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1. US20080089936 - PROLONGED RELEASE FORMULATION OF ACTIVE PRINCIPLES HAVING A PH-DEPENDENT SOLUBILITY

Office United States of America
Application Number 11949291
Application Date 03.12.2007
Publication Number 20080089936
Publication Date 17.04.2008
Publication Kind A1
IPC
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
K
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
9
Medicinal preparations characterised by special physical form
20
Pills, lozenges or tablets
22
Sustained or differential release type
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
K
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
31
Medicinal preparations containing organic active ingredients
33
Heterocyclic compounds
395
having nitrogen as a ring hetero atom, e.g. guanethidine, rifamycins
435
having six-membered rings with one nitrogen as the only ring hetero atom
44
Non-condensed pyridines; Hydrogenated derivatives thereof
445
Non-condensed piperidines, e.g. piperocaine
4523
containing further heterocyclic ring systems
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
K
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
31
Medicinal preparations containing organic active ingredients
33
Heterocyclic compounds
395
having nitrogen as a ring hetero atom, e.g. guanethidine, rifamycins
435
having six-membered rings with one nitrogen as the only ring hetero atom
44
Non-condensed pyridines; Hydrogenated derivatives thereof
445
Non-condensed piperidines, e.g. piperocaine
4523
containing further heterocyclic ring systems
454
containing a five-membered ring with nitrogen as a ring hetero atom, e.g. pimozide, domperidone
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
K
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
31
Medicinal preparations containing organic active ingredients
33
Heterocyclic compounds
395
having nitrogen as a ring hetero atom, e.g. guanethidine, rifamycins
495
having six-membered rings with two nitrogen atoms as the only ring hetero atoms, e.g. piperazine
505
Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
506
not condensed and containing further heterocyclic rings
A61K 9/22
A61K 31/4523
A61K 31/454
A61K 31/506
Applicants SANOFI-AVENTIS
Inventors ALAUX Gerard
ANDRE Frederic
LEWIS Gareth
SERRE Veronique
Agents ANDREA Q. RYAN;SANOFI-AVENTIS U.S. LLC
Priority Data 05006539 28.06.2005 FR
Title
(EN) PROLONGED RELEASE FORMULATION OF ACTIVE PRINCIPLES HAVING A PH-DEPENDENT SOLUBILITY
Abstract
(EN)

The invention concerns a novel formulation for prolonged release of an active principle having a pH-dependent solubility. The inventive formulation comprises a matrix support based on hydrophilic polymer containing a specific dose of active principle, and further comprises one or more acidifying agents in the form of an acid salt of an organic acid.