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Last Updated: September 28, 2021

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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
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

International Family Members for US Patent 7,838,032

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria 391494 ⤷  Free Forever Trial
Australia 2001255680 ⤷  Free Forever Trial
Australia 2003237807 ⤷  Free Forever Trial
Australia 5568001 ⤷  Free Forever Trial
Canada 2405031 ⤷  Free Forever Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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