Details for Patent: 6,955,821

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Summary for Patent: 6,955,821

Title:	Sustained release formulations of guaifenesin and additional drug ingredients
Abstract:	The invention relates to a novel pharmaceutical sustained release formulation of guaifenesin and at least one additional drug ingredient. 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, wherein one or both portions has at least one additional drug ingredient. 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:	Adams Laboratories, Inc. (Fort Worth, TX)
Application Number:	10/121,706
Patent Litigation and PTAB cases:	See patent lawsuits and PTAB cases for patent 6,955,821
Patent Claim Types: see list of patent claims	Formulation; Compound; Composition; Dosage form; Use; Delivery;

Drugs Protected by US Patent 6,955,821

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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

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Australia	2001255680	⤷ Sign Up
Australia	2003237807	⤷ Sign Up
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