Antipsychotic injectable depot composition
First Claim
1. An injectable depot composition consisting of:
- drug, which is risperidone present as particles having a particle size distribution as follows;
not more than 10% of the total volume of drug particles is less than 10 microns in size, not more than 10% of the total volume of drug particles is greater than 225 microns in size, and the d0.5 of the size distribution is in the range of about 60-130 microns; and
polymeric solution consisting of;
DMSO; and
biocompatible poly(lactide-co-glycolide) (PLGA) copolymer comprising lactic acid and glycolic acid monomers, wherein the monomers are present at a monomer ratio of lactic to glycolic acid of 48;
52 to 52;
48, the copolymer has an inherent viscosity in the range of 0.25-0.48 dl/g as measured in chloroform at 25°
C. and at a concentration of 0.1% wt/v with a Ubbelohde size 0c glass capillary viscometer;
whereinthe polymeric solution has a viscosity in the range of about 0.7 Pa.s to about 3.0 Pa.s; and
whereinthe drug content is about 13% wt with respect to the total composition weight;
the DMSO to drug mass ratio is about 4;
1 to 5;
1;
the polymeric solution to drug mass ratio is about 6.5;
1 to 7;
1.
1 Assignment
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Accused Products
Abstract
The present invention is directed to a composition that can be used to deliver an antipsychotic drug such as risperidone as an injectable in-situ forming biodegradable implant for extended release providing therapeutic plasma levels from the first day. The composition is in the form of drug suspension on a biodegradable and biocompatible copolymer or copolymers solution using water miscible solvents that is administered in liquid form. Once the composition contacts the body fluids, the polymer matrix hardens retaining the drug, forming a solid or semisolid implant that releases the drug in a continuous manner. Therapeutic plasma levels of the drug can be achieved since the first day up to at least 14 days or more even up to at least four weeks.
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Citations
20 Claims
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1. An injectable depot composition consisting of:
-
drug, which is risperidone present as particles having a particle size distribution as follows;
not more than 10% of the total volume of drug particles is less than 10 microns in size, not more than 10% of the total volume of drug particles is greater than 225 microns in size, and the d0.5 of the size distribution is in the range of about 60-130 microns; andpolymeric solution consisting of; DMSO; and biocompatible poly(lactide-co-glycolide) (PLGA) copolymer comprising lactic acid and glycolic acid monomers, wherein the monomers are present at a monomer ratio of lactic to glycolic acid of 48;
52 to 52;
48, the copolymer has an inherent viscosity in the range of 0.25-0.48 dl/g as measured in chloroform at 25°
C. and at a concentration of 0.1% wt/v with a Ubbelohde size 0c glass capillary viscometer;
whereinthe polymeric solution has a viscosity in the range of about 0.7 Pa.s to about 3.0 Pa.s; and
whereinthe drug content is about 13% wt with respect to the total composition weight; the DMSO to drug mass ratio is about 4;
1 to 5;
1;the polymeric solution to drug mass ratio is about 6.5;
1 to 7;
1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification