Methods and dosage forms for controlled delivery of paliperidone and risperidone
First Claim
1. A method for treating a subject in need of treatment comprising orally administering a once-a-day oral dosage form containing as an active agent a therapeutically effective amount of paliperidone or a pharmaceutically acceptable addition salts thereof wherein the dosage form comprises:
- (a) a core having three layers and a portion of the active agent is contained within a first drug composition layer and the remaining portion of the active agent is contained within a second drug composition layer, wherein the proportion of active agent contained within the first layer to the active agent contained within the second layer is less than about 0.33, wherein the first drug composition layer contains an osmagent and a second drug composition layer does not contain an osmagent and wherein a fluid-expandable polymer is contained within a third layer;
(b) a subcoat surrounding said core;
(c) a semipermeable membrane surrounding the core to form a compartment having an osmotic gradient to drive fluid from an external fluid environment contacting the semipermeable membrane into the compartment; and
(d) an orifice formed through the semipermeable membrane and into the core to permit the active agent to be released from within the compartment into the external fluid environment wherein the first drug composition layer is proximal to the orifice;
wherein the dosage form following oral administration to said subject releases the active agent at a substantially ascending release rate for at least 18 hours as determined by in vitro dissolution testing.
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Abstract
Dosage forms and methods for providing a substantially ascending rate of release of paliperidone or risperidone are provided. The sustained release dosage forms provide therapeutically effective average steady-state plasma paliperidone or risperidone concentrations when administered once per day. This once-a-day dosing regimen results in only one peak plasma paliperidone or risperidone concentration occurrence in each 24 hour period. In addition, the peak plasma paliperidone or risperidone concentration occurs at a later time following dose administration and exhibits a lesser magnitude than the peak plasma paliperidone or risperidone concentration that occurs following administration of paliperidone or risperidone in an immediate-release dosage form.
246 Citations
14 Claims
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1. A method for treating a subject in need of treatment comprising orally administering a once-a-day oral dosage form containing as an active agent a therapeutically effective amount of paliperidone or a pharmaceutically acceptable addition salts thereof wherein the dosage form comprises:
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(a) a core having three layers and a portion of the active agent is contained within a first drug composition layer and the remaining portion of the active agent is contained within a second drug composition layer, wherein the proportion of active agent contained within the first layer to the active agent contained within the second layer is less than about 0.33, wherein the first drug composition layer contains an osmagent and a second drug composition layer does not contain an osmagent and wherein a fluid-expandable polymer is contained within a third layer; (b) a subcoat surrounding said core; (c) a semipermeable membrane surrounding the core to form a compartment having an osmotic gradient to drive fluid from an external fluid environment contacting the semipermeable membrane into the compartment; and (d) an orifice formed through the semipermeable membrane and into the core to permit the active agent to be released from within the compartment into the external fluid environment wherein the first drug composition layer is proximal to the orifice; wherein the dosage form following oral administration to said subject releases the active agent at a substantially ascending release rate for at least 18 hours as determined by in vitro dissolution testing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13)
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8. A oral tablet dosage form comprising as an active agent a therapeutically effective amount of paliperidone or a pharmaceutically acceptable addition salts thereof wherein the dosage form comprises:
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(a) a core having three layers and a portion of the active agent is contained within a first drug composition layer and the remaining portion of the active agent is contained within a second drug composition layer, wherein the proportion of active agent contained within the first layer to the active agent contained within the second layer is less than about 0.33, wherein the first drug composition layer contains an osmagent and a second drug composition layer does not contain an osmagent and wherein a fluid-expandable polymer is contained within a third layer; (b) a subcoat surrounding said core; (c) a semipermeable membrane surrounding the core to form a compartment having an osmotic gradient to drive fluid from an external fluid environment contacting the semipermeable membrane into the compartment; and (d) an orifice formed through the semipermeable membrane and into the core to permit the active agent to be released from within the compartment into the external fluid environment wherein the first drug composition layer is proximal to the orifice; wherein the dosage form following oral administration to a subject releases the active agent from the dosage form at a substantially ascending release rate for at least 18 hours as determined by in vitro dissolution testing. - View Dependent Claims (9, 10, 11, 12, 14)
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Specification