GASTRIC RETENTIVE PHARMACEUTICAL COMPOSITIONS FOR IMMEDIATE AND EXTENDED RELEASE OF ACETAMINOPHEN
First Claim
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1. A gastric retentive dosage form, comprising:
- a extended release (ER) layer comprising a first dose of acetaminophen dispersed in a polymeric matrix wherein the polymeric matrix is comprised of at least one polymer that upon imbibition of fluid swells to a size sufficient for gastric retention, andwherein the first dose of acetaminophen is released over a time period of about 8 to 9 hours in vitro.
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Abstract
Gastric retentive dosage forms for extended release of acetaminophen or for both immediate and extended release of acetaminophen are described. The dosage forms allow effective pain relief upon once- or twice-daily dosing. Methods of treatment using the dosage forms and methods of making the dosage forms are also described.
128 Citations
18 Claims
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1. A gastric retentive dosage form, comprising:
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a extended release (ER) layer comprising a first dose of acetaminophen dispersed in a polymeric matrix wherein the polymeric matrix is comprised of at least one polymer that upon imbibition of fluid swells to a size sufficient for gastric retention, and wherein the first dose of acetaminophen is released over a time period of about 8 to 9 hours in vitro. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for making a tablet comprising an extended release (ER) layer comprising a first dose of acetaminophen dispersed in a polymeric matrix,
wherein making the ER layer comprises granulating acetaminophen powder with at least one hydrophilic polymer, or compressing the at least one hydrophilic polymer with a pregranulated acetaminophen composition.
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14. A method for treating a subject diagnosed with or suffering from a pain state comprising administering a gastric retentive dosage form, comprising:
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an ER layer comprising a first dose of acetaminophen dispersed in a polymeric matrix wherein the polymeric matrix is comprised of at least one polymer that upon imbibition of fluid swells to a size sufficient for gastric retention, and wherein the first dose of acetaminophen is released over a time period of about 8 to 9 hours in vitro; wherein the subject is in a fed mode. - View Dependent Claims (15, 16, 17, 18)
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Specification