Crystalline composition containing escitalopram

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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C514S469000

Reexamination Certificate

active

07420068

ABSTRACT:
The present invention discloses crystalline particles of escitalopram oxalate which either have a broad particle size distribution or comprise at least 0.01% (w/w) of Z-4-(4-dimethylamino-1-(4-fluorophenyl)-but-1-enyl)-3-hydroxymethyl-benzonitrile, said particles being suitable for use in direct compression.Furthermore, the invention discloses a novel pharmaceutical unit dosage form containing such crystalline particles of escitalopram oxalate as well as methods for manufacture of such crystalline particles of escitalopram oxalateFinally, the invention provides a method for reduction of the amount of hydroxyl containing impurities in a solution of citalopram or escitalopram.

REFERENCES:
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patent: RE34712 (1994-08-01), Boegesoe et al.
patent: 6566540 (2003-05-01), Rock et al.
patent: WO-02/087566 (2002-11-01), None
patent: WO-03/000672 (2003-01-01), None
patent: WO-03/006449 (2003-01-01), None
patent: WO-03/011278 (2003-02-01), None
patent: WO-03/051861 (2003-06-01), None
patent: WO2004/014821 (2004-02-01), None
patent: WO2004/085416 (2004-10-01), None
U.S. Appl. No. 10/851,763 to Jensen et al., filed May 21, 2004.
PCT International Search Report of International Appln. No. PCT/DK2005/000115.

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