Controlled release dispenser comprising beneficial agent

Details Controlled release dispenser comprising beneficial agent Controlled release dispenser comprising beneficial agent

1991-09-19

1993-12-28

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Specially adapted for ruminant animal

424422, 424473, A23K 118

Patent

active

052737527

ABSTRACT:
A dispenser is disclosed for delivering a beneficial agent in a hydrophilic carrier formulation to an animal in a rate-controlled manner. The dispenser comprises (1) a semipermeable housing defining an internal space, (2) at least one composition comprising a beneficial agent and a pharmaceutically acceptable hydrophilic carrier in the space, (3) an expandable hydrophilic driving member in the space, (4) a density member in the space, and (5) one exit passageway or a multiplicity of exit passageways in the housing for delivering the beneficial agent from the dispenser, the diameter of each exit passageway being of a size to maximize release of the beneficial agent by osmotic pumping and to minimize release of the beneficial agent by diffusion or erosion to substantially avoid mechanical agitation-dependent release of the beneficial agent.

REFERENCES:
patent: 3133132 (1960-11-01), Loeb et al.
patent: 3173876 (1965-03-01), Zobrist
patent: 3276586 (1966-10-01), Rosaen
patent: 3541005 (1970-11-01), Strathmann et al.
patent: 3541006 (1970-11-01), Bixler et al.
patent: 3546142 (1970-12-01), Michaels et al.
patent: 3845770 (1974-11-01), Theeuwes et al.
patent: 3865108 (1975-02-01), Hartop
patent: 3916899 (1975-11-01), Theeuwes et al.
patent: 3995632 (1976-12-01), Nakano et al.
patent: 4002173 (1977-01-01), Manning et al.
patent: 4111202 (1978-09-01), Theeuwes
patent: 4160020 (1979-07-01), Ayer et al.
patent: 4207893 (1980-06-01), Michaels
patent: 4218443 (1980-08-01), Comai et al.
patent: 4251506 (1981-02-01), Laby
patent: 4327725 (1982-05-01), Cortese et al.
patent: 4595583 (1986-06-01), Eckenhoff
patent: 4612008 (1986-09-01), Wong et al.
patent: 4612186 (1986-09-01), Eckenkoff et al.
patent: 4783337 (1988-11-01), Wong et al.
patent: 4824675 (1989-04-01), Wong et al.
patent: 4865598 (1989-09-01), Eckenhoff
patent: 4872873 (1989-10-01), Zingerman
patent: 4876093 (1989-10-01), Theeuwes et al.
patent: 4892778 (1990-01-01), Theeuwes et al.
patent: 4915949 (1990-04-01), Wong et al.
patent: 4940465 (1990-07-01), Theeuwes et al.
patent: 5023088 (1991-06-01), Wong et al.
patent: 5126142 (1992-06-01), Ayer et al.
Feedstuffs, pp. 14, 15 and 22 (1989).
Annals New York Academy of Sciences, vol. 264, pp. 373-386 (1985).

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