Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Particulate form
Patent
1987-05-18
1988-11-22
Lusignan, Michael
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Particulate form
424491, 424494, 514263, 514962, 514964, A61K 916
Patent
active
047865091
ABSTRACT:
A sustained release theophylline containing oral dosage formulation comprising theophylline containing micropellets coated with from about 0.5% to about 2% by weight of a pharmaceutically acceptable water-insoluble film former, preferably ethyl cellulose and having first order release. The formulation is an improvement over theophylline containing micropellets coated with two film formers which have zero order release. The oral dosage formulation has superior non-fasting release and absorption characteristics when compared to the zero order release formulation.
REFERENCES:
patent: 3835221 (1974-09-01), Fulberth et al.
patent: 4083949 (1978-04-01), Benedikt
patent: 4587118 (1986-05-01), Hsiao
patent: 4692337 (1987-09-01), Ukigayo et al.
Pedersen et al., Pediatrics, vol. 74, No. 4, pp. 534-538, (1984).
Chang Richard
Giannini Robert P.
Hsaio Charles
Hoffman Thomas D.
Lusignan Michael
Miller Stephen I.
Rosen Gerald S.
Schering Corporation
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