Controlled release drug delivery device
First Claim
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1. A drug delivery device which comprises:
- a) a solid core comprising a pharmaceutical or veterinary active agent;
b) a substantially soluble delay jacket coated over the core through which the active agent can diffuse, the delay jacket comprising at least one component selected from the group consisting of a binder, an osmotic agent, and a lubricant;
c) a semi-permeable membrane coated over the delay jacket andd) an additional layer of active agent.
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Abstract
A drug delivery device for delivering a drug either intermittently or to a pre-selected region of the gastro-intestinal tract, particularly to the colon, consists of an a solid core comprising an active agent coated with a delay jacket, then coated with a semi-permeable membrane which is optionally drilled to provide a release orifice, and then optionally further coated with an enteric material. The device delivers substantially all of the active agent to the targeted site.
298 Citations
23 Claims
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1. A drug delivery device which comprises:
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a) a solid core comprising a pharmaceutical or veterinary active agent; b) a substantially soluble delay jacket coated over the core through which the active agent can diffuse, the delay jacket comprising at least one component selected from the group consisting of a binder, an osmotic agent, and a lubricant; c) a semi-permeable membrane coated over the delay jacket and d) an additional layer of active agent. - 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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21. A method of making an orally administrable active agent delivery device which comprises:
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a) forming a solid core comprising a pharmaceutical or veterinary active agent; b) coating said core with a substantially soluble delay jacket through which the active agent can diffuse, the delay jacket comprising at least one component selected from the group consisting of a binder, an osmotic agent, and a lubricant; c) coating said delay jacket with a semi-permeable membrane; and d) adding an additional layer of active agent, said additional layer of active agent being; i) between the delay jacket and the semi-permeable membrane;
orii) outside of the semi-permeable membrane. - View Dependent Claims (22)
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23. A method of making an orally administrable active agent delivery device which comprises:
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a) forming a solid core comprising a pharmaceutical or veterinary active agent; b) coating said core with a substantially soluble delay jacket through which the active agent can diffuse, the delay jacket comprising at least one component selected from the group consisting of a binder, an osmotic agent, and a lubricant; c) coating said delay jacket with a semi-permeable membrane; d) coating said semi-permeable membrane with an enteric coating; and e) adding an additional layer of active agent, said additional layer of active agent being; i) between the delay jacket and semi-permeable membrane; ii) between the semi-permeable membrane and the enteric coating;
oriii) outside of the enteric coating.
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Specification