives of cyclodextrins exhibiting enhanced aqueous solubility and the use thereof
Patent #: 5134127
Issued on: 07/28/1992
Inventor: Stella, et al.

Sulfoalkyl ether cyclodextrin based solid pharmaceutical formulations and their use Patent #: 5874418
Issued on: 02/23/1999
Inventor: Stella, et al.

Inventors

Assignee

Application

No. 229513 filed on 01/13/1999

US Classes:

514/58, Dextrin or derivative514/778, Starch or derivative514/964, SUSTAINED OR DIFFERENTIAL RELEASE TYPE514/965, Discrete particles in supporting matrix536/103Dextrin or derivative

Examiners

Primary: Kunz, Gary L.

Attorney, Agent or Firm

Foreign Patent References

  • 2197941 CA. 08/13/1997
  • 0251459 EP. 01/13/1988
  • 195 13 659 A1 DE. 09/13/1996
  • 58-172311A2 JP. 10/13/1983
  • 59-084821A2 JP. 05/13/1984
  • 62-149628A2 JP. 07/13/1987
  • 64-40567A2 JP. 02/13/1989
  • 2 290 964 GB. 01/13/1996
  • WO 94/06416 WO. 03/13/1994
  • WO 94/14421 WO. 07/13/1994
  • WO 95/01781 WO. 01/13/1995

International Classes

A61K 031/735
C07H 013/12
C08B 037/16

Abstract

Sulfoalkyl ether cyclodextrin (SAE-CD) based controlled release pharmaceutical formulations are provided by the present invention. The present solid pharmaceutical formulations consist of a core comprising a physical mixture of one or more SAE-CD derivatives, an optional release rate modifier, a therapeutic agent, a major portion of which is not complexed to the SAE-CD, and an optional release rate modifying coating surrounding the core. The present formulations are advantageously easier to prepare than other SAE-CD based formulations in the art yet provide similar or improved effectiveness. The SAE-CD derivative is used to modify the bioavailability and/or rate of bioabsorption of therapeutic agents. Multi-layered, osmotic pump, coated, and uncoated tablet, minitablet, pellet, micropellet, particle, powder, and granule dosage forms are disclosed herein.

Other References

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