Polymeric nitrogen-containing drug salt forms for controlled rel

Details Polymeric nitrogen-containing drug salt forms for controlled rel Polymeric nitrogen-containing drug salt forms for controlled rel

1996-09-05

1998-04-07

Krass, Frederick

Drug, bio-affecting and body treating compositions

Topical body preparation containing solid synthetic organic...

424 7804, 424 7817, 424 7835, 5147726, A61K 3174

Patent

active

057361274

ABSTRACT:
The present invention is directed to a composition comprising a nitrogen-containig drug-polymer salt and a method for making said composition. The drug-polymer salt is comprised of one or more drugs having basic groups as part of their chemical structure which are capable of forming salts with acids and one or more hydrophilic polymers containing carboxylate groups and amidine groups as pendant groups. Such polymeric salts of drugs have been found to have excellent bio-availability and advantageous release profiles in various forms (gels, ointments, pills, etc.). Particularly advantageous polymers contain pendant nitrile groups in addition to carboxyls and amidines which provide the polymer with hydrogel characteristics.

REFERENCES:
patent: 4221778 (1980-09-01), Raghunathan
patent: 4943618 (1990-07-01), Stoy et al.
patent: 4997643 (1991-03-01), Partrain, III et al.
Chemical Abstracts 111:12365, "New Type of Hydrogel for Controlled Drug Delivery", Vladimir A. Stoy, 1989.

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