Rapidly expanding composition for gastric retention and controlled release of therapeutic agents, and dosage forms including the composition
First Claim
1. A pharmaceutical dosage form for oral administration to a patient providing pulsed gastric release of methylphenidate comprising:
- a) a gastric retention vehicle composition comprising about 10 wt-% to about 75 wt-% superdisintegrant, about 2 wt-% to about 12 wt-% tannic acid, and about 20 to about 70 wt-% of a hydrogel, whereby the gastric retention vehicle composition is a homogenous solid matrix and the percentages are calculated with respect to the matrix exclusive of other excipients and the methylphenidate,b) a plurality of first particles containing methylphenidate that are dispersed in the matrix, wherein the methylphenidate is released from the first particles into the stomach upon contact with gastric fluid, andc) a plurality of second particles containing methylphenidate that are dispersed in the matrix, wherein each of the second particles is coated with a coating that is impermeable to methylphenidate and dissolves in gastric fluid, and, after a sufficient amount of the coating is dissolved, the methylphenidate is released from the second particles into the stomach,wherein, upon contact with gastric fluid the gastric retention vehicle composition expands to a sufficient degree such that the dosage form is retained in the stomach at least until methylphenidate is released from the second particles.
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Abstract
The present invention provides a pharmaceutical composition for use in a dosage form for oral administration to a patient. The composition expands upon contact with gastric fluid and promotes retention of the dosage form in the patient'"'"'s stomach for a prolonged period of time. The present invention further provides pharmaceutical dosage forms containing an active ingredient, and the pharmaceutical composition. The forms are adapted for immediate or controlled release of the active ingredient. The dosage forms may be used advantageously in the treatment of Parkinson'"'"'s disease with levodopa and hyperactivity and attention deficit disorder with methylphenidate.
73 Citations
24 Claims
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1. A pharmaceutical dosage form for oral administration to a patient providing pulsed gastric release of methylphenidate comprising:
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a) a gastric retention vehicle composition comprising about 10 wt-% to about 75 wt-% superdisintegrant, about 2 wt-% to about 12 wt-% tannic acid, and about 20 to about 70 wt-% of a hydrogel, whereby the gastric retention vehicle composition is a homogenous solid matrix and the percentages are calculated with respect to the matrix exclusive of other excipients and the methylphenidate, b) a plurality of first particles containing methylphenidate that are dispersed in the matrix, wherein the methylphenidate is released from the first particles into the stomach upon contact with gastric fluid, and c) a plurality of second particles containing methylphenidate that are dispersed in the matrix, wherein each of the second particles is coated with a coating that is impermeable to methylphenidate and dissolves in gastric fluid, and, after a sufficient amount of the coating is dissolved, the methylphenidate is released from the second particles into the stomach, wherein, upon contact with gastric fluid the gastric retention vehicle composition expands to a sufficient degree such that the dosage form is retained in the stomach at least until methylphenidate is released from the second particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A pharmaceutical dosage form for oral administration to a patient providing pulsed gastric release of methylphenidate comprising:
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a) a gastric retention vehicle composition comprising about 20 wt-% to about 70 wt-% of a hydrogel, about 10 wt-% to about 75 wt-% superdisintegrant and about 2 wt-% to about 12 wt-% tannic acid, the percentages calculated exclusive of other excipients or the methylphenidate, b) a first reservoir containing methylphenidate embedded in said gastric retention vehicle composition wherein methylphenidate is released from the first reservoir into the stomach upon contact of the dosage form with gastric fluid, and c) a second reservoir containing methylphenidate embedded in said gastric retention vehicle composition, wherein the second reservoir is coated with a coating that is impermeable to methylphenidate and dissolves in gastric fluid, and, after a sufficient amount of the coating is dissolved, the methylphenidate is released from the second reservoir into the stomach, wherein, upon contact with gastric fluid the gastric retention vehicle composition expands to a sufficient degree such that the dosage form is retained in the stomach at least until methylphenidate is released from the second reservoir. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification