Sustained drug release device
AssigneeBeecham Group Limited
InventorsGerald J. L. Griffin, Malcolm D. Brewer
Life of this patent
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Abstract
A device for oral administration to a ruminant animal includes a veterinary medicament, such as an anthelmintic, uniformly dispersed throughout an erodable sheet comprising an ethylene-vinylacetate copolymer. The sheet is rolled up and stuck together with adhesive backed paper strips for administration, and unrolls in the rumen to take up a planar configuration which is retained in the rumen. The sheet may be placed within a plastics netting envelope to give more controlled erosion and release of medicament.
Claims4
A device for administration of a veterinary medicament to a ruminant comprising a first resilient sheet of an erodable ethylene-vinyl acetate copolymer in which said medicament is uniformly dispersed and a second resilient, support sheet of a water insoluble polymer, said second sheet being at least dimensionally coextensive with said first sheet and to which said first sheet is attached, said device being of a size and composition such that it is capable of constraint in a rolled-up configuration permitting oral administration and of a subsequent assumption of an unrolled configuration when unconstrained in the rumen.
Dependencies are inferred from the claim text.