Single dose vaccination system
First Claim
1. A pharmaceutical or veterinary implant, which when parenterally administered releases a pulse of at least one biologically active material at a controllable time interval after implantation, said implant comprising:
- a) a core comprising the biologically active material and a tabletting excipient comprising at least one water soluble material and at least one water insoluble swellable material; and
,b) at least one polymer film coating adapted to rupture at a predetermined time after implantation, said coating being permeable or semi-permeable to physiological fluid and essentially surrounding said core and preventing release of the core prior to rupture,wherein said excipient and said at least one polymer film coating are biocompatible.
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Accused Products
Abstract
The invention provides a pharmaceutical or veterinary implant, which when parenterally administered releases a pulse of at least one biologically active material at a controllable time interval after implantation. The implant comprises the biologically active material; an excipient comprising at least one water soluble material and at least one water insoluble material; and a polymer film coating adapted to rupture at a predetermined period of time after implantation, and wherein the excipients and polymers are biocompatible. The biologically active material is selected from the group consisting of antigens, antibodies, hormones, growth promotants, antibiotics, nutrients, minerals and vitamins. Preferably the excipient comprises a combination of two or more water-soluble and water-insoluble materials.
78 Citations
15 Claims
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1. A pharmaceutical or veterinary implant, which when parenterally administered releases a pulse of at least one biologically active material at a controllable time interval after implantation, said implant comprising:
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a) a core comprising the biologically active material and a tabletting excipient comprising at least one water soluble material and at least one water insoluble swellable material; and
,b) at least one polymer film coating adapted to rupture at a predetermined time after implantation, said coating being permeable or semi-permeable to physiological fluid and essentially surrounding said core and preventing release of the core prior to rupture, wherein said excipient and said at least one polymer film coating are biocompatible. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 14, 15)
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7. A pharmaceutical or veterinary implant which when parenterally administered releases a biologically active material in a delayed pulsed release manner, wherein the implant comprises the biologically active material and excipients as a compressed or moulded core encased within a polymeric coating which degrades sufficiently after a period of time to release the biologically active material, wherein all of the implant components are biocompatible.
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13. A method of administration of a biologically active material to a mammal, comprising the step of parenterally implanting into said mammal an implant wherein the implant comprises:
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a) a core comprising the biologically active material and a tabletting excipient comprising at least one water soluble material and at least one water insoluble swellable material; and
,b) at least one polymer film coating adapted to rupture at a predetermined time after implantation, said coating being permeable or semi-permeable to physiological fluid and essentially surrounding said core and preventing release of the core prior to rupture, wherein said excipient and said at least one polymer film coating are biocompatible.
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Specification