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Last Updated: November 19, 2019

DrugPatentWatch Database Preview

Details for Patent: 7,838,032

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Summary for Patent: 7,838,032
Title:Sustained release of guaifenesin
Abstract:The invention relates to a novel pharmaceutical sustained release formulation of guaifenesin. The formulation may comprise a hydrophilic polymer, preferably a hydroxypropyl methylcellulose, and a water-insoluble polymer, preferably an acrylic resin, in a ratio range of about one-to-one (1:1) to about nine-to-one (9:1), more preferably a range of about three-to-two (3:2) to about six-to-one (6:1), and most preferably in a range of about two-to-one (2:1) to about four-to-one (4:1) by weight. This formulation capable of providing therapeutically effective bioavailability of guaifenesin for at least twelve hours after dosing in a human subject. The invention also relates to a modified release product which has two portions: a first portion having an immediate release formulation of guaifenesin and a second portion having a sustained release formulation of guaifenesin. The modified release product has a maximum guaifenesin serum concentration equivalent to that of an immediate release guaifenesin tablet, and is capable of providing therapeutically effective bioavailability of guaifenesin for at least twelve hours after dosing in a human subject.
Inventor(s): Davis; Robert D. (Arlington, TX), Blume; Ralph W. (Fort Worth, TX), Keyser; Donald Jeffrey (Southlake, TX)
Assignee: Reckitt Benckiser Inc. (Parsippany, NJ)
Application Number:10/406,557
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 7,838,032
Patent Claim Types:
see list of patent claims
Compound; Dosage form;

Drugs Protected by US Patent 7,838,032

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Rb Hlth MUCINEX guaifenesin TABLET, EXTENDED RELEASE;ORAL 021282-002 Dec 18, 2002 OTC Yes Yes   Start Trial   Start Trial Y   Start Trial
Rb Hlth MUCINEX guaifenesin TABLET, EXTENDED RELEASE;ORAL 021282-001 Jul 12, 2002 OTC Yes No   Start Trial   Start Trial Y   Start Trial
Rb Hlth MUCINEX D guaifenesin; pseudoephedrine hydrochloride TABLET, EXTENDED RELEASE;ORAL 021585-002 Jun 22, 2004 OTC Yes Yes   Start Trial   Start Trial Y   Start Trial
Rb Hlth MUCINEX D guaifenesin; pseudoephedrine hydrochloride TABLET, EXTENDED RELEASE;ORAL 021585-001 Jun 22, 2004 OTC Yes No   Start Trial   Start Trial Y   Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

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Harvard Business School
Mallinckrodt

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