초록

A dosage form is disclosed comprising a wall that surrounds a bilayer core with exit passageway for communicating with the bilayer core in the wall.

대표청구항 ▼

[ We claim:] [1.] A dosage form for the delivery of a drug to an animal, wherein the dosage form comprises:(a) a wall comprising a semipermeable composition permeable to the passage of fluid and impermeable to the passage of drug, which wall comprises a side that surrounds:(b) an interior compartmen

[ We claim:] [1.] A dosage form for the delivery of a drug to an animal, wherein the dosage form comprises:(a) a wall comprising a semipermeable composition permeable to the passage of fluid and impermeable to the passage of drug, which wall comprises a side that surrounds:(b) an interior compartment;(c) a drug layer in the compartment comprising a drug and a pharmaceutically acceptable polymer carrier for delivering the drug from the dosage form;(d) a push layer in the compartment comprising an osmopolymer that imbibes fluid, expands and pushes the drug layer from the dosage form, the push layer comprising an osmopolymer possessing a higher molecular weight than the polymer in the drug layer; and wherein the dosage form is characterized by:(e) exit means in the side of the wall that connects with both the drug layer and the push layer with the exterior of the dosage form.