ABUSE-DETERRENT PHARMACEUTICAL COMPOSITIONS OF OPIODS AND OTHER DRUGS

摘要

A sustained release pharmaceutical composition has been developed. The composition resists dose dumping when broken, crushed or chewed, which enhances the safety of the dosage form should it be accidentally or intentionally physically compromised. In the preferred embodiment, a drug is modified to increase its lipophilicity. In preferred embodiments the modified drug is homogeneously dispersed within microparticles composed of a material that is either slowly soluble or not soluble in water. In some embodiments the drug containing microparticles coated with one or more coating layers. The sustained release composition retards the release of drug, even if the physical integrity of the formulation is compromised (for example, by chewing or crushing) and the resulting material is placed in 0.1N HCl. However, when administered as directed, the drug is slowly released from the composition as the composition is broken down or dissolved gradually within the GI tract by a combination of diffusion, surfactant action of bile acids, mechanical erosion, and in some embodiments, enzymatic degradation.